A device for synchronously measuring jet state and droplet wall distribution morphology

Abstract

The invention belongs to the technical field of oil and gas measurement, and relates to a synchronous measurement device for a jet state and a droplet wall distribution morphology. The main structure comprises a mounting frame, a bracket, an adjustment frame, a microscope, a charge-coupled element, a glass plate, a nozzle plate mounting plate, a nozzle, an oil and gas chamber, a displacement stage combination and a camera, and the following beneficial effects are achieved: 1. The nozzle sprays oil droplets in the oil and gas chamber, and the oil and gas will not drift to the outside, which is green and environmentally friendly, protects personal safety, and prevents inhalation; 2. According to specific working conditions, by replacing nozzles with different inner diameters, the influence of oil and gas formed by different aspect ratios is compared, the nozzle is flexible to replace and does not rust in water, and the inner surface is locally oleophobic; 3. The displacement stage combination can flexibly adjust the horizontal distance between the camera lens and the jet to observe the jet state at different heights; 4. The camera observes the jet state, and the microscope and the charge-coupled element measure the droplet distribution state, and the quality of the oil and gas is comprehensively evaluated from two aspects, and the effect is rapid.

Description

Technical field:

[0001] The present invention belongs to the technical field of oil and gas measurement, and relates to a device for synchronously measuring the jet state and the wall distribution morphology of droplets. By simulating the process of an oil-gas mixture spraying oil droplets into a bearing chamber through a nozzle, the influence of the density of the guide body and the oil supply amount on the jet state and distribution state of the lubricating oil droplets is studied. Background technology:

[0002] With the continuous development of industrial technology, the requirements for bearing lubrication in various industries are getting higher and higher. Oil-gas lubrication technology has the applicability that traditional oil lubrication does not have in dealing with harsh working conditions such as high temperature, heavy load, high speed, extremely low speed, and cooling water and pollutants invading the lubrication points. Oil lubrication has high viscosity and high load-bearing capacity, and has been widely used in the lubrication of various equipment. However, with the gradual enhancement of human environmental awareness and the improvement of environmental legislation, the environmental pollution and non-renewable energy problems caused by oil lubrication have made people turn more attention to environmentally friendly oil-gas lubrication methods. Oil-gas lubrication has the great advantages of low lubricant consumption, low environmental pollution, and conducive to increasing the speed of bearings. It is suitable for machining centers, electric spindles, metallurgical equipment and other fields, and has a history of application for decades. Oil-gas lubrication technology, as a representative technology of advanced lubrication methods, has unparalleled advantages over traditional oil lubrication methods in energy saving and emission reduction, environmental protection, and improving bearing performance, and has a very large development space.

[0003] Oil-gas lubrication technology is also known as "gas-liquid two-phase fluid cooling lubrication technology". Its principle is to use the flow of compressed air in the pipeline to transport the lubricating oil along the inner wall of the pipeline and continuously transport it to the lubrication point in the form of micro droplets. Compared with traditional oil lubrication, oil-gas lubrication has obvious advantages: the sprayed oil droplets have a very high exit velocity, so that the lubricating oil can completely break through the air barrier formed during the bearing rotation process, ensuring the amount of lubricating oil and air entering the bearing, thereby achieving the purpose of spray lubrication and cooling; no pollution to the environment, oil and gas are separated, and only air is discharged into the atmosphere; the lubricating oil consumption is small. As an advanced lubrication technology, oil-gas lubrication will be more widely used in the future.

[0004] When people study the effects of oil supply parameters such as oil supply quantity, air supply pressure, oil supply frequency, pipeline layout, and pipeline joints on annular flow, they evaluate the lubrication effect by temperature rise, torque, and vibration, and conclude that under certain working conditions, there is an optimal oil supply quantity, air supply pressure, oil supply frequency, and other parameters. At the same time, the nozzle is also an important influencing part of oil-gas lubrication. After studying the parameters such as nozzle diameter, aspect ratio, and contraction angle, it is found that the nozzle angle and number of oil-gas lubrication have an effect on the lubrication of bearings. The above studies all study the effect of oil-gas mixing from the results of lubrication (temperature rise, torque, and vibration). There is a lack of a synchronous measurement device for measuring the jet state and droplet wall distribution to directly measure the oil-gas state including the nozzle jet state and droplet wall distribution. Summary of the invention:

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art, develop and design a device for synchronously measuring the jet state and the droplet wall distribution morphology, and use nozzles with different aspect ratios that can be flexibly replaced to achieve synchronous measurement of the jet state and the droplet wall distribution morphology at different heights.

[0006] In order to achieve the above-mentioned purpose, the main structure of the device for synchronously measuring the jet state and droplet wall distribution morphology involved in the present invention includes a mounting frame, a bracket, an adjustment frame, a microscope, a charge-coupled device, a glass plate, a nozzle disk mounting plate, a nozzle, an oil-gas chamber, a displacement stage combination and a camera; the mounting frame and the bracket are independently arranged, an adjustment frame is arranged at the bottom of the mounting frame, the adjustment frame is connected to the microscope, a charge-coupled device (CCD) is arranged at the bottom of the microscope, a glass plate is arranged on the upper part of the mounting frame, a nozzle disk mounting plate is arranged on the top of the mounting frame, a nozzle is arranged on the nozzle disk mounting plate, and an oil-gas chamber is arranged between the glass plate of the mounting frame and the nozzle disk mounting plate; a displacement stage combination is arranged on the top of the bracket, and a camera is arranged on the displacement stage combination.

[0007] The adjustment frame involved in the present invention is arranged on a mounting plate at the bottom of the mounting frame; a glass plate is arranged on a glass mounting plate at the upper part of the mounting frame; a nozzle plate with a cylindrical structure is arranged on the nozzle plate mounting plate, a plurality of bolt holes and working holes with circular structures are arranged at equal intervals around the center of the nozzle plate, the nozzle plate mounting plate is bolted to the nozzle plate through the bolt holes, the nozzle is placed in the working hole, and the guide body is placed in the nozzle through a fixer; the oil and gas chamber is formed by enclosing four acrylic plates; the displacement stage assembly is arranged on the displacement stage mounting plate at the top of the bracket; the displacement stage assembly is connected to the camera through a mounting angle iron; the lens of the camera is opposite to the oil and gas chamber.

[0008] The mounting frame and the bracket involved in the present invention are both composed of aluminum alloy profiles and angle irons, have a supporting function, are light in weight, and are flexible to install and disassemble; a microscope and a charge-coupled element are used to observe the distribution state of droplets; a glass plate is a glass plate with a diameter of 150 mm or a glass sheet with a side length of 150 mm; a working hole is suitable for placing nozzles of different models, and when working, only one working hole is used to place the nozzle, and the other working holes are in a closed state; the nozzle is a hollow structure with a length-to-diameter ratio of 4:1, a conical cross section, and an internal thread, and the inner surface of the nozzle is subjected to surface oleophobic treatment; a guide body is installed inside the nozzle and can guide the flow of oil droplets, and the guide body is directly installed inside the working hole to form a guide body nozzle; an acrylic plate includes a black matte plate and three light-transmitting acrylic plates, the black matte plate is away from a camera lens and serves as a shooting background of the camera, and the light-transmitting acrylic plate serves as an observation window; a displacement stage combination consists of a horizontal displacement stage and a vertical position, and is used to adjust the position of the camera; and the camera is a high-speed camera.

[0009] When the synchronous measuring device for the jet state and droplet wall distribution morphology according to the present invention is used:

[0010] Install the quick connector connected to the oil and gas system on the internal thread of the nozzle, and fix and seal the connection with sealing materials;

[0011] The positions of the microscope and the charge-coupled device are adjusted by adjusting the frame so that the microscope and the charge-coupled device can clearly observe the oil droplets on the glass plate;

[0012] The position of the camera is adjusted by means of a displacement stage combination so that the camera can capture the jet state of the oil droplets;

[0013] The oil and gas system is turned on, and the nozzle disperses the oil and gas two-phase flow provided by the oil and gas system into oil droplets, which are sprayed into the oil and gas chamber and then fall onto the glass plate;

[0014] Since oil-gas lubrication has a certain injection interval, the wall distribution of oil droplets can be fed back by the oil droplet size and distribution observed by microscope and charge-coupled device, and the jet state can be fed back by the injection area observed by camera to determine the quality of oil and gas;

[0015] The height of the camera is adjusted by the vertical translation stage to observe the jet state at different heights.

[0016] The synchronous measurement device for the jet state and droplet wall distribution morphology of the present invention simulates the uniform refinement effect of the entrainment body on the oil droplets in actual oil-gas lubrication by changing the density of the entrainment body and the oil supply amount, and analyzes the influence of the nozzle structure and oil supply parameters on the jet state and droplet wall distribution morphology in the bearing chamber under the oil-gas lubrication condition.

[0017] Compared with the prior art, the present invention simulates the jet morphology and distribution formed when the oil-gas mixture passes through the nozzle during oil-gas lubrication. When the oil-gas two-phase flow with different oil-gas parameters is sprayed into the oil-gas chamber through the nozzle, the camera observes the oil droplet jet state at different heights. When the jet is sprayed onto the glass plate, the microscope and the charge-coupled device observe the wall distribution of the oil droplet. By replacing the nozzles with different parameters, the jet state and the droplet wall distribution of various nozzles under different oil supply parameters are simulated and analyzed. The present invention has a simple structure, ingenious design, low manufacturing cost, friendly application environment, broad market prospects, and has achieved the following beneficial effects:

[0018] 1. The nozzle sprays oil droplets in the oil and gas chamber, and the oil and gas will not drift to the outside, which is green and environmentally friendly, protects personal safety and prevents inhalation;

[0019] 2. According to the specific working conditions, by replacing nozzles with different inner diameters, the influence of different aspect ratios on the oil and gas formed is compared. The nozzles can be replaced flexibly and will not rust in water. The inner surface is locally treated with oil repellent.

[0020] 3. The translation stage combination can flexibly adjust the horizontal distance between the camera lens and the jet to observe the jet state at different heights;

[0021] 4. The camera observes the jet state, the microscope and charge-coupled device measure the droplet distribution state, and the quality of oil and gas is comprehensively evaluated from two aspects, which takes effect quickly. Description of the drawings:

[0022] Figure 1 It is a schematic diagram of the main structural principle of the present invention.

[0023] Figure 2 The present invention is a schematic diagram of the connection between the glass mounting plate and the glass plate.

[0024] Figure 3 The figure is a schematic structural diagram of the nozzle disk involved in the present invention.

[0025] Figure 4 It is a schematic structural diagram of the nozzle involved in the present invention.

[0026] Figure 5 The figure is a schematic diagram of the connection relationship between the fixer and the flow guide body according to the present invention.

[0027] Figure 6 This is an image of the oil droplet wall distribution involved in Example 2 of the present invention.

[0028] Figure 7 This is the jet state image involved in Example 2 of the present invention.

[0029] Figure 8 This is the jet state image involved in Example 3 of the present invention. Specific implementation method:

[0030] The present invention will be further described below by way of embodiments in conjunction with the accompanying drawings.

[0031] Embodiment 1:

[0032] The main structure of the synchronous measurement device for the jet state and the droplet wall distribution morphology involved in this embodiment includes a mounting frame 1, a bracket 2, a mounting plate 3, an adjustment frame 4, a microscope 5, a charge coupled device 6, a glass mounting plate 7, a glass plate 8, a nozzle plate mounting plate 9, a nozzle plate 10, a bolt hole 11, a working hole 12, a nozzle 13, a flow guide 14, a fixture 15, an acrylic plate 16, a displacement stage mounting plate 18, a displacement stage assembly 19, a camera 20 and a mounting angle iron 21; the mounting frame 1 of the frame structure is independently arranged with the bracket 2, the bottom of the mounting frame 1 is provided with a mounting plate 3 with a convex structure, the mounting plate 3 is provided with an adjustment frame 4, the adjustment frame 4 is connected to the microscope 5, the bottom of the microscope 5 is provided with a charge coupled device (CCD) 6, the upper part of the mounting frame 1 is provided with a glass mounting plate 7, the glass mounting plate 7 is provided with a glass plate 8, and the top of the mounting frame 1 is provided with a rectangular plate-shaped A nozzle disc mounting plate 9 of a structure is provided, a nozzle disc 10 of a cylindrical structure is arranged on the nozzle disc mounting plate 9, a plurality of bolt holes 11 and working holes 12 of circular structures are arranged at equal intervals around the center of the nozzle disc 10, the nozzle disc mounting plate 9 is bolted to the nozzle disc 10 through the bolt holes 11, the working holes 12 are used to place the nozzles 13, the guide body 14 is placed in the nozzles 13 through the fixture 15, and the glass mounting plate 7 of the mounting frame 1 and the nozzle disc mounting plate 9 are surrounded by four acrylic plates 16 to form an oil and gas chamber 17 of an inner hollow rectangular structure; a displacement stage mounting plate 18 of a rectangular plate structure is provided on the top of the bracket 2, a displacement stage assembly 19 is provided on the displacement stage mounting plate 18, a camera 20 is provided on the displacement stage assembly 19, and the displacement stage assembly 19 is connected to the camera 20 through a U-shaped mounting angle iron 21; the lens of the camera 20 is opposite to the oil and gas chamber 17.

[0033] Embodiment 2:

[0034] The synchronous measurement device for the jet state and droplet wall distribution morphology involved in this embodiment analyzes the influence of the guide body 14 with different densities on the jet state and wall distribution under the oil-gas lubrication state: PAO10 base oil is delivered into the guide body nozzle with different densities at a gas supply pressure of 0.25 MPa and an oil supply interval of 500 s, and the jet state and wall distribution images are collected.

[0035] According to the jet state diagram, as the density of the guide body 14 increases, the jet area becomes smaller and the jet angle gradually decreases; according to the wall distribution diagram, it can be seen that the hole-type nozzle produces large oil droplets with uneven distribution of oil droplets, while the oil droplets produced by the guide body nozzle are relatively uniform, and as the density of the guide body 14 increases, the oil droplet size gradually decreases, and the size reduction amplitude decreases with the increase of the density of the guide body 14.

[0036] This proves that the guiding body 14 can refine the oil droplets and make the oil droplets evenly distributed.

[0037] Embodiment 3:

[0038] The jet state and droplet wall distribution morphology synchronous measurement device involved in this embodiment analyzes the influence of nozzle 13 with different oil supply amounts on the jet state under oil-gas lubrication state: PAO10 base oil is delivered into the hole nozzle at an air supply pressure of 0.25MPa and different oil supply intervals, and the jet state image is collected.

[0039] According to the jet state diagram, when the oil supply interval is 300s, the jet angle is large, and there are obviously larger oil particles in the jet, which corresponds to the large-sized oil droplets in the hole-type nozzle wall distribution image of Example 2; as the oil supply interval increases, the jet angle decreases, and the large-sized oil particles in the jet disappear.

Claims

1. A device for synchronously measuring the jet state and droplet wall distribution morphology, characterized in that: The main structure includes a mounting frame, a bracket, an adjustment frame, a microscope, a charge-coupled element, a glass plate, a nozzle disk mounting plate, a nozzle, an oil-gas chamber, a displacement stage assembly and a camera; the mounting frame and the bracket are independently arranged, an adjustment frame is arranged at the bottom of the mounting frame, the adjustment frame is connected to the microscope, a charge-coupled element is arranged at the bottom of the microscope, a glass plate is arranged at the upper part of the mounting frame, a nozzle disk mounting plate is arranged at the top of the mounting frame, a nozzle is arranged on the nozzle disk mounting plate, an oil-gas chamber is arranged between the glass plate of the mounting frame and the nozzle disk mounting plate; a displacement stage assembly is arranged at the top of the bracket, a camera is arranged on the displacement stage assembly, a nozzle disk with a cylindrical structure is arranged on the nozzle disk mounting plate, and the nozzle disk is evenly spaced around the center of the circle. Several circular bolt holes and working holes are separated, the nozzle plate mounting plate and the nozzle plate are bolted together through the bolt holes, the nozzle is placed in the working hole, the guide body is placed in the nozzle through a fixture, the working hole is suitable for placing nozzles of different models, when working, only one working hole is used to place the nozzle, and the other working holes are in a closed state, the oil and gas chamber is formed by enclosing four acrylic plates, one of which is a black matte acrylic plate, and the other three are translucent acrylic plates, the nozzle is a hollow structure with a length-to-diameter ratio of 4:1, a conical cross-section, and an internal thread, and the inner surface of the nozzle is treated with oil repellent surface; the guide body is installed inside the nozzle, and the guide body is directly installed inside the working hole to form a guide body nozzle.

2. The device for synchronously measuring the jet state and droplet wall distribution morphology according to claim 1, characterized in that: The mounting frame and the bracket are both composed of aluminum alloy profiles and angle irons, and the adjustment frame is arranged on the mounting plate at the bottom of the mounting frame.

3. The device for synchronously measuring the jet state and droplet wall distribution morphology according to claim 2, characterized in that: The glass plate is a glass disk with a diameter of 150 mm or a glass sheet with a side length of 150 mm, and is arranged on a glass mounting plate at the upper part of the mounting frame.

4. The device for synchronously measuring the jet state and droplet wall distribution morphology according to claim 3, characterized in that: The black matte board is away from the camera lens and serves as the camera's shooting background, and the translucent acrylic board serves as an observation window.

5. The device for synchronously measuring the jet state and droplet wall distribution morphology according to claim 4, characterized in that: The translation stage assembly is arranged on the translation stage mounting plate at the top of the bracket, and is composed of a horizontal translation stage and a vertical position, and is connected to the camera through a mounting angle iron to adjust the position of the camera.

6. The device for synchronously measuring the jet state and droplet wall distribution morphology according to claim 5, characterized in that: The camera is a high-speed camera, and the lens is opposite to the oil and gas chamber.

7. A device for synchronously measuring jet state and droplet wall distribution morphology according to claim 3 or 6, characterized in that: When using: Install the quick connector connected to the oil and gas system on the internal thread of the nozzle, and fix and seal the connection with sealing materials; The positions of the microscope and the charge-coupled device are adjusted by adjusting the frame so that the microscope and the charge-coupled device can clearly observe the oil droplets on the glass plate; The position of the camera is adjusted by means of a displacement stage combination so that the camera can capture the jet state of the oil droplets; The oil and gas system is turned on, and the nozzle disperses the oil and gas two-phase flow provided by the oil and gas system into oil droplets, which are sprayed into the oil and gas chamber and then fall onto the glass plate; Observe the oil droplet size and distribution through microscope and charge-coupled device, observe the oil injection area through camera, and judge the quality of oil and gas; The height of the camera is adjusted by the vertical translation stage to observe the jet state at different heights.

8. A device for synchronously measuring jet state and droplet wall distribution morphology according to any one of claims 1 to 6, characterized in that: By changing the density of the entrainment fluid and the oil supply amount, the uniform refinement effect of the entrainment fluid on the oil droplets in actual oil-gas lubrication is simulated, and the influence of the nozzle structure and oil supply parameters on the jet state in the bearing chamber and the droplet wall distribution morphology under oil-gas lubrication conditions is analyzed.

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