CN110043534A - The visual experimental apparatus and method of bubbly flow and bubble removing in hydraulic system - Google Patents
The visual experimental apparatus and method of bubbly flow and bubble removing in hydraulic system Download PDFInfo
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- CN110043534A CN110043534A CN201910352965.XA CN201910352965A CN110043534A CN 110043534 A CN110043534 A CN 110043534A CN 201910352965 A CN201910352965 A CN 201910352965A CN 110043534 A CN110043534 A CN 110043534A
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- transparent
- slide rail
- square tube
- fuel tank
- speed camera
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/047—Preventing foaming, churning or cavitation
Abstract
The visual experimental apparatus and method of bubbly flow and bubble removing in hydraulic system move freely the upper installation high-speed camera and laser light sheet of bracket, and high-speed camera and laser light sheet can be adjusted arbitrarily, be moved freely.Transparent fuel tank is fixed on tank support, and outlet is connect with transparent oil suction square tube.Hydraulic oil flows back to fuel tank by hydraulic hose, hydraulic hose breaks close to the one of fuel tank to be connect with transparent oil return opening by pumping with after reversal valve.The method for visualizing of bubbly flow and bubble removing in hydraulic system, bubbly flow method for visualizing are the bubble images for recording high-speed camera shooting, read the pressure measuring value of each position；Bubble removing method for visualizing is that two pieces of strainers are installed in fuel tank, and the angle for adjusting strainer and horizontal plane is 90 °；The bubble image for recording high-speed camera shooting, reads the pressure measuring value of each position；The angle for adjusting strainer and horizontal plane is 45 °, is repeated the above steps, and shoots image by high-speed camera and saves.
Description
Technical field
The present apparatus is related to hydraulic technique, and in particular to bubbly flow visualization and bubble removing technology in hydraulic system.
Background technique
An important factor for oil liquid cleaning is reliable guarantee system, stable and safe operation in hydraulic system, and bubble is shadow
Ring the important indicator of oil cleanliness.System is having a variety of causes that can make to be mixed into a certain amount of sky in hydraulic oil in actual work
Gas causes system response characteristic to be deteriorated, and causes hydraulic shock, vibration and noise, and cavitation occur, aggravates Hydraulic Elements
Damaged surfaces etc..As high-speed camera is in the extensive use of these research fields, flow visual becomes research these problems
Important way cannot achieve visual but since in traditional experimental provision, fuel tank, fluid pressure line, Hydraulic Elements are all opaque
Change；Experimental provision structure is fixed, and observable region is relatively simple；Interchangeability is not high between a variety of depassing units, thus has
Significant limitation.
Summary of the invention
The object of the present invention is to provide the visual experimental apparatus and side of bubbly flow and bubble removing in a kind of hydraulic system
Method.
The visual experimental apparatus of bubbly flow and bubble removing in hydraulic system of the invention is transparent by oil return pipe holder 5
Fuel tank 9, transparent oil suction square tube 10, the first hydraulic hose 11, the second hydraulic hose 26 move freely bracket 111, pump 7, third liquid
Press hose 13, pressure gauge 15, threephase asynchronous 22, overflow valve 8, reversal valve 18, load 11, laser light sheet 16, high speed
Video camera 17, transparent oil return square tube 19, system transparent square tube 24, hydraulic hose 25, pressure sensor 27a, 27b, 27c, 27d group
At.It is characterized by: transparent fuel tank 9 is a square opening transparent vessel with the end, fuel tank branch is placed on after hydraulic oil is added
On frame 20, transparent fuel tank 9 accesses hydraulic system by transparent oil suction square tube 10, and hydraulic oil is flowed back to by transparent oil return square tube 19
Bright fuel tank 9,9 lower part of transparent fuel tank open up a rectangular oil outlet, and transparent oil suction square tube 10 passes through rectangular oil outlet and transparent fuel tank 9
Connection；4 pressure sensors 27 are arranged in transparent oil suction square tube 10, transparent oil suction square tube 10 is protruded into 27 one end of pressure sensor,
The other end reads pressure value by conducting wire, and pressure sensor 27 and the junction of transparent oil suction square tube 10 are fully sealed；Transparent suction
Oily square tube 10 is connect with pump 7, and pump 7 is connect by shaft coupling 22 with threephase asynchronous 6；Pump 7 is hydraulic soft by the hydraulic 4th
Pipe 25 is connect with integrated package 23, and the pressure of the measurement of pressure gauge 15 outlet is installed on the 4th hydraulic hose 25；Reversal valve 18, overflow valve
8 and system transparent square tube 24 be separately fixed on integrated package 23 by bolt；Load 11 is hydraulic soft by first with integrated package 23
Pipe 12 and the connection of the second hydraulic hose 26；Transparent oil return square tube 19 is connected by third hydraulic hose 13 and system transparent square tube 24
It connects, transparent oil return square tube 19 is bolted to be fixed on and move freely on bracket 1h；High-speed camera 17 is fixed on high speed and takes the photograph
In camera cradle 3, laser light sheet 16 is connect with laser light sheet bracket 2c, and laser light sheet bracket 2c and slide rail 1e connect
It connects；Strainer 20a, 20b and horizontal plane inclination are fixed on inside transparent fuel tank 9, and angle can be adjusted freely.
The bubbly flow of the visual experimental apparatus of bubbly flow and bubble removing and degasification in hydraulic system more than
The step of method for visualizing of bubble, bubbly flow method for visualizing are as follows:
(1) high-speed camera 17 is opened, is adjusted to the position to be observed；
(2) laser light sheet 16 is opened, is adjusted to the top for being intended to observation position；
(3) power supply for connecting motor 6, allows hydraulic system to start to work；
(4) the bubble image for recording the shooting of high-speed camera 17, reads the pressure measuring value of each position, is obtained by high-speed camera
To picture can analyze bubble formation, laws of motion.
The step of bubble removing method for visualizing are as follows:
(1) two pieces of strainers 20a, 20b are installed in fuel tank, the angle for adjusting strainer 20a, 20b and horizontal plane is 90 °；
(2) high-speed camera 17 is opened, is adjusted to the position to be observed；
(3) laser light sheet 16 is opened, is adjusted to the top for being intended to observation position；
(4) power supply for connecting motor 6, allows hydraulic system to work normally；
(5) the bubble image for recording high-speed camera shooting, reads the pressure measuring value of each position；
(6) angle in the aperture and strainer and horizontal plane that change the step the strainer in (1) is 45 °, repeat above-mentioned step (2) ~
Step (5) shoots image by high-speed camera 17 and saves.
The invention has the benefit that 1. experimental datas are accurate.The image that high-speed camera 17 is shot than general camera is more
Clear, bubbly flow process is more accurate；Due to the cross sectional shape of fuel tank oil suction pipe 10, transparent oil return pipe 19 be it is rectangular, will not
It is closer to the collection result of bubble image practical since light refraction causes to deform.2. experimental provision is flexible, observation scope
Extensively.The position of laser light source 16 can arbitrarily be adjusted, and conveniently illuminate any visual region.High-speed camera 17 can slide
It is free to slide to all directions on guide rail 1, the bubbly flow of any position can be observed.4. interchangeability is high, using model
It encloses wide.The position of oil return nozzle 19 can arbitrarily be adjusted, and facilitate the job requirement realized under different condition.Overflow valve 8, reversal valve
9, load 11 can arbitrarily replace with other hydraulic actuating mechanisms, can detect to other elements.Strainer 20a, 20b
Flexible arrangement is set, can be arranged with any angle；Replacement is convenient, could alternatively be the strainer in any aperture, also could alternatively be it
His depassing unit.
Detailed description of the invention
Fig. 1 is the structure chart of apparatus of the present invention, and Fig. 2 is the systematic schematic diagram of apparatus of the present invention, and Fig. 3 is sliding of the invention
Guide rail bracket, Fig. 4 are for transparent 10 structural schematic diagram of oil suction square tube of the invention, and Fig. 5 is transparent 19 knot of oil return square tube of the invention
Structure schematic diagram, Fig. 6 are 24 structural schematic diagrams of system transparent square tube of the invention, and Fig. 7 is in transparent oil suction square tube 10 of the invention
The pressure sensor 27a, 27b, 27c, 27d, Fig. 8 of arrangement are the connections of transparent oil return square tube 19 Yu hydraulic hose 13 of the invention
Sealing means, Fig. 9 are the connection sealing means of transparent fuel tank 9 and transparent oil suction square tube 10 of the invention.
Appended drawing reference and corresponding title in figure are as follows: slide rail frame 111, slide rail 1a, 1b, 1c, 1d, 1e, 1f,
1g, 1h, 1I, 1j, sliding block 2a, 2b, 2c, 2d, 2e, 2f, 2g, 2h, 2I, 2j, oil return pipe flange 5, threephase asynchronous 6, pump
7, overflow valve 8, transparent fuel tank 9, transparent oil suction square tube 10, load 11, the first hydraulic hose 12, third hydraulic hose 13 is hydraulic
Table 15, laser light sheet 16, high-speed camera 17, reversal valve 18, transparent oil return square tube 19, strainer 20a, 20b, shaft coupling 22,
Integrated package 23, system transparent square tube 24, the 4th hydraulic hose 25, the second hydraulic hose 26, pressure sensor 27a, 27b, 27c,
27d, O-ring seals 28, square hole 29, acrylic flange 30, acrylic flange 31, O-ring seals 32, square nut 33a, 33b,
33c、33d。
Specific embodiment
As shown in Fig. 1 ~ Fig. 9, the visual experimental apparatus of bubbly flow and bubble removing in hydraulic system of the invention, by returning
Oil tube bracket 5, transparent fuel tank 9, transparent oil suction square tube 10, the first hydraulic hose 11, the second hydraulic hose 26 move freely bracket
111,7, third hydraulic hose 13, pressure gauge 15, threephase asynchronous 22, overflow valve 8, reversal valve 18, load 11, laser are pumped
Sheet laser 16, high-speed camera 17, transparent oil return square tube 19, system transparent square tube 24, hydraulic hose 25, pressure sensor 27a,
27b, 27c, 27d composition.Transparent fuel tank 9 is a square opening transparent vessel with the end, is placed on fuel tank after hydraulic oil is added
On bracket 20, transparent fuel tank 9 accesses hydraulic system by transparent oil suction square tube 10, and hydraulic oil is flowed back to by transparent oil return square tube 19
Transparent fuel tank 9,9 lower part of transparent fuel tank open up a rectangular oil outlet, and transparent oil suction square tube 10 passes through rectangular oil outlet and clean oil
Case 9 is connected to；4 pressure sensors 27a, 27b, 27c, 27d of arrangement in transparent oil suction square tube 10, pressure sensor 27a, 27b,
27c, 27d protrude into one end transparent oil suction square tube 10, and the other end reads pressure value by conducting wire, pressure sensor 27a, 27b, 27c,
27d and the junction of transparent oil suction square tube 10 are fully sealed；Transparent oil suction square tube 10 7 connect with pump, pump 7 by shaft coupling 22 and
Threephase asynchronous 6 connects；Pump 7 is connect by hydraulic hose 25 with integrated package 23, and pressure gauge 15 is installed on hydraulic hose and is surveyed
Measure the pressure of mouth；Reversal valve 18, overflow valve 8 and system transparent square tube 24 are separately fixed on integrated package 23 by bolt；It is negative
11 are carried to connect with integrated package 23 by hose 12 and hose 26；Transparent oil return square tube 19 passes through hydraulic hose 13 and system transparent side
Pipe 24 connects, and transparent oil return square tube 19 is bolted to be fixed on and move freely on bracket 1h；High-speed camera 17 is fixed on
On high-speed camera stand 3, laser light sheet 16 is connect with laser light sheet bracket 2c, and laser light sheet bracket 2c is led with sliding
Rail 1e connection；Strainer 20a, 20b and horizontal plane inclination are fixed on inside transparent fuel tank 9, and angle can be adjusted freely.
As shown in Fig. 1 ~ Fig. 9, slide rail 1a and slide rail 1b parallel arrangement, slide rail 1c slide rail 1a is in water
Plane is vertical, is connected by sliding block 2a with sliding block 2c, and slide rail 1c is along the direction of slide rail 1a and slide rail 1b freedom
Sliding；Slide rail 1d is connected perpendicular to slide rail 1c by sliding block 2b, can be moved freely along the direction slide rail 1c；
Slide rail 1g, 1f are vertical with slide rail 1a, 1b, are connected by sliding block 2a, 2c, slide rail 1g, 1f can be along slide rails
The direction of 1a, 1b are free to slide；Slide rail 1e is vertical with slide rail 1g, 1f, is connected by sliding block 2e with sliding block 2d, sliding
Guide rail 1g, 1f can be free to slide along the vertical direction；Slide rail 1j is parallel with slide rail 1c, slide rail 1i and slide rail
1j is vertical, is connected by sliding block 2g, and slide rail 1i can be free to slide along slide rail 1j；Slide rail 1h and slide rail 1i
Vertically, it is connected by sliding block 2h, slide rail 1h can be free to slide along slide rail 1i.
As shown in Fig. 1, Fig. 4, Fig. 5, Fig. 6, transparent oil suction square tube 10, transparent oil return square tube 19, system transparent square tube 24
Cross section is square, and both ends are all the structure of a square flange, and 4 holes are arranged at four angles of square flange.
As shown in Fig. 1, Fig. 7, Fig. 9,4 pressure sensors are uniformly distributed along oil liquid flow direction in transparent oil suction square tube 10
27a, 27b, 27c, 27d, relative position are equal.Pressure sensor is located on transparent 10 lower section tube wall of oil suction square tube.
As shown in Fig. 1, Fig. 8, pass through metal flange 5 and 4 metal spiral shell between transparent oil return square tube 19 and oil returning tube 13
It tethers and connects, and sealed using o shape sealing ring 28.
As shown in Fig. 1, Fig. 9, transparent fuel tank 9 export between square hole 29 and transparent oil suction square tube 10 through acrylic flange and
Metal bolts connection, and sealed using o shape sealing ring 32.4 square nuts, square nut are fixed on fuel tank oil outlet wall surface
It is fixed by the acrylic flange 30,31 for being provided with intermediate rectangular runner and nut bore, it is sealed by four bolt presses.
As shown in Fig. 1 ~ Fig. 9, filled using the visualized experiment of bubbly flow and bubble removing in above-described hydraulic system
The step of method for visualizing of the bubbly flow and bubble removing set, bubbly flow method for visualizing are as follows:
(1) high-speed camera 17 is opened, is adjusted to the position to be observed；
(2) laser light sheet 16 is opened, is adjusted to the top for being intended to observation position；
(3) power supply for connecting motor 6, allows hydraulic system to start to work；
(4) the bubble image for recording the shooting of high-speed camera 17, reads the pressure measuring value of each position, is obtained by high-speed camera
To picture can analyze bubble formation, laws of motion.
The step of bubble removing method for visualizing are as follows:
(1) two pieces of strainers 20a, 20b are installed in fuel tank, the angle for adjusting strainer 20a, 20b and horizontal plane is 90 °；
(2) high-speed camera 17 is opened, is adjusted to the position to be observed；
(3) laser light sheet 16 is opened, is adjusted to the top for being intended to observation position；
(4) power supply for connecting motor 6, allows hydraulic system to work normally；
(5) the bubble image for recording high-speed camera shooting, reads the pressure measuring value of each position；
(6) angle in the aperture and strainer and horizontal plane that change the step the strainer in (1) is 45 °, repeat above-mentioned step (2) ~
Step (5) shoots image by high-speed camera 17 and saves.
In order to make embodiments of the present invention purpose, technical solution and feature definitely, with reference to the accompanying drawing to this hair
Bright implementation process is described in detail.
Embodiment 1: fuel sucking pipe implication steeps flow visual experiment:
As shown in Figure 1, the position of left and right and up and down adjustment laser light sheet 16 is extremely by freely regulated slide rail frame 111
Right above transparent oil suction square tube 10, while the position for adjusting high-speed camera 17 and laser light sheet 16 be in same straight line, can be with
Clearly shoot transparent oil suction square tube 10.When reversal valve 18 is in middle position, under the action of hydraulic pump 7, hydraulic oil passes through oil suction
Transparent fuel tank 9 is flowed into after square tube to reversal valve 18, system transparent pipeline 24 and transparent oil return pipe 19.During this period, high-speed camera
16 cooperating of machine 17 and laser light sheet, is observed and records to the flow behavior of the bubble of oil suction nozzle position, saves
The image of high-speed camera shooting.
Embodiment 2: fuel sucking pipe implication steeps flow visual experiment:
As shown in Figure 1, the position of left and right and up and down adjustment laser light sheet 16 is extremely by freely regulated slide rail frame 111
9 front of transparent fuel tank, while the position for adjusting high-speed camera 17 and transparent fuel tank 9, in sustained height, front and back is adjusted to can
Clearly to shoot inside transparent fuel tank 9.Reversal valve 18 is moved into left position, adjusts the setting value that load 11 is larger than overflow valve 8,
At this point, hydraulic oil returns transparent fuel tank 9 after flowing through overflow valve 8, system transparent pipeline 24, transparent oil return pipe 19, high-speed camera is saved
The image of machine shooting.
Embodiment 3: the visualized experiment of strainer bubble removing:
As shown in Figure 1, the angle for adjusting strainer is 45 °, and subsequent step is according to implementation after adding strainer 20a, 20b in fuel tank
The step of example 1, operates.
Claims (7)
1. the visual experimental apparatus of bubbly flow and bubble removing in hydraulic system, including transparent fuel tank (9), transparent oil suction square tube
(10), bracket (111), pump (7), threephase asynchronous (22), overflow valve (8), reversal valve (18), load are moved freely
(11), laser light sheet (16), high-speed camera (17), transparent oil return square tube (19), it is characterised in that: transparent fuel tank (9) is
One square opening transparent vessel with the end is placed on tank support (20) after hydraulic oil is added, and transparent fuel tank (9) passes through saturating
Bright oil suction square tube (10) accesses hydraulic system, and hydraulic oil flows back to transparent fuel tank (9), transparent fuel tank by transparent oil return square tube (19)
(9) lower part opens up a rectangular oil outlet, and transparent oil suction square tube (10) is connected to by rectangular oil outlet with transparent fuel tank (9)；It is transparent
4 pressure sensors (27) are arranged in oil suction square tube (10), transparent suction is protruded into the one end pressure sensor (27a, 27b, 27c, 27d)
Oily square tube (10), the other end read pressure value, pressure sensor (27a, 27b, 27c, 27d) and transparent oil suction square tube by conducting wire
(10) junction is fully sealed；Transparent oil suction square tube (10) connect with pump (7), and pump (7) is different with three by shaft coupling (22)
Walk motor (6) connection；Pump (7) is connect by hydraulic hose (25) with integrated package (23), and pressure gauge is installed on hydraulic hose
(15) pressure of measurement outlet；Reversal valve (18), overflow valve (8) and system transparent square tube (24) are separately fixed at collection by bolt
On blocking (23)；Load (11) is connect with integrated package (23) by the first hydraulic hose (12) and the second hydraulic hose (26)；Thoroughly
Bright oil return square tube (19) is connect by third hydraulic hose (13) with system transparent square tube (24), and transparent oil return square tube (19) passes through
It is bolted to be fixed on and moves freely bracket 1(h) on；High-speed camera (17) is fixed on high-speed camera stand (3), laser
Sheet laser (16) is connect with laser light sheet bracket (2c), and laser light sheet bracket (2c) is connect with slide rail (1e)；Strainer
The inclination of (20a, 20b) and horizontal plane is fixed on transparent fuel tank (9) inside, and angle can be adjusted freely.
2. the visual experimental apparatus of bubbly flow and bubble removing, feature exist in hydraulic system according to claim 1
In: slide rail (1a) and slide rail (1b) parallel arrangement, slide rail (1c) slide rail (1a) lead in horizontal plane
Cross sliding block (2a) and sliding block (2c) connection, direction free skating of the slide rail (1c) along slide rail (1a) and slide rail (1b)
It is dynamic；Slide rail (1d) is connected perpendicular to slide rail (1c) by sliding block (2b), can be along the direction slide rail (1c) freedom
It is mobile；Slide rail (1g, 1f) and slide rail (1a, 1b) vertically, are connected, slide rail (1g, 1f) by sliding block (2a, 2c)
It can be free to slide along the direction of slide rail (1a, 1b)；Slide rail (1e) and slide rail (1g, 1f) vertically, pass through sliding block
The connection of (2e) and sliding block (2d), slide rail (1g, 1f) can be free to slide along the vertical direction；Slide rail (1j) and slide rail
(1c) in parallel, slide rail (1i) is vertical with slide rail (1j), is connected by sliding block (2g), slide rail (1i) can be along sliding
Guide rail (1j) is free to slide；Slide rail (1h) is vertical with slide rail (1i), is connected by sliding block (2h), slide rail (1h)
It can be free to slide along slide rail (1i).
3. the visual experimental apparatus of bubbly flow and bubble removing, feature exist in hydraulic system according to claim 1
In: transparent oil suction square tube (10), transparent oil return square tube (19), the cross section of system transparent square tube () is square, and both ends
It is all the structure of a square flange, 4 holes are arranged at four angles of square flange.
4. the visual experimental apparatus of bubbly flow and bubble removing, feature in hydraulic system according to claim 1
It is, is uniformly distributed 4 pressure sensors (27), pressure sensor along oil liquid flow direction on transparent oil suction square tube (10)
The relative position of (27a, 27b, 27c, 27d) is equal；Pressure sensor is located at below transparent oil suction square tube (10) on tube wall.
5. the visual experimental apparatus of bubbly flow and bubble removing, feature in hydraulic system according to claim 1
It is, is connect between transparent oil return square tube (19) and oil returning tube (13) by metal flange (5) and 4 metal bolts, and adopt
It is sealed with o shape sealing ring (28).
6. the visual experimental apparatus of bubbly flow and bubble removing, feature in hydraulic system according to claim 1
It is, transparent fuel tank (9), which exports, to be connected between square hole (29) and transparent oil suction square tube (10) by acrylic flange and metal bolts
It connects, and is sealed using o shape sealing ring (32)；Fix 4 square nuts on fuel tank oil outlet wall surface, square nut by being provided in
Between rectangular runner and the acrylic flange (30,31) of nut bore it is fixed, pass through four bolt presses sealings.
7. bubbly flow and bubble removing method for visualizing in hydraulic system, which is characterized in that the step of bubbly flow method for visualizing
Suddenly are as follows:
(1) high-speed camera is opened, is adjusted to the position to be observed；
(2) laser light sheet is opened, is adjusted to the top for being intended to observation position；
(3) power supply for connecting motor, allows hydraulic system to work normally；
(4) the bubble image for recording high-speed camera shooting, reads the pressure measuring value of each position；
In hydraulic system the step of bubble removing method for visualizing are as follows:
(1) two pieces of strainers are installed in fuel tank, the angle for adjusting strainer and horizontal plane is 90 °；
(2) high-speed camera is opened, is adjusted to the position to be observed；
(3) laser light sheet is opened, is adjusted to the top for being intended to observation position；
(4) power supply for connecting motor, allows hydraulic system to work normally；
(5) the bubble image for recording high-speed camera shooting, reads the pressure measuring value of each position；
(6) angle of strainer and horizontal plane is 45 ° in set-up procedure (1), repeats above-mentioned step (2) ~ step (5), passes through height
Fast video camera shoots image and saves.
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| CN201910352965.XA CN110043534B (en) | 2019-04-29 | 2019-04-29 | Visual experiment device and method for bubble flowing and bubble removal in hydraulic system |
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| CN111175197A (en) * | 2020-01-08 | 2020-05-19 | 武汉理工大学 | Observation device and method for mineral surface bubble nucleation and bubble growth process |
| CN112141290A (en) * | 2020-09-25 | 2020-12-29 | 哈尔滨工程大学 | Method for testing flow field or bubble field of ship model cross section |
| CN113075210A (en) * | 2021-03-31 | 2021-07-06 | 华北电力大学 | Visual measuring device of bubble motion in oil under vibration and electric field coupling effect |
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