Viscosity detection device for lubricating oil

Abstract

The invention relates to the technical field of lubricating oil detection, in particular to a viscosity detection device for lubricating oil, which comprises a tank body, a stirring motor is arranged at the top of the tank body, a stirring shaft in transmission connection with the stirring motor is arranged in the tank body, a stirring rod is arranged on the outer side of the stirring shaft, and a feeding hole for adding a regulating agent is further formed in the top of the tank body. According to the viscosity detection device for the lubricating oil, through the design of the split type detection assembly, the fixed cylinder can be separated from a detection piece in the fixed cylinder after each detection, so that the lubricating oil in the fixed cylinder and the lubricating oil in the tank body are mixed again, and the viscosity of the lubricating oil is detected. And then the adjusting agent is added and uniformly mixed according to the detection result, and then the fixed cylinder is connected with the detection piece for detection, so that the influence of the residual lubricating oil in the previous detection on the next detection result is avoided, and the detection accuracy is remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of lubricating oil detection, in particular to a lubricating oil viscosity detection device. Background Art

[0002] Lubricating oil, as a highly technology-intensive product, is essentially a mixture of complex hydrocarbons. It plays a vital role in industrial applications, mainly assuming multiple functions such as lubrication, cooling, corrosion prevention, surface cleaning, ensuring sealing and providing mechanical buffering.

[0003] Viscosity, as a key performance indicator to measure the internal friction of lubricating oil, is crucial to ensure that it can function effectively under various working conditions. Ideally, the lubricating oil should be able to quickly form an oil film of appropriate thickness under different operating conditions. This oil film is like a protective cover, tightly wrapping the mechanical parts, effectively reducing the friction and wear between them, thereby extending the service life of the equipment. However, too high viscosity will lead to the problem of weakened fluidity, making it difficult for the lubricating oil to quickly reach the friction surface, which not only prolongs the startup time, but may also aggravate the wear of parts in the early stage of startup. On the contrary, insufficient viscosity means that a stable and reliable oil film cannot be formed, which not only affects the lubrication effect, but also weakens the sealing performance of the equipment, posing a safety hazard to production.

[0004] Therefore, in the process of lubricant research and development and formulation, accurate monitoring and timely adjustment of viscosity are particularly important, which requires us to have a set of efficient and accurate viscosity detection devices that can reflect the viscosity state of lubricants in real time and accurately add additives to adjust viscosity. However, some detection devices on the current market, although designed to be directly immersed in the lubricant in the mixing tank, often affect the accuracy of subsequent detection due to the residual lubricant from the previous detection. This problem needs to be solved urgently. To this end, we propose a viscosity detection device for lubricants. Summary of the invention

[0005] In order to solve the above technical problems, the embodiment of the present application provides a viscosity detection device for lubricating oil, comprising a tank body, a stirring motor is arranged on the top of the tank body, a stirring shaft is arranged in the tank body and is connected to the stirring motor by transmission, a stirring rod is arranged on the outside of the stirring shaft, and a feeding port for adding a conditioning agent is also arranged on the top of the tank body, and further comprising:

[0006] The split detection assembly is arranged in the tank body and rotates synchronously with the stirring shaft. The split detection assembly includes a fixed cylinder and a detection member arranged inside the fixed cylinder. The detection member is movably sealed and installed in the fixed cylinder.

[0007] In some embodiments, the stirring shaft includes a fixed shaft and a sliding shaft arranged in the tank body, the top end of the fixed shaft is connected to the output end of the stirring motor, the sliding shaft is slidably arranged in the fixed shaft, and a connecting part for controlling the movement of the sliding shaft is arranged in the fixed shaft, and multiple stirring rods are arranged on the outside of the fixed shaft and the sliding shaft.

[0008] In some embodiments, a guide bar is fixedly provided on the outside of the sliding shaft, a guide groove is provided in the fixed shaft and slidably cooperates with the guide bar, the connecting part includes a magnetic block arranged at the top end of the sliding shaft, an electromagnet is embedded in the fixed shaft, and when the electromagnet is energized, it can repel the magnetic block and drive the sliding shaft to move, a connecting spring is provided on the top of the sliding shaft, and the top end of the connecting spring is connected to the fixed shaft.

[0009] In some embodiments, connecting ring 1 and connecting ring 2 are respectively provided on the outer sides of the stirring rods arranged at the bottom end of the fixed shaft and the top end of the sliding shaft, the fixed cylinder is fixedly connected to the connecting ring 2, and the detection component is connected to the connecting ring 1.

[0010] In some embodiments, the detection member includes a top plate and a bottom plate arranged in a fixed cylinder, a vertical rod is arranged on the bottom plate, a detection ball is sleeved on the outside of the vertical rod, and a pressure sensor is arranged on the bottom plate. When the detection ball moves to the bottom end of the vertical rod, detection can be performed through the pressure sensor to thereby derive the time for the detection ball to fall in the lubricating oil. A limit member for limiting the detection ball is arranged on the outside of the fixed cylinder.

[0011] In some embodiments, sealing rings are fixedly provided on the outer sides of the top plate and the bottom plate, and sealing grooves are provided on the top and bottom of the inner wall of the fixed cylinder corresponding to the top plate and the bottom plate.

[0012] In some embodiments, a through hole is opened in the middle of the detection ball, the vertical rod passes through the through hole, and the diameter of the through hole is larger than the outer diameter of the vertical rod.

[0013] In some embodiments, the limiting member includes a connecting tube fixedly arranged on the outside of the fixed cylinder, a fixing ring fixedly arranged inside the bottom end of the connecting tube, a supporting spring arranged on the fixing ring, a pressure rod arranged on the top of the supporting spring, the pressure rod slidably arranged at the port of the connecting tube, a U-shaped tube slidably arranged inside the other end of the connecting tube, the end of the U-shaped tube is fixedly connected to the limiting rod, the end of the limiting rod passes through the fixed cylinder, when the bottom plate moves upward relative to the fixed cylinder, the supporting spring drives the pressure rod to move upward, and then the U-shaped tube moves toward the inside of the connecting tube under the action of air pressure.

[0014] In some embodiments, the bottom end of the vertical rod is rotatably set on the bottom plate, and the top end of the vertical rod is rotatably set through the top plate, a cavity is opened inside the top end of the vertical rod, a moving block is movably set in the cavity, a fixed spring is set at the bottom end of the moving block, the top of the moving block passes through the vertical rod and is connected to a connecting ring, a plurality of rotating shafts are rotatably set on the outside of the vertical rod, one end of the rotating shaft extends into the cavity, and a baffle is fixedly set at one end of the rotating shaft, a gear is set at one end of the rotating shaft located in the cavity, and a rack meshing with the gear is set at the bottom of the moving block.

[0015] In some embodiments, a heating wire is disposed in the fixed cylinder.

[0016] The present invention has at least the following beneficial effects:

[0017] 1. Improve detection accuracy: By designing a split detection component, the fixed cylinder can be separated from the detection part inside it after each detection, so that the lubricating oil inside it can be mixed with the lubricating oil in the tank again, and then the adjustment is added according to the test results and mixed evenly, and then the fixed cylinder and the detection part are connected for detection. This design avoids the influence of the residual lubricating oil from the previous detection on the next detection result, thereby significantly improving the accuracy of the detection;

[0018] 2. Optimize stirring effect: The stirring shaft is designed to include a fixed shaft and a sliding shaft. Through the relative movement of the fixed shaft and the sliding shaft, the stirring rod can be driven to move up and down in the tank body for stirring, making the stirring result more uniform;

[0019] 3. Good sealing and cleanliness: The sealing between the detection part and the fixed cylinder is ensured by the cooperation of the sealing ring and the sealing groove. When the fixed cylinder moves relative to the detection part, the outer side of the sealing ring is always in contact with the inner wall of the fixed cylinder, so that the residual lubricating oil inside can be scraped off and mixed with the lubricating oil in the tank body, avoiding the influence of the residual lubricating oil on the next detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the cross-sectional structure of the tank body of the present invention;

[0022] Figure 3 This is a schematic diagram of the stirring shaft structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the cross-sectional structure of the fixed shaft of the present invention;

[0024] Figure 5 It is a schematic diagram of the structure of the connecting piece of the present invention;

[0025] Figure 6It is a schematic diagram of the structure of the split detection component of the present invention;

[0026] Figure 7 It is a schematic diagram of the cross-sectional structure of the fixing tube of the present invention;

[0027] Figure 8 This is a schematic diagram of the internal structure of the fixed cylinder of the present invention;

[0028] Fig. 9 It is a schematic diagram of the structure of the position-limiting member of the present invention;

[0029] Fig.10 This is a schematic diagram of the enlarged structure of location A of the present invention;

[0030] Fig.11 This is a schematic diagram of the explosion structure at the fixed cylinder of the present invention;

[0031] Fig.12 This is a schematic diagram of the cross-sectional structure of the top of the vertical rod of the present invention;

[0032] Fig.13 Schematic diagram of the structure inside the cavity of the present invention.

[0033] In the figure: 1-tank body; 2-stirring motor; 3-stirring shaft; 31-fixed shaft; 32-sliding shaft; 33-guide strip; 34-guide groove; 4-stirring rod; 5-split detection assembly; 6-detection piece; 61-top plate; 62-bottom plate; 63-vertical rod; 64-detection ball; 65-pressure sensor; 66-sealing ring; 7-connecting piece; 71-magnetic block; 72-connecting spring; 8-limiting piece; 81-connecting pipe; 82-fixing ring; 83-support spring; 84-pressure rod; 85-U-shaped pipe; 86-limiting rod; 9-fixed cylinder; 10-connecting ring one; 11-connecting ring two; 12-moving block; 13-fixed spring; 14-rotating shaft; 15-baffle; 16-gear; 17-rack. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Example 1: Please refer to Figure 1-Figure 13The present invention provides a technical solution: a viscosity detection device for lubricating oil, comprising a tank body 1, a stirring motor 2 is arranged on the top of the tank body 1, a stirring shaft 3 connected to the stirring motor 2 is arranged in the tank body 1, a stirring rod 4 is arranged outside the stirring shaft 3, and the stirring shaft 3 drives the stirring rod 4 to rotate to stir and mix the lubricating oil, so that each raw material and the adjustment can be fully mixed, and the top of the tank body 1 is also provided with a feed inlet for adding the adjustment, and then the adjustment is added to the tank body 1 in real time according to the result of the viscosity detection, wherein the pump and related structures required for adding the adjustment are all existing technologies, which will not be repeated here, and also include:

[0036] The split detection component 5 is arranged in the tank body 1 and rotates synchronously with the stirring shaft 3. The split detection component 5 includes a fixed cylinder 9 and a detection component 6 arranged inside the fixed cylinder 9. The detection component 6 is movably sealed and installed in the fixed cylinder 9. After one detection is completed, the fixed cylinder 9 can be separated from the detection component 6 inside it, so that the lubricating oil inside it is mixed with the lubricating oil in the tank body 1 again, and then the adjustment is added according to the detection result. After the adjustment is mixed, the fixed cylinder 9 is connected to the detection component 6. At this time, the lubricating oil in the fixed cylinder 9 is the lubricating oil after the adjustment is added, and then the detection can be carried out. During each detection, there will be no residue of the lubricating oil in the fixed cylinder 9 from the previous time, so as to ensure the accuracy of the detection result.

[0037] The stirring shaft 3 includes a fixed shaft 31 and a sliding shaft 32 arranged in the tank body 1. The top end of the fixed shaft 31 is connected to the output end of the stirring motor 2. The sliding shaft 32 is slidably arranged in the fixed shaft 31, and a connecting piece 7 for controlling the movement of the sliding shaft 32 is arranged in the fixed shaft 31. A plurality of stirring rods 4 are arranged on the outside of the fixed shaft 31 and the sliding shaft 32. Through the relative movement of the fixed shaft 31 and the sliding shaft 32, the stirring rod 4 can be driven to move up and down in the tank body 1 for stirring, so that the stirring result is better.

[0038] A guide bar 33 is fixedly set on the outside of the sliding shaft 32, and a guide groove 34 that slides with the guide bar 33 is opened in the fixed shaft 31, so that the sliding shaft 32 can rotate synchronously with the fixed shaft 31. The connecting member 7 includes a magnetic block 71 arranged at the top of the sliding shaft 32, and an electromagnet is embedded in the fixed shaft 31. When the electromagnet is energized, it can repel the magnetic block 71 to drive the sliding shaft 32 to move. A connecting spring 72 is set on the top of the sliding shaft 32, and the top of the connecting spring 72 is connected to the fixed shaft 31. In actual use, the repulsive force of the electromagnet on the magnetic block 71 can be controlled by controlling the current passed into the electromagnet to drive the sliding shaft 32 to move.

[0039] A connecting ring 10 and a connecting ring 2 11 are respectively provided on the outer sides of the stirring rod 4 arranged at the bottom end of the fixed shaft 31 and the top end of the sliding shaft 32. The fixed cylinder 9 is fixedly connected to the connecting ring 2 11, and the detection part 6 is connected to the connecting ring 10. When the sliding shaft 32 slides relative to the fixed shaft 31, the sliding shaft 32 drives the connecting ring 2 11 to move, thereby driving the fixed cylinder 9 to move and separate from the detection part 6.

[0040] The detection member 6 includes a top plate 61 and a bottom plate 62 arranged in a fixed cylinder 9, a vertical rod 63 is arranged on the bottom plate 62, a detection ball 64 is sleeved on the outer side of the vertical rod 63, and a pressure sensor 65 is arranged on the bottom plate 62. During detection, by releasing the detection ball 64, the initial position of the detection ball 64 is at the upper part of the vertical rod 63, and it can fall in the lubricating oil when it is released, and then it can be detected by the pressure sensor 65 when the detection ball 64 moves to the bottom end of the vertical rod 63, and then the falling time of the detection ball 64 in the lubricating oil can be obtained, and the viscosity coefficient of the lubricating oil can be obtained by a computer, wherein the computer part is a prior art and is not drawn in the figure. A limit member 8 for limiting the detection ball 64 is arranged on the outer side of the fixed cylinder 9, and the detection ball 64 can be limited by the limit member 8 so that its initial position can be maintained at the upper part of the vertical rod 63.

[0041] Sealing rings 66 are fixedly provided on the outside of the top plate 61 and the bottom plate 62, and sealing grooves are opened on the top and bottom of the inner wall of the fixed cylinder 9 corresponding to the top plate 61 and the bottom plate 62. The sealing between the detection member 6 and the fixed cylinder 9 is ensured by the cooperation of the sealing ring 66 and the sealing groove. When the fixed cylinder 9 moves relative to the detection member 6, the outer side of the sealing ring 66 is always in contact with the inner wall of the fixed cylinder 9, so that the residual lubricating oil inside can be scraped off and then mixed with the lubricating oil in the tank body 1, so as to avoid the residual lubricating oil affecting the detection result during the next detection.

[0042] A through hole is formed in the middle of the detection ball 64 , and the vertical rod 63 passes through the through hole. The diameter of the through hole is larger than the outer diameter of the vertical rod 63 , so as to ensure that the detection ball 64 can fall freely outside the vertical rod 63 .

[0043] The limiting member 8 includes a connecting tube 81 fixedly arranged on the outside of the fixing cylinder 9, a fixing ring 82 is fixedly arranged inside the bottom end of the connecting tube 81, a supporting spring 83 is arranged on the fixing ring 82, a pressing rod 84 is arranged on the top of the supporting spring 83, the pressing rod 84 is slidably arranged at the end of the connecting tube 81, a U-shaped tube 85 is slidably arranged inside the other end of the connecting tube 81, the end of the U-shaped tube 85 is fixedly connected to the limiting rod 86, the end of the limiting rod 86 passes through the fixing cylinder 9, when the bottom plate 62 moves upward relative to the fixing cylinder 9, the supporting spring 83 drives the pressing rod 84 to move upward, and then the U-shaped tube 85 is slidably arranged at the end of the fixing cylinder 9, and the U-shaped tube 85 is fixedly connected to the limiting rod 86, and the end of the limiting rod 86 passes through the fixing cylinder 9. When the bottom plate 62 moves upward relative to the fixing cylinder 9, the supporting spring 83 drives the pressing rod 84 to move upward, and then the U-shaped tube 85 is slidably arranged at the end of the fixing cylinder 9, and the U-shaped tube 85 is fixedly connected to the fixing cylinder 9 ... U-shaped tube 85 is fixedly connected to the fixing cylinder 9, and the U-shaped tube 85 is fixedly connected to the fixing cylinder 9, and the U-shaped tube 85 is fixedly connected to the fixing cylinder The U-shaped tube 85 moves toward the connecting tube 81. When the bottom plate 62 is installed at the bottom of the fixed cylinder 9, the bottom plate 62 squeezes the pressure rod 84 to compress the support spring 83, thereby driving the U-shaped tube 85 and the limiting rod 86 to move toward the outside of the fixed cylinder 9 to release the detection ball 64, thereby performing viscosity detection. When the bottom plate 62 moves upward, the pressure rod 84 is released to drive the limiting rod 86 to extend into the fixed cylinder 9. After the bottom plate 62 drives the detection ball 64 to move upward, the limiting rod 86 can limit the detection ball 64 to ensure that it will not follow the bottom plate 62 to move down and reset again.

[0044] The bottom end of the vertical rod 63 is rotatably set on the bottom plate 62, and the top end of the vertical rod 63 is rotatably set to pass through the top plate 61. A cavity is opened inside the top end of the vertical rod 63, and a moving block 12 is movably set in the cavity. A fixing spring 13 is set at the bottom end of the moving block 12. The top of the moving block 12 passes through the vertical rod 63 and is connected to the connecting ring 10. A plurality of rotating shafts 14 are rotatably set on the outer side of the vertical rod 63. One end of the rotating shaft 14 extends into the cavity, and a baffle 15 is fixedly set at one end of the rotating shaft 14. A gear 16 is set at one end of the rotating shaft 14 located in the cavity, and a rack 17 meshing with the gear 16 is set at the bottom of the moving block 12.

[0045] When the fixed cylinder 9 moves downward, under the friction force between the sealing ring 66 and the fixed cylinder 9, the moving block 12 will move relative to the vertical rod 63, thereby driving the rack 17 to engage with the gear 16. When the gear 16 rotates, it drives the rotating shaft 14 and the baffle 15 to rotate, and the baffle 15 is initially in a horizontal state. After it rotates, it changes to a vertical state. At this time, since the fixed shaft 31 and the sliding shaft 32 are still stirring the lubricating oil in the tank body 1, the lubricating oil will drive the baffle 15 to push, and then drive the vertical rod 63 to rotate, so that the lubricating oil on the outside of the vertical rod 63 can be gradually removed and mixed by the stirring and rotating lubricating oil.

[0046] In summary, during use, the lubricating oil in the tank body 1 is always stirred. When testing is required, the fixed cylinder 9 is connected to the detection member 6, and the viscosity coefficient is obtained by detecting the falling time of the ball 64. After the test, the detection member 6 is separated from the fixed cylinder 9, and the adjustment is added to the lubricating oil according to the detected viscosity. When the adjustment is evenly mixed, the detection member 6 is connected to the fixed cylinder 9 again to realize the test. This separate design can ensure that there will be no residual lubricating oil in each test, thereby ensuring the accuracy of the test.

[0047] Embodiment 2: Based on embodiment 1, a heating wire is provided in the fixed cylinder 9 to ensure that the lubricating oil in the fixed cylinder 9 is at an optimal temperature state to ensure the accuracy of the detection result.

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0049] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A lubricating oil viscosity detection device, comprising a tank body (1), characterized in that: The tank body (1) is provided with a stirring motor (2) at the top, a stirring shaft (3) drivingly connected to the stirring motor (2) is provided inside the tank body (1), a stirring rod (4) is provided outside the stirring shaft (3), and a feeding port for adding a material is also provided at the top of the tank body (1), and the tank body (1) further comprises: The split detection assembly (5) is arranged in the tank body (1) and rotates synchronously with the stirring shaft (3). The split detection assembly (5) comprises a fixed cylinder (9) and a detection member (6) arranged inside the fixed cylinder (9). The detection member (6) is movably sealed and installed in the fixed cylinder (9).

2. The lubricating oil viscosity detection device according to claim 1, characterized in that: The stirring shaft (3) comprises a fixed shaft (31) and a sliding shaft (32) arranged in the tank body (1); the top end of the fixed shaft (31) is connected to the output end of the stirring motor (2); the sliding shaft (32) is slidably arranged in the fixed shaft (31); a connecting piece (7) for controlling the movement of the sliding shaft (32) is arranged in the fixed shaft (31); and a plurality of stirring rods (4) are arranged on the outside of the fixed shaft (31) and the sliding shaft (32).

3. The lubricating oil viscosity detection device according to claim 2, characterized in that: A guide bar (33) is fixedly arranged on the outside of the sliding shaft (32); a guide groove (34) is provided in the fixed shaft (31) and is slidably matched with the guide bar (33); the connecting member (7) comprises a magnetic block (71) arranged at the top end of the sliding shaft (32); an electromagnet is embedded in the fixed shaft (31); when the electromagnet is energized, the magnetic block (71) can be repelled to drive the sliding shaft (32) to move; a connecting spring (72) is arranged at the top of the sliding shaft (32); and the top end of the connecting spring (72) is connected to the fixed shaft (31).

4. The lubricating oil viscosity detection device according to claim 2, characterized in that: A connecting ring 1 (10) and a connecting ring 2 (11) are respectively arranged on the outer sides of the stirring rod (4) arranged at the bottom end of the fixed shaft (31) and the top end of the sliding shaft (32); the fixed cylinder (9) is fixedly connected to the connecting ring 2 (11); and the detection member (6) is connected to the connecting ring 1 (10).

5. The lubricating oil viscosity detection device according to claim 1, characterized in that: The detection member (6) comprises a top plate (61) and a bottom plate (62) arranged in a fixed cylinder (9); a vertical rod (63) is arranged on the bottom plate (62); a detection ball (64) is sleeved on the outside of the vertical rod (63); and a pressure sensor (65) is arranged on the bottom plate (62). When the detection ball (64) moves to the bottom end of the vertical rod (63), the pressure sensor (65) can detect and thereby obtain the time when the detection ball (64) falls in the lubricating oil; and a limiting member (8) for limiting the detection ball (64) is arranged on the outside of the fixed cylinder (9).

6. The lubricating oil viscosity detection device according to claim 5, characterized in that: Sealing rings (66) are fixedly arranged on the outer sides of the top plate (61) and the bottom plate (62), and sealing grooves are provided on the top and bottom of the inner wall of the fixed cylinder (9) corresponding to the top plate (61) and the bottom plate (62).

7. The lubricating oil viscosity detection device according to claim 5, characterized in that: A through hole is provided in the middle of the detection ball (64), the vertical rod (63) passes through the through hole, and the diameter of the through hole is greater than the outer diameter of the vertical rod (63).

8. The lubricating oil viscosity detection device according to claim 5, characterized in that: The limiting member (8) comprises a connecting tube (81) fixedly arranged on the outside of the fixing tube (9); a fixing ring (82) is fixedly arranged inside the bottom end of the connecting tube (81); a supporting spring (83) is arranged on the fixing ring (82); a pressing rod (84) is arranged on the top end of the supporting spring (83); the pressing rod (84) is slidably arranged at the end of the connecting tube (81); a U-shaped tube (85) is slidably arranged inside the other end of the connecting tube (81); the end of the U-shaped tube (85) is fixedly connected to a limiting rod (86); the end of the limiting rod (86) passes through the fixing tube (9); when the bottom plate (62) moves upward relative to the fixing tube (9), the supporting spring (83) drives the pressing rod (84) to move upward, and then the U-shaped tube (85) moves toward the inside of the connecting tube (81) under the action of air pressure.

9. The lubricating oil viscosity detection device according to claim 8, characterized in that: The bottom end of the vertical rod (63) is rotatably arranged on the bottom plate (62), and the top end of the vertical rod (63) is rotatably arranged to penetrate the top plate (61). A cavity is provided inside the top end of the vertical rod (63), and a moving block (12) is movably arranged in the cavity. A fixing spring (13) is provided at the bottom end of the moving block (12). The top of the moving block (12) penetrates the vertical rod (63) and is connected to the connecting ring (10). A plurality of rotating shafts (14) are rotatably arranged on the outside of the vertical rod (63). One end of the rotating shaft (14) extends into the cavity, and a baffle (15) is fixedly arranged at one end of the rotating shaft (14). A gear (16) is provided at one end of the rotating shaft (14) located in the cavity, and a rack (17) meshing with the gear (16) is provided at the bottom of the moving block (12).

10. The lubricating oil viscosity detection device according to claim 1, characterized in that: A heating wire is arranged in the fixing cylinder (9).

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