A device for detecting the viscosity of lubricating oil

Abstract

The present application belongs to the technical field of viscosity detection device, and discloses a lubricating oil viscosity detection device, which comprises a base, a viscosity detector and a water bath cylinder are arranged on the top of the base, a sealing cover is arranged on the top of the water bath cylinder, and a plurality of detection holes are arranged on the top of the sealing cover. The positioning assembly is arranged, when the suction disc at the bottom of the positioning sleeve contacts with the inner wall of the water bath cylinder during the process that the capillary viscometer is inserted into the water bath, the top end of the suction disc can be blocked under the cooperation of the compression spring, the inserting rod and the sealing rubber ring, and the air in the suction disc can be pressed out along the bottom of the suction disc, so that the stable connection between the suction disc and the inner wall of the bottom of the water bath cylinder is realized, and the bottom end of the capillary viscometer is limited during the detection process, so that the capillary viscometer is prevented from being affected by water flow fluctuation, and the detection precision is improved.

Description

Technical Field

[0001] This invention belongs to the technical field of viscosity testing devices, and particularly relates to a lubricating oil viscosity testing device. Background Technology

[0002] Lubricating oil viscosity testing devices are professional instruments used to accurately measure the physical properties of lubricating oil viscosity. Their core function is to obtain flow resistance data of lubricating oil under specific temperature, pressure or shear conditions through standardized methods, providing key basis for lubricating oil quality control, performance evaluation, equipment matching and failure analysis.

[0003] Existing lubricating oil viscosity testing devices primarily use laser probes to detect the viscosity of lubricating oil by measuring the time it takes for the oil to flow through a capillary viscometer. However, in actual testing, to measure the viscosity of lubricating oil at different temperatures, the capillary viscometer needs to be placed in a water bath for heating. During heating, to ensure a uniform water temperature in the water bath, a stirring device is generally required to agitate the water. However, when the capillary viscometer is inserted into the water bath, the lack of a positioning device at the bottom of the viscometer means that the agitated water will cause the capillary viscometer to vibrate, thus affecting the accuracy of the laser probe's detection.

[0004] Therefore, it is necessary to invent a lubricating oil viscosity testing device to solve the above problems. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a lubricating oil viscosity detection device to solve the issues raised in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A lubricating oil viscosity testing device includes a base, a viscometer and a water bath on the top of the base, a sealing cover on the top of the water bath, and multiple detection holes through the top of the sealing cover. Each detection hole contains either a heat-insulating cover or a detection component for testing the lubricating oil. The detection component includes a sealing element, a capillary viscometer, a locking element, and a positioning component. The sealing element is threaded into the detection holes, the capillary viscometer is inserted through the sealing element, the locking element is connected to the sealing element and sleeved on one end of the capillary viscometer for fixing the capillary viscometer, and the positioning component is connected between the bottom of the capillary viscometer and the inner wall of the bottom of the water bath for restricting the bottom end of the capillary viscometer.

[0008] Furthermore, the sealing element includes a threaded ring, a fixed cap, a rotating ring, a fixing strip, and an adjusting screw. The threaded ring is threadedly inserted into the detection hole. The fixed cap is slidably inserted into the inner side of the threaded ring. The rotating ring is rotatably connected to the inner wall of the opening at the top of the threaded ring. The fixing strip is horizontally fixedly connected to the inner side of the rotating ring and is located in the gap between the two ends of the capillary viscometer. The adjusting screw is vertically threaded through and inserted into the fixing strip, and the bottom end of the adjusting screw is rotatably connected to the middle position of the top of the fixed cap.

[0009] Furthermore, the locking component includes a locking block and a locking screw. The locking block is slidably sleeved on one end of the capillary viscometer, and the bottom of the locking block is detachably connected to the top of the fixing cover. The locking screw is horizontally threaded into the side of the locking block, and the locking screw can contact the surface of the capillary viscometer.

[0010] Furthermore, the positioning assembly includes a positioning sleeve, a U-shaped clamp, a locking pin, and an adsorption mechanism. The positioning sleeve is detachably fitted onto the bottom of the capillary viscometer, and a vertical positioning hole is provided through the positioning sleeve at the position where the gaps at both ends of the capillary viscometer are directly opposite. The U-shaped clamp is slidably installed inside the positioning sleeve in a vertical direction, with the opening of the U-shaped clamp facing upward. The U-shaped clamp is elastic, and the bottom end of the capillary viscometer is inserted into the U-shaped clamp. The locking pin is inserted through the U-shaped clamp in a horizontal direction, with both ends of the locking pin located in the two positioning holes respectively. The adsorption mechanism is connected to the bottom of the positioning sleeve and is used to adsorb and connect the positioning sleeve to the inside of the bottom of the water bath.

[0011] Furthermore, the adsorption mechanism includes a connecting tube, a suction cup, an insert rod, a sealing ring, a sealing rubber ring, and a compression spring. The connecting tube is rotatably connected to the bottom center of the positioning sleeve, and a connecting hole is provided through the positioning sleeve at the position directly opposite the connecting tube. The suction cup is fixedly connected to the bottom of the connecting tube, and the bottom space of the suction cup communicates with the inner area of ​​the connecting tube. The insert rod is vertically fixedly connected to the bottom of the U-shaped clamp and inserted into the connecting hole. The sealing ring is fixedly connected to the inner wall of the connecting tube, and the diameter of the insert rod matches the inner diameter of the sealing ring. The sealing rubber ring is fixedly sleeved on the insert rod, and when the bottom end of the insert rod is inserted into the inner side of the sealing ring, the outer surface of the sealing rubber ring is tightly pressed against the connection between the connecting tube and the positioning sleeve. The compression spring is fixedly connected to the bottom of the sealing ring, and the compression spring and the sealing ring are coaxial. An annular rubber pad is fixedly connected to the bottom of the compression spring.

[0012] Furthermore, the bottom of the U-shaped clamp is fixedly connected with an annular protrusion coaxial with the sealing ring, and when the bottom of the U-shaped clamp is in contact with the inner wall of the bottom of the positioning sleeve, the annular protrusion can be inserted into the inner wall of the bottom of the positioning sleeve to cooperate with the sealing ring to seal the connection hole.

[0013] Furthermore, the lubricating oil viscosity testing device also includes a heating rod, a stirring rod, stirring blades, a motor, a protective cover, and laser detection heads. The heating rod is vertically inserted into the sealing cover, and the stirring rod is vertically rotatably inserted into the sealing cover. The motor is driven and connected to the top of the stirring rod, and both the motor and the heating rod are electrically connected to the viscosity meter. There are multiple sets of stirring blades, which are fixedly connected to the surface of the stirring rod from top to bottom, and the stirring blades can push water downwards. The protective cover is fitted around the stirring rod, and the side wall of the protective cover has a hollow design. Several dense small holes are evenly opened through the bottom of the protective cover. The side of the protective cover near the bottom is recessed inward to form an annular groove. The number of laser detection heads is the same as the number of detection holes, and multiple laser detection heads are installed in the annular groove.

[0014] Furthermore, an impeller is rotatably mounted on the bottom of the protective cover, the diameter of which matches the diameter of the bottom of the protective cover, and the blades of the impeller are helical.

[0015] Furthermore, the capillary viscometer includes a coarse section and a fine section, which are connected together by a buffer ball. The locking block is sleeved on the fine section. A liquid storage ball and a measuring ball are arranged on the fine section from top to bottom, and the liquid storage ball and the measuring ball are connected together by a capillary glass tube. A rubber ball for air intake is detachably connected to the top of the fine section.

[0016] The technical effects and advantages of this invention are as follows:

[0017] 1. This invention, by incorporating a positioning component, allows the capillary viscometer to be inserted into a water bath. When the suction cup at the bottom of the positioning sleeve contacts the inner wall of the water bath, the top of the suction cup is blocked by the combined action of the compression spring, the insertion rod, and the sealing ring. Meanwhile, the air inside the suction cup is forced out along the bottom of the suction cup, thereby achieving a stable connection between the suction cup and the bottom inner wall of the water bath. This restricts the bottom of the capillary viscometer during the detection process, preventing the capillary viscometer from being affected by water flow fluctuations and improving detection accuracy.

[0018] 2. When the viscosity of lubricating oil is tested at different temperatures, the present invention, with the rotation of the stirring blade, can push the water downward, so that the water can pass through the dense small holes at the bottom of the protective cover. This allows the downward water flow to be evenly divided into fine micro-flows, reducing the vibration generated when the water is stirred. When the downward micro-flows act on the impeller, the micro-flows can drive the impeller to rotate slowly, thereby converting the kinetic energy of the water into the kinetic energy of the impeller. This reduces the influence of the kinetic energy of the water flow on the capillary viscometer and improves the detection accuracy of the laser detection head. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a three-dimensional schematic diagram of the sealing cover, heat preservation cover, and detection components in this invention;

[0021] Figure 3 This is a three-dimensional sectional view of the protective cover in this invention;

[0022] Figure 4 This is a three-dimensional schematic diagram of the capillary viscometer, the detection component, and the rubber ball (31) in this invention;

[0023] Figure 5 This is a three-dimensional schematic diagram of the capillary viscometer in this invention;

[0024] Figure 6 This is a three-dimensional schematic diagram of the sealing element in this invention;

[0025] Figure 7 This is a three-dimensional sectional view of the positioning component in this invention.

[0026] In the diagram: 1. Base; 2. Viscometer; 3. Water bath; 4. Sealing cap; 5. Insulation cap; 6. Capillary viscometer; 61. Buffer ball; 62. Liquid storage ball; 63. Measuring ball; 64. Capillary glass tube; 7. Threaded ring; 8. Fixing cap; 9. Rotary ring; 10. Fixing strip; 11. Adjusting screw; 12. Locking block; 13. Locking screw; 14. Positioning sleeve; 15. U-shaped clamp; 16. Locking pin; 17. Connecting pipe; 18. Suction cup; 19. Insert rod; 20. Sealing ring; 21. Sealing rubber ring; 22. Compression spring; 23. Annular protrusion; 24. Heating rod; 25. Stirring rod; 26. Stirring blade; 27. Motor; 28. Protective cover; 29. ​​Laser detection head; 30. Impeller; 31. Rubber ball. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0028] This invention provides, for example Figures 1 to 7 The lubricating oil viscosity testing device shown includes a base 1, a viscosity meter 2 and a water bath 3 on the top of the base 1, a sealing cover 4 on the top of the water bath 3 to seal it, and multiple detection holes through the top of the sealing cover 4. A heat-insulating cover 5 or a detection component for testing the lubricating oil is installed in each detection hole. The detection component includes a sealing element, a capillary viscometer 6, a locking element, and a positioning component. The sealing element is threaded into the detection hole, the capillary viscometer 6 is inserted through the sealing element, the locking element is connected to the sealing element and sleeved on one end of the capillary viscometer 6 to fix the capillary viscometer 6, and the positioning component is connected between the bottom of the capillary viscometer 6 and the inner wall of the bottom of the water bath 3 to restrict the bottom end of the capillary viscometer 6.

[0029] The locking component includes a locking block 12 and a locking screw 13. The locking block 12 is slidably sleeved on one end of the capillary viscometer 6, and the bottom of the locking block 12 is detachably connected to the top of the fixed cover 8. The locking screw 13 is horizontally threaded into the side of the locking block 12, and the locking screw 13 can contact the surface of the capillary viscometer 6.

[0030] When testing lubricating oil, the capillary viscometer 6 is first inserted into the seal from bottom to top. Then, the locking screw 13 is turned to lock the capillary viscometer 6. Next, the positioning component is fitted onto the bottom of the capillary viscometer 6. Then, one of the heat insulation covers 5 is removed, and the capillary viscometer 6 with the positioning component is inserted into the open detection hole. During the downward insertion of the capillary viscometer 6, when the seal contacts the detection hole, the seal can be rotated to connect the seal to the sealing cover 4. After the connection is completed, the seal can be adjusted to move the capillary viscometer 6 downward. When the positioning component at the bottom of the capillary viscometer 6 contacts the inner wall of the bottom of the water bath 3, the positioning component can adhere to the inner wall of the bottom of the water bath 3, thereby restricting the bottom of the capillary viscometer 6 and ensuring that the capillary viscometer 6 is not affected by water flow fluctuations during the testing process, thus improving the testing accuracy.

[0031] like Figures 1 to 7 As shown, the sealing component includes a threaded ring 7, a fixed cover 8, a rotating ring 9, a fixing strip 10, and an adjusting screw 11. The threaded ring 7 is threadedly inserted into the detection hole. The fixed cover 8 is slidably inserted into the inner side of the threaded ring 7. The rotating ring 9 is rotatably connected to the inner wall of the opening at the top of the threaded ring 7. The fixing strip 10 is horizontally fixedly connected to the inner side of the rotating ring 9, and the fixing strip 10 is located in the gap between the two ends of the capillary viscometer 6. The adjusting screw 11 is vertically threaded through and inserted into the fixing strip 10, and the bottom end of the adjusting screw 11 is rotatably connected to the middle position of the top of the fixed cover 8.

[0032] The positioning assembly includes a positioning sleeve 14, a U-shaped clamp 15, a locking pin 16, and an adsorption mechanism. The positioning sleeve 14 is detachably fitted onto the bottom of the capillary viscometer 6, and a vertical positioning hole is provided through the positioning sleeve 14 at the position where the gaps at both ends of the capillary viscometer 6 are directly opposite. The U-shaped clamp 15 is slidably installed inside the positioning sleeve 14 in the vertical direction, and the opening of the U-shaped clamp 15 faces upward. The U-shaped clamp 15 is elastic, and the bottom end of the capillary viscometer 6 is inserted into the U-shaped clamp 15. The locking pin 16 is inserted through the U-shaped clamp 15 in the horizontal direction, and the two ends of the locking pin 16 are respectively located in the two positioning holes. The adsorption mechanism is connected to the bottom of the positioning sleeve 14 and is used to adsorb and connect the positioning sleeve 14 to the bottom of the water bath 3.

[0033] The adsorption mechanism includes a connecting tube 17, a suction cup 18, an insertion rod 19, a sealing ring 20, a sealing rubber ring 21, and a compression spring 22. The connecting tube 17 is rotatably connected to the bottom center of the positioning sleeve 14, and a connecting hole is provided through the positioning sleeve 14 at the position directly opposite the connecting tube 17. The suction cup 18 is fixedly connected to the bottom of the connecting tube 17, and the bottom space of the suction cup 18 communicates with the inner area of ​​the connecting tube 17. The insertion rod 19 is vertically fixedly connected to the bottom of the U-shaped clamp 15, and the insertion rod 19 is inserted into the connecting hole. The sealing ring 20 is fixedly connected to the inner wall of the connecting pipe 17, and the diameter of the insert rod 19 matches the inner diameter of the sealing ring 20. The sealing rubber ring 21 is fixedly sleeved on the insert rod 19, and when the bottom end of the insert rod 19 is inserted into the inner side of the sealing ring 20, the outer side of the sealing rubber ring 21 is tightly attached to the connection between the connecting pipe 17 and the positioning sleeve 14. The compression spring 22 is fixedly connected to the bottom of the sealing ring 20, and the compression spring 22 is coaxial with the sealing ring 20. An annular rubber pad is fixedly connected to the bottom of the compression spring 22.

[0034] The bottom of the U-shaped clamp 15 is fixedly connected to an annular protrusion 23 coaxial with the sealing ring 20. When the bottom of the U-shaped clamp 15 is in contact with the inner wall of the bottom of the positioning sleeve 14, the annular protrusion 23 can be inserted into the inner wall of the bottom of the positioning sleeve 14 to cooperate with the sealing ring 21 to seal the connection hole.

[0035] With the positioning component in place, the capillary viscometer 6 is first inserted into the fixing cover 8 from bottom to top and locked by the locking element. Then, the bottom end of the capillary viscometer 6 is inserted into the positioning sleeve 14 from top to bottom. As the bottom end of the capillary viscometer 6 is gradually inserted into the positioning sleeve 14, it is clamped by the U-shaped clamp 15. When the bottom of the capillary viscometer 6 is pressed tightly against the inner wall of the bottom of the U-shaped clamp 15, the locking pin 16 is inserted into the U-shaped clamp 15, thus completing the connection operation between the U-shaped clamp 15 and the capillary viscometer 6. Then, the capillary viscometer 6 with the positioning sleeve 14 is... The capillary viscometer 6 is inserted into the water bath 3 through the detection hole. When the threaded ring 7 contacts the detection hole, the threaded ring 7 is turned to connect the threaded ring 7 to the sealing cover 4. After the threaded ring 7 is connected to the sealing cover 4, the suction cup 18 at the bottom of the positioning sleeve 14 has not yet contacted the inner wall of the bottom of the water bath 3. Then the fixing cover 8 is rotated to drive the capillary viscometer 6, thereby adjusting the position to be detected of the capillary viscometer 6. During the adjustment process, when the fixing strip 10 contacts the capillary viscometer 6, the fixing strip 10 can drive the rotating ring 9 to rotate together under the push of the capillary viscometer 6.

[0036] After adjustment, while holding the capillary viscometer 6 in place by hand, turn the adjusting screw 11 to push the fixing cover 8 downwards. During this process, the capillary viscometer 6 can drive the suction cup 18 and the compression spring 22 at the bottom of the positioning sleeve 14 to gradually approach the inner wall of the bottom of the water bath 3. When the suction cup 18 contacts the inner wall of the bottom of the water bath 3, it can gradually expel the air inside under the squeezing action, thus gradually adsorbing itself onto the inner wall of the bottom of the water bath 3. When the compression spring 22 contacts the inner wall of the bottom of the water bath 3, it can be gradually compressed under the pressure. The reverse action of the compression spring 22... Force can stably insert the rod 19 into the sealing ring 20, while the sealing ring 21 can be located at the connection between the connecting tube 17 and the positioning sleeve 14, thereby sealing the top of the connecting tube 17. At the same time, as the U-shaped clamp 15 moves downward, its bottom annular protrusion 23 can be inserted into the bottom inner wall of the positioning sleeve 14, thereby working with the sealing ring 21 to improve the sealing effect on the top of the connecting tube 17, ensuring that the suction cup 18 is stably adsorbed to the bottom inner wall of the water bath 3 and restricting the bottom of the capillary viscometer 6, thereby ensuring that the capillary viscometer 6 is not affected by water flow fluctuations during the detection process and improving the detection accuracy.

[0037] After the test is completed, as the adjusting screw 11 is turned in the opposite direction, the fixed cover 8 can move the capillary viscometer 6 upward under the pull of the adjusting screw 11. As the capillary viscometer 6 moves downward, it can pull the U-shaped clamp 15 upward through the locking pin 16. As the U-shaped clamp 15 moves upward, the insertion rod 19 and the sealing ring 21 can gradually move out of the connecting tube 17 under the action of the U-shaped clamp 15. At the same time, the annular protrusion 23 can also gradually separate from the bottom inner wall of the positioning sleeve 14. When the top of the connecting tube 17 is opened, the water in the water bath 3 can enter the inside of the suction cup 18 through the top of the connecting tube 17. With the upward elastic force of the compression spring 22, the suction cup 18 can be smoothly separated from the bottom inner wall of the water bath 3, which makes it easier to remove the capillary viscometer 6 from the water bath 3.

[0038] In addition, by providing a U-shaped clamp 15, during the process of inserting the positioning sleeve 14 into or removing the capillary viscometer 6 from the bottom end of the capillary viscometer 6, the elastic U-shaped clamp 15 can move together with the capillary viscometer 6, thereby avoiding the friction force of the inner wall of the positioning sleeve 14 on the bottom end of the capillary viscometer 6, and thus ensuring that the bottom end of the capillary viscometer 6 is not worn.

[0039] like Figures 2 to 5 As shown, the capillary viscometer 6 includes a coarse section and a fine section. A rubber ball 31 for air intake is detachably connected to the top of the fine section. The coarse and fine sections are connected together by a buffer ball 61. A locking block 12 is fitted onto the fine section. A liquid storage ball 62 and a measuring ball 63 are arranged from top to bottom on the fine section, and the liquid storage ball 62 and the measuring ball 63 are connected together by a capillary glass tube 64. The lubricating oil viscosity detection device also includes a heating rod 24, a stirring rod 25, a stirring blade 26, a motor 27, a protective cover 28, and a laser detection head 29. The heating rod 24 is vertically inserted into the sealing cover 4, and the stirring rod 25 is vertically rotatably inserted into the sealing cover 4. The motor 27 is driven and connected to the top of the stirring rod 25, and the motor 27 and the heating rod 25 are connected together. All rods 24 are electrically connected to the viscosity meter 2. There are multiple sets of stirring blades 26, which are fixedly connected to the surface of the stirring rod 25 from top to bottom. The stirring blades 26 can push water downward. The protective cover 28 is fitted around the stirring rod 25. The side wall of the protective cover 28 is hollowed out, and several dense small holes are evenly opened through the bottom of the protective cover 28. The side of the protective cover 28 near the bottom is recessed inward to form an annular groove. The number of laser detection heads 29 is the same as the number of detection holes, and multiple laser detection heads 29 are installed in the annular groove. An impeller 30 is rotatably installed at the bottom of the protective cover 28. The diameter of the impeller 30 matches the diameter of the bottom of the protective cover 28, and the blades of the impeller 30 are spiral.

[0040] Before testing the lubricating oil, after screwing the threaded ring 7 into the test hole, rotating the fixing cap 8 will rotate the capillary viscometer 6, ensuring that the capillary glass tube 64 on the capillary viscometer 6 is aligned with the laser detection head 29 on the protective cover 28. Then, turning the adjusting screw 11 will restrict the bottom of the capillary viscometer 6 to be held in place by the suction cup 18 and the compression spring 22. During testing, the lubricating oil added to the capillary viscometer 6 is pushed out of the capillary viscometer 6 using the rubber ball 31. After the lubricating oil is drawn into the reservoir ball 62 and measuring ball 63 of the capillary viscometer 6 at the bottom inner wall position, as the rubber ball 31 is removed from the top of the thin section, the lubricating oil in the reservoir ball 62 can gradually drip into the measuring ball through the capillary glass tube 64 under the action of gravity. During this process, the laser detection head 29 can detect the time it takes for the lubricating oil to completely drip from the reservoir ball 62 into the measuring ball 63. The detected data can then be transmitted to the viscosity meter 2 for analysis to obtain the viscosity value of the lubricating oil.

[0041] To test the viscosity of lubricating oil at different temperatures, the heating rod 24 and motor 27 can be activated by the viscosity meter 2. As the heating rod 24 is activated, it can heat the water in the water bath 3 to a specified temperature as needed, thereby enabling the viscosity test of the lubricating oil at different temperatures. During the operation of the heating rod 24, the stirring blade 26 can rotate under the drive of the stirring rod 25. As the stirring blade 26 rotates, it can push the water downward, allowing the water to pass through the dense small holes at the bottom of the protective cover 28. This allows the downward water flow to be evenly divided into fine micro-flows, reducing the vibration generated when the water is agitated. When the downward micro-flows act on the impeller 30, they can drive the impeller 30 to rotate slowly, thereby converting the kinetic energy of the water into the kinetic energy of the impeller 30. This reduces the influence of the water kinetic energy on the capillary viscometer 6 and improves the detection accuracy of the laser detection head 29.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. A lubricating oil viscosity detection device characterized by: The utility model provides a viscosity detection device, including base (1), the top of base (1) is provided with viscosity detector (2) and water bath cylinder (3), the top of water bath cylinder (3) is provided with the sealing cover (4) sealed to it, the top of sealing cover (4) is passed through and is set up with a plurality of detection holes, the detection hole is provided with the detection assembly for detecting lubricating oil, the detection assembly includes sealing, capillary viscosimeter (6), locking piece and positioning assembly, sealing is screwed in the detection hole, capillary viscosimeter (6) is inserted on sealing, locking piece is connected on sealing, and locking piece is sleeved on one end of capillary viscosimeter (6), is used for fixing capillary viscosimeter (6), the bottom of capillary viscosimeter (6) is connected between the bottom inner wall of water bath cylinder (3), is used for limiting the bottom end of capillary viscosimeter (6), The positioning assembly includes positioning sleeve (14), U-shaped clamp block (15), locking pin (16) and adsorption mechanism, the adsorption mechanism includes connecting pipe (17), suction cup (18), plug rod (19), sealing ring (20), sealing rubber ring (21) and compression spring (22), connecting pipe (17) rotationally connected in the middle position of the bottom of positioning sleeve (14), and the position of positioning sleeve (14) and connecting pipe (17) opposite is passed through and is set up with connecting hole, suction cup (18) is fixedly connected at the bottom of connecting pipe (17), and the bottom space of suction cup (18) is communicated with the inner side area of connecting pipe (17), plug rod (19) is fixedly connected vertically at the bottom of U-shaped clamp block (15), and plug rod (19) is inserted in connecting hole, sealing ring (20) is fixedly connected on the inner wall of connecting pipe (17), and the diameter of plug rod (19) matches the inner diameter of sealing ring (20), sealing rubber ring (21) is fixedly sleeved on plug rod (19), and when the bottom end of plug rod (19) is inserted in the inner side of sealing ring (20), the outer side surface of sealing rubber ring (21) is tightly attached together with the connection of connecting pipe (17) and positioning sleeve (14), compression spring (22) is fixedly connected at the bottom of sealing ring (20), and compression spring (22) and sealing ring (20) are coaxial, the bottom of compression spring (22) is fixedly connected with annular rubber pad; The bottom of U-shaped clamp block (15) is fixedly connected with annular protrusion (23) coaxial with sealing ring (20), and when the bottom of U-shaped clamp block (15) and the bottom inner wall of positioning sleeve (14) are attached together, annular protrusion (23) can be inserted on the bottom inner wall of positioning sleeve (14), for sealing connecting hole in cooperation with sealing rubber ring (21) The positioning sleeve (14) is detachably sleeved at the bottom of the capillary viscometer (6), vertical positioning holes are arranged at the positions where the positioning sleeve (14) and the gaps opposite to the two ends of the capillary viscometer (6) are located, the U-shaped clamp block (15) is slidably arranged inside the positioning sleeve (14) in the vertical direction, the opening of the U-shaped clamp block (15) faces upward, the U-shaped clamp block (15) is elastic, the bottom end of the capillary viscometer (6) is inserted into the U-shaped clamp block (15), the locking pin (16) is inserted into the U-shaped clamp block (15) in the horizontal direction, and the two ends of the locking pin (16) are located in the two positioning holes respectively, the suction mechanism is connected to the bottom of the positioning sleeve (14) and is used for suction connecting the positioning sleeve (14) and the inside of the bottom of the water bath cylinder (3).

2. The lubricating oil viscosity detection device according to claim 1, characterized by: The sealing member comprises a threaded ring (7), a fixed cover (8), a rotating ring (9), a fixed strip (10) and an adjusting screw (11), the threaded ring (7) is threaded and inserted into the detection hole, the fixed cover (8) is slidably inserted into the inside of the threaded ring (7), the rotating ring (9) is rotationally connected to the inner wall of the top opening of the threaded ring (7), the fixed strip (10) is horizontally and fixedly connected to the inside of the rotating ring (9), and the fixed strip (10) is located in the gap between the two ends of the capillary viscometer (6), the adjusting screw (11) is vertically and threadedly inserted into the fixed strip (10), and the bottom end of the adjusting screw (11) is rotationally connected to the middle position of the top of the fixed cover (8).

3. The lubricating oil viscosity detection device according to claim 2, characterized by: The locking member comprises a locking block (12) and a locking screw (13), the locking block (12) is slidably sleeved at one end of the capillary viscometer (6), and the bottom of the locking block (12) is detachably connected to the top of the fixed cover (8), the locking screw (13) is horizontally and threadedly inserted into the side surface of the locking block (12), and the locking screw (13) can be in contact with the surface of the capillary viscometer (6).

4. The lubricating oil viscosity detection device according to claim 3, characterized by: The lubricating oil viscosity detection device further comprises a heating rod (24), a stirring rod (25), stirring blades (26), a motor (27), a protective cover (28) and a laser detection head (29), the heating rod (24) is vertically inserted through the sealing cover (4), the stirring rod (25) is vertically rotatably inserted through the sealing cover (4), the motor (27) is drivingly connected to the top end of the stirring rod (25), and the motor (27) and the heating rod (24) are electrically connected together, the number of the stirring blades (26) is multiple groups, the multiple groups of stirring blades (26) are fixedly connected to the surface of the stirring rod (25) from top to bottom, and the stirring blades (26) can push water downward, the protective cover (28) is sleeved on the periphery of the stirring rod (25), the sidewall of the protective cover (28) is designed as a hollow structure, a plurality of dense small holes are uniformly and penetratingly formed in the bottom of the protective cover (28), the side surface of the protective cover (28) close to the bottom is recessed inward to form an annular groove, the number of the laser detection head (29) is the same as that of the detection holes, and the plurality of laser detection heads (29) are installed in the annular groove.

5. The lubricating oil viscosity detection device according to claim 4, characterized by: The bottom of the protective cover (28) is rotatably provided with an impeller (30), the diameter of the impeller (30) is matched with the diameter of the bottom of the protective cover (28), and the blades of the impeller (30) are helical.

6. The lubricating oil viscosity detection device according to claim 5, characterized by: The capillary tube viscometer (6) comprises a thick segment and a thin segment, the thick segment and the thin segment are connected together through a buffer ball (61), the locking block (12) is sleeved on the thin segment, the thin segment is provided with a liquid storage ball (62) and a measuring ball (63) from top to bottom, the liquid storage ball (62) and the measuring ball (63) are connected together through a capillary glass tube (64), and the top end of the thin segment is detachably connected with a rubber ball (31) for inhaling air.

Images