Lubricating oil blending device and method

Abstract

The invention discloses a lubricating oil blending device and method, and relates to the technical field of lubricating oil production, the lubricating oil blending device comprises a branch pipe, a mixing pipe, a buffer mechanism, a material tank and a mixing tank, the buffer mechanism comprises a valve body, a central square pipe, a drainage plate, a transmission shaft, a backflow plate and a flow baffle; the valve body is fixed between the branch pipe and the mixing pipe; the central square tube is fixed in the middle of the valve body; a plurality of flexible layers are arranged in the middle of the central square pipe at intervals, when the flow velocity or flow of fluid in the central square pipe is too large, the flexible layers expand to extrude the upper flow channel and the lower flow channel, and therefore the input flow of the fluid in the flow channels is controlled, and sensitivity is improved. The drainage plate is fixed between the valve body and the central square tube through a transmission shaft and is positioned on the same vertical line with the backflow plate; the technical effects that the shape and the size of the central square tube are diversified, property changes of different fluids can be adapted in time, the vibration reduction performance is improved, the sensitivity of the system to the fluid change is improved, and production and manufacturing are facilitated are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of lubricating oil production, and in particular to a lubricating oil blending device and method. Background Art

[0002] The lubricant blending process refers to the process of mixing different types or brands of lubricants together to obtain the desired performance when using lubricants. This operation usually adjusts and improves the performance of lubricants according to specific needs or conditions, such as improving lubrication performance, reducing friction, and enhancing wear resistance, etc., to ensure that the equipment is well lubricated and protected during operation. In actual operation, people can mix lubricants based on different base oils and additives to obtain the best formula that is more suitable for specific application needs.

[0003] Regarding the blending of lubricating oil, the Chinese invention patent with patent number CN115920687B discloses a lubricating oil delivery device and blending method, including a branch pipe and a mixing pipe, wherein multiple branch pipes can controllably deliver fluid substances to the mixing pipe, so that multiple fluid substances can be mixed in the process of directional flow along the mixing pipe, and the mixing pipe is provided with multiple sections of alternatingly connected main pipes and parallel branch pipes in a manner of periodically separating and combining fluid substances, so as to form a corrugated pipeline structure with multiple alternating forks and convergences, forcing the fluid substances to continuously change the fluid state while directional flow occurs in the mixing pipe, so that multiple fluid substances delivered to the mixing pipe by different branch pipes are mixed in the corrugated pipeline structure. The invention can complete the mixing of multiple fluid substances while delivering lubricating oil, improve production efficiency and production quality, and reduce production costs.

[0004] Although the above scheme can adjust the flow rate to a certain extent through the buffer mechanism during the delivery and blending process of the lubricating oil, in actual use, due to the single size and certain rigidity of the central square tube, it is difficult to accurately and timely control the fluid flow rate when the fluid properties change greatly. In addition, the rigid central square tube is easily affected by vibration, resulting in the system's low sensitivity to fluid changes. It is unable to make real-time adjustments according to different flow rates and flow velocities under different pressures, and cannot meet the blending requirements of different proportions of lubricating oils with different performances, which is not conducive to daily production and manufacturing. Summary of the invention

[0005] The present application solves the technical problems in the prior art that the central square tube has a single size, cannot adapt to changes in the properties of different fluids in a timely manner, has poor vibration damping, has a low sensitivity of the system to changes in fluid quality, and is not conducive to production and manufacturing by providing a lubricating oil blending device and method. The application achieves the technical effect that the central square tube has a variety of shapes and sizes, can adapt to changes in the properties of different fluids in a timely manner, has improved vibration damping, has improved sensitivity of the system to changes in fluid quality, and is conducive to production and manufacturing.

[0006] The present application provides a lubricating oil blending device, including a branch pipe for conveying different lubricating oil fluids, a mixing pipe for conveying and mixing various base oils and additive fluids, a buffer mechanism for regulating the flow of different fluids, and a material tank and a mixing tank for containing fluids with different characteristics; The buffer mechanism includes a valve body, a central square tube, a guide plate, a transmission shaft, a return plate and a baffle plate; The valve body is fixed between the branch pipe and the mixing pipe and is used to drive the fluid to be transported; The central square tube is fixed in the middle of the valve body and is used to separate different fluids and transport lubricating oil fluid; A plurality of flexible layers are arranged at intervals in the middle of the central square tube. When the flow velocity or flow rate of the fluid inside the central square tube is too large, the flexible layers expand and squeeze the upper and lower flow channels, thereby controlling the input flow rate of the fluid in each flow channel and improving the sensitivity. The return plate and the baffle plate are fixed in sequence from left to right in the central square tube cavity through the rotating shaft, and are used to control the flow rate of the fluid in the central square tube; The guide plate is fixed between the valve body and the central square tube through a transmission shaft and is in the same vertical line as the return plate, and is used to cooperate with the return plate and the baffle plate to jointly control the flow of each fluid.

[0007] Furthermore, the flexible layer is an airbag structure having two layers, an inner layer and an outer layer; The inner layer is fixed to the outer side wall of the central square tube and communicates with it; The outer layer is fixed to the outer side wall of the central square tube and is located outside the inner layer; A gap is left between the inner layer and the outer layer, and the interior is connected to an air pump through a pipeline. The elasticity and ductility of the flexible layer in an expanded state are adjusted by controlling the internal inflation amount.

[0008] Furthermore, the volume of the flexible layer fully expanded under the action of fluid flow is 2 to 4 times that of the initial state; the elasticity of the flexible layer between the inner layer and the outer layer when fully filled with gas is 0.5 to 0.8 times that of the initial state.

[0009] Furthermore, expansion zones are formed between the flexible layer and the valve body, and a response mechanism is fixed inside each expansion zone. The response mechanism includes a gear, a rack and a response blade; There are multiple gears, which are evenly fixed on the inner wall of the valve body through rotating shafts; the gear located on the far right and close to the mixing pipe is fixed on the transmission shaft; The rack is an annular structure, meshing with each gear through meshing transmission, and is used to drive the guide plate to rotate synchronously, thereby further controlling the flow rate according to the flow rate and sensitivity, and realizing the system's regulation of different fluid qualities; There are multiple response blades, all fixed under the corresponding rotating shaft, which are used to shorten the response feedback time of the guide plate to the flow velocity of the fluid and cooperate with the gear and rack to drive the guide plate to rotate, thereby improving sensitivity.

[0010] Furthermore, a flexible tube cooperating with the response blade is slidably connected in the expansion area through magnetic attraction, and is used to push the response blade to rotate at an angle in the expansion state, thereby further controlling the angular rotation of the guide plate.

[0011] Furthermore, the flexible tube is made of rubber, and the diameter of the open end thereof in the expanded state is 3 to 4 times that in the initial state.

[0012] Furthermore, the diameter of the tail end of the flexible tube in the expanded state is 1.2 to 1.5 times that in the initial state.

[0013] Furthermore, a square ring magnet is fixed to the open end of the flexible tube to fix the position of the flexible tube inside the expansion zone.

[0014] Furthermore, an electromagnet cooperating with a square annular magnet is slidably connected to the outer wall of the valve body, and is used to control the relative position of the flexible tube and the response blade through magnetic attraction, thereby further controlling the sensitivity of the system to the flow rate of the fluid.

[0015] In addition, the technical solution of the present invention also provides a lubricating oil blending method, the specific steps are as follows: Step 1: connect the output ends of the branch pipe and the mixing pipe with the mixing and blending material tank and the mixing tank, and connect the input and output ends of the buffer mechanism with the corresponding branch pipes and material tanks; Step 2: Adjust the flow channels and connection positions of different fluids according to production blending requirements, and introduce different fluids into the valve body and the central square tube according to the blending requirements; Step 3: After different fluids are introduced into the valve body and the central square tube, when the velocity or flow rate of the fluid inside the central square tube is too large, the flexible layer expands and squeezes the different fluids in the upper and lower flow channels, so that the velocity and flow rate of the different fluids in the upper and lower flow channels change accordingly with the flow rate of the fluid inside the central square tube, thereby controlling the input flow rate of the fluid in each flow channel and improving the sensitivity. At the same time, the guide plate deflects in different sizes according to the flow rate of the fluid flow, thereby driving the return plate and the baffle plate to rotate, so that the return plate and the baffle plate adjust the actual conductance inside the central square tube, and they are linked to each other to achieve overall flow regulation; Step 4: After the different fluids with proportional flow rates are adjusted, they flow into the mixing tube through the valve body and the central square tube in sequence and are blended inside the mixing tube; Step 5: Finally, the blended lubricating oil is passed into a mixing tank for storage in preparation for subsequent packaging.

[0016] One or more technical solutions provided in this application have at least the following technical effects or advantages: By optimizing and improving the structure of the central square tube in the prior art, a flexible layer with a certain elasticity is used to cooperate with the fluid to expand it, thereby squeezing the sub-channels at the upper and lower positions, and the flow rate of the fluid in the sub-channels becomes larger, so that the central square tube can timely adjust the flow rate of other fluids in the upper and lower sub-channels through the flow rate of the fluid at the center position, thereby improving the sensitivity of the system to the fluid and the central square tube of the flexible layer has a good vibration reduction effect, which effectively solves the technical problems in the prior art that the central square tube has a single size and shape, cannot adapt to changes in different fluid properties in time, has poor vibration reduction, has a low sensitivity of the system to changes in fluid and is not conducive to production and manufacturing, and achieves the technical effect that the central square tube has a variety of shapes and sizes, can adapt to changes in different fluid properties in time, has improved vibration reduction, has improved sensitivity of the system to changes in fluid and is conducive to production and manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure is an overall plan view of a lubricating oil blending device of the present invention.

[0018] Figure 2 The present invention is a three-dimensional cross-sectional view of a buffer mechanism of a lubricating oil blending device.

[0019] Figure 3 The present invention is a front view of a flexible layer in a buffer mechanism of a lubricating oil blending device in an expanded state.

[0020] Figure 4 This is a state diagram of a buffer mechanism and a flexible pipe of a lubricating oil blending device of the present invention in an initial state.

[0021] Figure 5 This is a state diagram of a buffer mechanism and a flexible tube of a lubricating oil blending device of the present invention in an expanded state.

[0022] Figure 6 The present invention is a partial three-dimensional structural back view of a buffer mechanism of a lubricating oil blending device.

[0023] In the figure: 100, branch pipe; 110, flexible pipe; 200, mixing pipe; 300, buffer mechanism; 310, valve body; 311, electromagnet; 320, central square pipe; 330, guide plate; 340, transmission shaft; 350, return plate; 360, baffle plate; 370, flexible layer; 371, inner layer; 372, outer layer; 380, expansion zone; 381, gear; 382, ​​rack; 383, response blade; 400, material tank; 500, mixing tank. DETAILED DESCRIPTION

[0024] To facilitate the understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0025] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0027] See also Figure 2 , which is a full cross-sectional view of the three-dimensional structure of a buffer mechanism 300 of a lubricating oil blending device of the present invention; the lubricating oil blending device of the present invention optimizes and improves the structure of the central square tube 320 in the prior art, and adopts a flexible layer 370 with a certain elasticity to cooperate with the fluid and expand it under the action of the fluid, thereby squeezing the branch channels at the upper and lower positions, and the flow rate of the fluid in the branch channels becomes larger, so that the central square tube 320 can timely adjust the flow rate of other fluids in the upper and lower branch channels through the flow rate of the fluid at the center position, thereby improving the sensitivity of the system to the fluid and the central square tube 320 of the flexible layer 370 has a good vibration reduction effect, so that the central square tube 320 has various shapes and sizes, can adapt to the changes in the properties of different fluids in time, improves the vibration reduction, improves the sensitivity of the system to the change of fluid, and is conducive to production and manufacturing. Technical effect.

[0028] Embodiment 1: Figure 1 and Figure 2As shown, the present application is a lubricating oil blending device, comprising a branch pipe 100 for conveying different lubricating oil fluids, a mixing pipe 200 for conveying and mixing various base oils and additive fluids, a buffer mechanism 300 for regulating the flow of different fluids, and a material tank 400 and a mixing tank 500 for containing fluids with different characteristics; The buffer mechanism 300 includes a valve body 310, a central square tube 320, a guide plate 330, a transmission shaft 340, a return plate 350 and a baffle 360; The valve body 310 is fixed between the branch pipe 100 and the mixing pipe 200 and is used to drive the fluid to be transported; The central square tube 320 is fixed in the middle of the valve body 310 and is used to separate different fluids and transport lubricating oil fluid; A plurality of flexible layers 370 are arranged at intervals in the middle of the central square tube 320. When the flow velocity or flow rate of the internal fluid is too large, the flexible layer 370 expands and squeezes the upper and lower flow channels, thereby controlling the input flow rate of the fluid in each flow channel and improving the sensitivity. The flexible layer 370 has a certain elasticity. When the central square tube 320 vibrates due to liquid input or external reasons, the flexible layer 370 can have a better vibration reduction effect on the whole system and reduce the influence of vibration on the blending of the lubricating oil.

[0029] The return plate 350 and the baffle plate 360 ​​are fixed in sequence from left to right in the tube cavity of the central square tube 320 through the rotating shaft, and are used to control the flow rate of the fluid in the central square tube 320; The guide plate 330 is fixed between the valve body 310 and the central square tube 320 through the transmission shaft 340 and is in the same vertical line as the return plate 350 , and is used to cooperate with the return plate 350 and the baffle plate 360 ​​to jointly control the flow of each fluid.

[0030] After the fluid is input, when the fluid input flow rate in the central square tube 320 is too fast or the input amount is too much, the flexible layer 370 expands due to its elastic properties and under the action of the fluid. The expansion can slow down the flow rate of the fluid in the main channel in the central square tube 320, and at the same time squeeze the upper and lower channels, so that the liquid flow rate in the upper and lower sub-channels is accelerated, thereby controlling the dynamic and mixing state of the fluid entering the sub-channel and improving the mixing effect of the lubricating oil.

[0031] The method for using the lubricating oil blending device (lubricating oil blending method) of the embodiment of the present application is: Step 1: connect the output ends of the branch pipe 100 and the mixing pipe 200 with the mixing and blending material tank 400 and the mixing tank 500, and connect the input and output ends of the buffer mechanism 300 with the corresponding branch pipe 100 and the material tank 400; Step 2: Adjust the flow channels and connection positions of different fluids according to production and blending requirements, and introduce different fluids into the valve body 310 and the central square tube 320 according to the blending requirements; Step 3: After different fluids are introduced into the valve body 310 and the central square tube 320, when the velocity or flow rate of the fluid inside the central square tube 320 is too large, the flexible layer 370 expands and squeezes the different fluids in the upper and lower flow channels, so that the velocity and flow rate of the different fluids in the upper and lower flow channels change accordingly with the flow rate of the fluid inside the central square tube 320, thereby controlling the input flow rate of the fluid in each flow channel and improving the sensitivity. At the same time, the guide plate 330 deflects in different sizes according to the flow rate of the fluid flow, thereby driving the return plate 350 and the baffle plate 360 ​​to rotate, so that the return plate 350 and the baffle plate 360 ​​adjust the actual conduction inside the central square tube 320, and they are linked to each other to achieve overall flow regulation; Step 4: After the different fluids with flow rates adjusted in proportion flow into the mixing tube 200 through the valve body 310 and the central square tube 320 in sequence, they are blended inside the mixing tube 200; Step 5: Finally, the blended lubricating oil is passed into the mixing tank 500 for storage in preparation for subsequent packaging.

[0032] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages: The present invention effectively solves the technical problems in the prior art that the central square tube 320 has a single size and shape, cannot adapt to changes in the properties of different fluids in time, has poor vibration damping, has a low sensitivity of the system to changes in fluid quality, and is not conducive to production and manufacturing. The present invention achieves the technical effect that the central square tube 320 has a variety of shapes and sizes, can adapt to changes in the properties of different fluids in time, has improved vibration damping, has improved sensitivity of the system to changes in fluid quality, and is conducive to production and manufacturing.

[0033] Embodiment 2: In order to further improve the scope of application of the present invention and enhance the flexibility of the device, the present application proposes the following technical solutions for the above technical problems, specifically: like Figure 2-Figure 4 As shown, the flexible layer 370 is an airbag structure, having two layers, an inner layer 371 and an outer layer 372; The inner layer 371 is fixed to the outer wall of the central square tube 320 and communicates with it; The outer layer 372 is fixed to the outer side wall of the central square tube 320 and is located outside the inner layer 371; A gap is left between the inner layer 371 and the outer layer 372 , and the interior is connected to an air pump via a pipeline, so that the elasticity and ductility of the flexible layer 370 in an expanded state can be adjusted by controlling the internal inflation amount.

[0034] Preferably, in order to better control the fluid flow rate and flow rate, the fully expanded volume of the flexible layer 370 under the action of fluid flow is 2 to 4 times that of the initial state; the elasticity of the flexible layer 370 between the inner layer 371 and the outer layer 372 when fully filled with gas is 0.5 to 0.8 times that of the initial state.

[0035] The air pump is used to control the elasticity of the flexible layer 370 of the lubricating oil blending device of the present application, which is a prior art and will not be described in detail here.

[0036] By outputting and adjusting the air content between the outer layer 372 and the inner layer 371 through the air pump, the elasticity of the flexible layer 370 during expansion is dynamically balanced, thereby improving the stability of the conveying and blending process, achieving precise control of the flow rate and pressure of different fluids and enabling efficient mixing, ensuring that the components in the lubricating oil are evenly mixed, and avoiding the problem of excessive or low content in some parts, thereby improving and enhancing the blending quality of the lubricating oil, reducing the blending time, and improving production efficiency.

[0037] The flexible layer 370 with dynamically controlled elasticity can avoid the device being restricted by the material, so that the system can be adjusted according to the blending requirements of lubricating oils with different characteristics, thereby improving the application scope of the present invention and enhancing the flexibility and adaptability of the system.

[0038] Embodiment 3: In order to improve the response speed of the system to the fluid sensitivity and improve the blending efficiency of the device, the present application proposes the following technical solutions for the above technical problems, specifically: like Figure 4 and Figure 5 As shown, expansion areas 380 are formed between the flexible layer 370 and the valve body 310, and a response mechanism is fixed inside each expansion area 380; The response mechanism includes a gear 381, a rack 382 and a response blade 383; The gear 381 is provided in plurality and is evenly fixed on the inner wall of the valve body 310 through a rotating shaft; the gear 381 located on the far right and close to the mixing pipe 200 is fixed on the transmission shaft 340; The rack 382 is an annular structure, meshing with each gear 381 through meshing transmission, and is used to drive the guide plate 330 to rotate synchronously, thereby further controlling the flow rate according to the flow rate and sensitivity, and realizing the system's regulation of different fluid qualities; There are multiple response blades 383, all fixed under the corresponding rotating shaft, which are used to shorten the response feedback time of the guide plate 330 to the fluid flow rate and cooperate with the gear 381 and the rack 382 to drive the guide plate 330 to rotate, so as to improve the sensitivity; by setting the response blade 383 coaxially rotating with the guide plate 330 inside the expansion zone 380, the rotation angle of the response blade 383 can be timely fed back to the return plate 350, so that the main channel inside the central square tube 320 can make corresponding changes according to the flow velocity and flow rate of the sub-channels on the upper and lower sides of the central square tube 320, so as to improve the sensitivity of the system to the system's transportation and blending process, and improve the controllability of the blending and transportation process.

[0039] When the fluid flow or pressure changes, the response blade 383 can quickly sense and adjust the flow area of ​​the channel by changing its rotation angle and speed, thereby maintaining stable flow conditions and enhancing the system's sensitivity to lubricant changes. It can achieve rapid and fine adjustment of the flow and pressure of the lubricant fluid, making the system respond more quickly and sensitively to changes in flow and pressure.

[0040] Embodiment 4: In order to make the blending system more adaptable to different flow rates and flow conditions and have higher adjustment accuracy, so as to improve the sensitivity and controllability of the device, the present application proposes the following technical solutions for the above technical problems, specifically: like Figure 5 and Figure 6 As shown, a flexible tube 110 cooperating with the response blade 383 is slidably connected in the expansion area 380 through magnetic attraction, and is used to push the response blade 383 to rotate at an angle in the expansion state, thereby further controlling the angular rotation of the guide plate 330.

[0041] Preferably, the flexible tube 110 is made of rubber, and the diameter of the open end in the expanded state is 3 to 4 times that in the initial state; preferably, the diameter of the tail end of the flexible tube 110 in the expanded state is 1.2 to 1.5 times that in the initial state. When the diameter of the tail end in the expanded state is much smaller than the diameter of the open end, the expansion state of the open end and the effect of pushing the response blade 383 to rotate are more obvious, ensuring the stability during expansion, thereby ensuring the stability of the angle rotation of the response blade 383.

[0042] A square ring magnet is fixed to the open end of the flexible tube 110 to fix the flexible tube 110 in the internal position of the expansion area 380. Since the expansion degree of the small elastic channel is directly affected by the fluid flow and pressure, when the flow changes slightly, the small elastic channel can respond quickly, and adjust the flow distribution in the pipeline by pushing the response blade 383 and the rotation angle of the guide plate 330, so that the system is more sensitive to flow changes, can adapt and adjust faster, and help to more accurately control the blending ratio, so that the blending system has stronger adaptability to different flow rates and flow conditions.

[0043] Preferably, in order to further improve the response effect and sensitivity of the flexible tube 110 and the response blade 383, the outer wall of the valve body 310 is slidably connected with an electromagnet 311 matched with a square annular magnet, which is used to control the relative position of the flexible tube 110 and the response blade 383 through magnetic attraction, thereby further controlling the sensitivity of the system to the flow rate of the fluid. The relative position of the flexible tube 110 and the response blade 383 in the expansion area 380 of the flexible layer 370 is controlled by magnetic attraction, thereby controlling the expansion amount of the flexible layer 370 of the main channel, and at the same time, the rotation angle of the response blade 383 can be controlled by the expansion amount of the flexible tube 110, thereby further controlling the flow rate of the fluid, and facilitating the control of the sensitivity during the conveying and blending process.

[0044] The flow rates of the main channel of the central square tube 320 and the upper and lower side sub-channels influence and interact with each other, jointly maintaining the sensitivity and stability of the entire system, which is beneficial to the blending of the lubricating oil, and responds to the linkage adjustment mechanism of the blades 383 and the guide plates 330. It can make fine adjustments according to slight changes in the flow rate, has higher adjustment accuracy, can better meet the application scenarios with higher requirements for flow control, and expand the scope of application.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A lubricating oil blending device, comprising a branch pipe (100) for conveying different lubricating oil fluids, a mixing pipe (200) for conveying and mixing various base oils and additive fluids, a buffer mechanism (300) for regulating the flow of different fluids, a material tank (400) and a mixing tank (500) for containing fluids with different characteristics, characterized in that: The buffer mechanism (300) comprises a valve body (310), a central square tube (320), a guide plate (330), a transmission shaft (340), a return plate (350) and a baffle plate (360); The valve body (310) is fixed between the branch pipe (100) and the mixing pipe (200) and is used to drive the fluid to be transported; The central square tube (320) is fixed to the middle of the valve body (310) and is used to separate different fluids and transport lubricating oil fluid; A plurality of flexible layers (370) are arranged at intervals in the middle of the central square tube (320). When the flow velocity or flow rate of the fluid inside the central square tube (320) is too large, the flexible layer (370) expands and squeezes the upper and lower flow channels, thereby controlling the input flow rate of the fluid in each flow channel and improving the sensitivity. The return plate (350) and the baffle plate (360) are fixed in sequence from left to right in the tube cavity of the central square tube (320) through a rotating shaft, and are used to control the flow rate of the fluid in the central square tube (320); The guide plate (330) is fixed between the valve body (310) and the central square tube (320) via a transmission shaft (340) and is located on the same vertical line as the return plate (350), and is used to cooperate with the return plate (350) and the baffle plate (360) to jointly control the flow of each fluid.

2. A lubricating oil blending device as claimed in claim 1, characterized in that: The flexible layer (370) is an airbag structure having two layers, namely an inner layer (371) and an outer layer (372); The inner layer (371) is fixed to the outer side wall of the central square tube (320) and communicates therewith; The outer layer (372) is fixed to the outer side wall of the central square tube (320) and is located outside the inner layer (371); A gap is left between the inner layer (371) and the outer layer (372), the interior of which is connected to an air pump via a pipeline, and the elasticity and ductility of the flexible layer (370) in an expanded state are adjusted by controlling the internal inflation volume.

3. A lubricating oil blending device as claimed in claim 2, characterized in that: The volume of the flexible layer (370) fully expanded under the action of fluid flow is 2 to 4 times that of the initial state; the elasticity of the flexible layer (370) between the inner layer (371) and the outer layer (372) when fully filled with gas is 0.5 to 0.8 times that of the initial state.

4. A lubricating oil blending device as claimed in claim 3, characterized in that: An expansion zone (380) with upper and lower positions opposite to each other is formed between the flexible layer (370) and the valve body (310), and a response mechanism is fixed inside each expansion zone (380); The response mechanism comprises a gear (381), a rack (382) and a response blade (383); A plurality of gears (381) are provided, and are evenly fixed on the inner wall of the valve body (310) through rotating shafts; the gear (381) located on the rightmost side and close to the mixing pipe (200) is fixed on the transmission shaft (340); The rack (382) is an annular structure, meshing with each gear (381) by meshing transmission, and is used to drive the guide plate (330) to rotate synchronously, thereby further controlling the flow rate according to the flow velocity and sensitivity, and realizing the system's regulation of different fluid qualities; A plurality of response blades (383) are provided, all fixed below the corresponding rotating shaft, and are used to shorten the response feedback time of the guide plate (330) to the fluid velocity and cooperate with the gear (381) and the rack (382) to drive the guide plate (330) to rotate, thereby improving sensitivity.

5. A lubricating oil blending device as claimed in claim 4, characterized in that: A flexible tube (110) matching the response blade (383) is slidably connected in the expansion zone (380) through magnetic attraction, and is used to push the response blade (383) to rotate at an angle in the expansion state, thereby further controlling the angle rotation of the guide plate (330).

6. A lubricating oil blending device as claimed in claim 5, characterized in that: The flexible tube (110) is made of rubber, and the diameter of its open end in the expanded state is 3 to 4 times that in the initial state.

7. A lubricating oil blending device as claimed in claim 6, characterized in that: The diameter of the tail end of the flexible tube (110) in the expanded state is 1.2 to 1.5 times that in the initial state.

8. A lubricating oil blending device as claimed in claim 7, characterized in that: A square ring magnet is fixed to the open end of the flexible tube (110) to fix the flexible tube (110) in a position inside the expansion zone (380).

9. A lubricating oil blending device as claimed in claim 8, characterized in that: The outer wall of the valve body (310) is slidably connected to an electromagnet (311) that cooperates with the square annular magnet, and is used to control the relative position of the flexible tube (110) and the response blade (383) through magnetic attraction, thereby further controlling the sensitivity of the system to the flow rate of the fluid.

10. A lubricating oil blending method, characterized in that: The method for blending lubricating oil using any one of the lubricating oil blending devices described in claims 1 to 9 above comprises the following specific steps: Step 1: connecting the output ends of the branch pipe (100) and the mixing pipe (200) to the material tank (400) and the mixing tank (500) for mixing and blending, and connecting the input and output ends of the buffer mechanism (300) to the corresponding branch pipe (100) and the material tank (400); Step 2: adjusting the flow channels and connection positions of different fluids according to production blending requirements, and introducing different fluids into the valve body (310) and the central square tube (320) according to the blending requirements; Step 3: After different fluids are introduced into the valve body (310) and the central square tube (320), when the velocity or flow rate of the fluid inside the central square tube (320) is too large, the flexible layer (370) expands and squeezes the different fluids in the upper and lower flow channels, so that the velocity and flow rate of the different fluids in the upper and lower flow channels change accordingly with the flow rate of the fluid inside the central square tube (320), thereby controlling the input flow rate of the fluid in each flow channel and improving the sensitivity. At the same time, the guide plate (330) deflects to different degrees according to the flow rate of the fluid flow, thereby driving the return plate (350) and the baffle plate (360) to rotate, so that the return plate (350) and the baffle plate (360) adjust the actual conductance inside the central square tube (320), and they are linked to each other to achieve overall flow regulation; Step 4: After the different fluids have been adjusted in proportion, they flow into the mixing tube (200) through the valve body (310) and the central square tube (320) in sequence, and are blended inside the mixing tube (200); Step 5: Finally, the blended lubricating oil is passed into a mixing tank (500) for storage in preparation for subsequent packaging.

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