CN208542162U - The autoclave of cavitation erosion test under a kind of environment for confining pressure - Google Patents
The autoclave of cavitation erosion test under a kind of environment for confining pressure Download PDFInfo
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- CN208542162U CN208542162U CN201820543822.8U CN201820543822U CN208542162U CN 208542162 U CN208542162 U CN 208542162U CN 201820543822 U CN201820543822 U CN 201820543822U CN 208542162 U CN208542162 U CN 208542162U
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Abstract
The utility model provides a kind of autoclave of cavitation erosion test under the environment for confining pressure, belongs to industry cleaning link technical field.The autoclave includes ontology, contain component, Power Component, detection components and electromagnetic relief valve, wherein ontology includes upper cover, autoclave, containing component includes spray nozzle device, visor, pressure duct, sunpender, clamping device and target disc pedestal, Power Component includes servo motor, flexible axle and lead screw, detection components include pressure sensor A, pressure sensor B, hydrophone, flowmeter, component is contained to install from upper cover center to autoclave, servo motor is located at one upper side of upper cover, it contains and is connected between component and Power Component by lead screw, it is connected between lead screw and servo motor using the flexible axle through autoclave and upper cover, electromagnetic relief valve is located at one side-lower of autoclave.The utility model can realize jet pressure oscillation, cavitation erosion, the synchronous detection of flow field characteristic and the resistance to Cavitation evaluation of material, easy to operate, work efficiency is high.
Description
Technical field
The utility model relates to industry cleaning link technical fields, particularly relate to a kind of for cavitation erosion test under confining pressure environment
Autoclave.
Background technique
Cavitation jet is impacted using the high-amplitude high-frequency pressure that bubble collapse generates, and erosion effect can be significantly improved under confining pressure
Fruit, thus there is broad prospect of application in fields such as deep sea mineral resources exploitation, oil drilling, underwater cleanings.
It is excellent that cavitation jet characteristic determines that it only can just give full play to especially under high confining pressure operating condition in the condition of flooding
Gesture, however carried out under the conditions of non-submersion mostly for the research of cavitation jet and detection at present, experimental condition and result with
Engineering physical presence larger difference.A small number of utility models can be used for studying jet erosion characteristic under confining pressure, be not possible to realize confining pressure
Accurate control, while single erosion test can only be carried out, jet pressure oscillating characteristic, cavitation can not be obtained simultaneously and penetrated
The correlation of stream flow field structure, erosion behavior and cavitation is not illustrated still.Existing utility model sets sensor simultaneously
In in confining pressure environment, waterproof problem, integrity problem and data transmission problems are highlighted, while there is also range adjusting is not smart
Really, the problems such as repeatable poor and nozzle exchange is cumbersome.
The resistance to Cavitation of material is as one of material important performance, its service life of strong influence and application bar simultaneously
Part.The U.S. has the relevant resistance to cavitation test standard of material, uses cavitation jet or ultrasonic cavitation device to the resistance to cavitation corrosion of material
Performance is evaluated, but equally exists the problems such as can not obtaining dynamics of jets characteristic and cavitation noise characteristic in real time.
Dynamics of jets characteristic under existing utility model high confining pressure relatively difficult to achieve, cavitation noise characteristic, Field Characteristics
Therefore the synchronous evaluation of real-time detection and erosion behavior, the assessment that can not be also applied to the resistance to Cavitation of material develop a kind of behaviour
Make cavitation jet erosion test and device for detecting performance easy, detection method multiplicity and be suitable under high confining pressure environment, for
It is applied under the research of cavitation jet erosion behavior, confining pressure and the popularization of fluidics is of great significance.
This seminar has obtained 1 relevant country's authorization utility model patent (ZL201420253178.2), i.e., a kind of
The intracavitary oscillator signal detection device of high-pressure water jet self-excited nozzle (hereinafter referred to as " former patent "), former patent vibrate chamber in spray nozzle device
Sensor is simultaneously installed in external week and oscillation chamber impingement area lower end setting signal acquisition hole, and by obtaining to data collection and analysis
Nozzle cavity fluid pressure pulse characteristic, and then realize the detection of self-vibration nozzle performance.Former patented nozzle device is typically in sky
Gas or normal pressure floodage cannot achieve self-vibration jet characteristics under high confining pressure and detect, and only arrange a kind of pressure in nozzle wall
Force snesor can not acquire the cavitation noise of jet stream, while former patent does not have target and erosion sample holding device, can not carry out
Jet erosion test.The utility model carries out a series of improvement to former patent: (1) spray nozzle device being placed in autoclave, simulated
Realize the submerged jets working environment under confining pressure；(2) increase hydrophone in autoclave side wall, realize jet flow cavitation noise letter
Number acquisition and cavitation characteristic acquisition；(3) in the real-time accurate adjustable erosion sample of spray nozzle device arranged beneath range
Clamping device can carry out jet erosion under high confining pressure and test, and evaluate jet stream cavitation corrosion effect, or grind to the expansion of material resistance to Cavitation
Study carefully.
Utility model content
The technical problem to be solved by the present invention is to provide a kind of high pressures of cavitation erosion test under environment for confining pressure
The accurate control of confining pressure may be implemented in kettle, the device, and pressure fluctuation characteristics and the cavitation for real-time and accurately detecting cavitation jet are special
Property；Jet erosion under different operating conditions can be carried out simultaneously to test, evaluate jet erosion performance；Also it can be tried for different erosion materials
Sample evaluates its resistance to Cavitation, and in conjunction with high speed photography, which can also realize that cavitation jet high confining pressure floods
Flow field characteristic detection under operating condition.
The autoclave specifically includes ontology, contains component, Power Component, detection components and electromagnetic relief valve, wherein ontology
Including upper cover and autoclave, be attached between upper cover and autoclave by bolt, contain component include spray nozzle device, visor,
Pressure duct, sunpender, clamping device and target disc pedestal, Power Component include servo motor, flexible axle and lead screw, and detection components include
Pressure sensor A, pressure sensor B, hydrophone and flowmeter contain component and install from upper cover center to autoclave, watch
It takes motor and is located at one upper side of upper cover, contain and connected between component and Power Component by lead screw, between lead screw and servo motor
It is connected using through autoclave with the flexible axle of upper cover, electromagnetic relief valve is located at one side-lower of autoclave, electromagnetic relief valve one
End connection flowmeter, the other end connect autoclave.
Wherein, the through-hole passed through for containing component is provided on upper lid, through hole is arranged supporting table, is stamped fast-assembling in supporting table
Blind plate is fixed between fast-assembling blind plate and supporting table by Quick hoop, and fast-assembling blind plate is connected with the top of sunpender.
Splendid attire component bottom is target disc pedestal, and target disc pedestal can drive clamping device to lean under power device effect
Close or remote from the movement of spray nozzle device, to realize that range is adjusted；Lead screw passes through target disc pedestal, supports clamping device on lead screw, presss from both sides
Placement erosion sample on device is held, is spray nozzle device right above clamping device, spray nozzle device is to carry out erosion to erosion sample
Operation, visor are arranged around clamping device, and downrod lower end connects target disc pedestal.
Spray nozzle device top is connected with pressure duct, and pressure sensor B, pressure sensor B mono- are provided on pressure duct
The detection of incoming higher pressure water pressure may be implemented in aspect, is on the other hand based on line pressure signal detection method, may be implemented to penetrate
The detection of flowing pressure pulse characteristic.
Flexible axle is constituted using flexible material, and flexible axle one end connects servo motor, and flexible axle other end connection wire rod passes through flexible axle
The power of servo motor is sent to lead screw, by screw rod by the vertical motion for being changed into target disc pedestal of flexible axle, in turn
Realize that the movement close to or far from nozzle assembly occurs for clamping device.On the one hand the high-precision of range may be implemented in the Power Component
On-line tuning, substantially increase range adjusting repeatability, on the other hand using flexible soft shaft may be implemented Power Component and
The monoblock type extraction for containing component, so that the replacement of erosion sample and spray nozzle device is more convenient.
Hydrophone and pressure sensor A are arranged on the lateral wall of autoclave, hydrophone and pressure sensor A and nozzle
Device water outlet is parallel to each other, and can reduce the decaying of pressure oscillation caused by jet stream and cavitation noise signal to the maximum extent,
Noise when detection accuracy is improved, the detection of confining pressure, cavitation noise, Fluid pressure oscillating characteristic is realized.
Visor is two sides, opposite to be mounted on position parallel with spray nozzle device on the side wall for containing component in autoclave
On the one hand place, visor can observe sample erosion effect in the detection process, on the other hand can use high-speed camera equipment pair
Jet flow field characteristic is studied under confining pressure.
Splendid attire component, which has, leaves the first state that outer body replaces erosion sample and spray nozzle device, Yi Jishen
Enter erosion sample to be carried out in autoclave the second state of erosion.
Flowmeter and electromagnetic relief valve utilize the buffer function of lower half fluid, realize the control and system of autoclave confining pressure
The monitoring of flow.
The above-mentioned technical proposal of the utility model has the beneficial effect that:
The utility model is easy to operate, safe and reliable, and jet flow cavitation noise characteristic, pressure fluctuation under high confining pressure may be implemented
The synchronous detection of characteristic, erosion property, jet flow field, jet stream detection working efficiency greatly improve；By hydrophone and pressure sensing
Device is arranged in autoclave side wall or periphery, solves the problems, such as cable seal, improves sensor life-time and safety, based on pipe
Road fluid signal transmission principle picks up oscillator signal, avoids the influence of high confining pressure environment, is that cavitation jet detects under high confining pressure
Work provides a strong guarantee；Flexible axle and precision lead screw are driven using servo motor, to realize the online of range under high confining pressure
It is accurate to adjust, test labor intensity is significantly reduced, test repeatability is improved；Servo motor torque is transmitted using flexible axle,
Its good flexible characteristic ensure that the flexible extraction of target disc；Spray nozzle device and erosion sample target disc are each attached to fast-assembling blind plate
On, its monoblock type can be extracted out, realize being switched fast for experimental rig；Clamping device can realize erosion sample quickly more
It changes, it is easy to accomplish the evaluation of the resistance to Cavitation of different materials.The utility model provides for cavitation jet Characteristics Detection under high confining pressure
New means become the powerful guarantee of cavitation jet research.
Detailed description of the invention
Fig. 1 is the autoclave structural schematic diagram of cavitation erosion test under a kind of environment for confining pressure of the utility model；
Fig. 2 is under confining pressure environment provided by the utility model, when using self-vibration spray nozzle device, under jet stream different conditions
Pressure signal spectrogram, wherein (a) is resonance state spectrogram, (b) is non-resonant behavior spectrogram；
Fig. 3 is the noise signal function under confining pressure environment provided by the utility model, under self-resonating cavitating jet different conditions
Rate spectrogram, wherein (a) is that strong cavitation noise power spectrum occurs, and (b) is weaker cavitation noise power spectrum；
Fig. 4 is the material erosion table under confining pressure environment provided by the utility model, under self-resonating cavitating jet different conditions
Face pattern, wherein (a) is the erosion sample pattern under stronger cavitation, is (b) the erosion sample shape under weaker cavitation
Looks.
Wherein: 1- fast-assembling blind plate, 2- Quick hoop, 3- servo motor, 4- upper cover, 5- bolt, 6- autoclave, 7- pressure
Sensors A, 8- spray nozzle device, 9- visor, 10- pressure duct, 11- pressure sensor B, 12- sunpender, 13- hydrophone, 14- folder
Hold device, 15- target disc pedestal, 16- lead screw, 17- flexible axle, 18- flowmeter, 19- electromagnetic relief valve.
Specific embodiment
In order to make the technical problems, technical solutions and advantages to be solved by the utility model clearer, below in conjunction with attached drawing
And specific embodiment is described in detail.
The utility model provides a kind of autoclave of cavitation erosion test under the environment for confining pressure.
As shown in Figure 1, the autoclave specifically includes ontology, contains component, Power Component, detection components and electromagnetic relief valve
19, wherein ontology includes upper cover 4 and autoclave 6, contain component include spray nozzle device 8, visor 9, pressure duct 10, sunpender 12,
Clamping device 14 and target disc pedestal 15, Power Component include servo motor 3, flexible axle 17 and lead screw 16, and detection components include pressure
Sensors A 7, pressure sensor B11, hydrophone 13 and flowmeter 18 contain component and install from 4 center of upper cover to autoclave 6
Portion, servo motor 3 are located at 4 one upper side of upper cover, contain and are connected between component and Power Component by lead screw 16, lead screw 16 with
It is connected between servo motor 3 using the flexible axle 17 through 6 inside of autoclave and upper cover 4, electromagnetic relief valve 19 is located at autoclave 6 one
Side-lower, 19 one end of electromagnetic relief valve connect flowmeter 18, and the other end connects autoclave 6.Wherein, it is provided in upper cover 4 for containing
The through-hole that component passes through, through hole are arranged supporting table, are stamped fast-assembling blind plate 1 in supporting table, lead between fast-assembling blind plate 1 and supporting table
It is fixed to cross Quick hoop 2, fast-assembling blind plate 1 is connected with the top of sunpender 12.Splendid attire component bottom is target disc pedestal 15, lead screw 16
Support clamping device 14 on target disc pedestal 15, lead screw 16, place erosion sample on clamping device 14, clamping device 14 just on
Side is spray nozzle device 8, and visor 9 is arranged around clamping device 14, and 12 lower end of sunpender connects target disc pedestal 15.
8 top of spray nozzle device is connected with pressure duct 10, and pressure sensor B11 is provided on pressure duct 10.Flexible axle 17
It is constituted using flexible material, 17 one end of flexible axle connects servo motor 3, and 17 other end of flexible axle connects lead screw 16, will by flexible axle 17
The power of servo motor 3 is sent to lead screw 16, by lead screw 16 by the vertical fortune for being changed into target disc pedestal 15 of flexible axle 17
It is dynamic, and then realize that the movement close to or far from spray nozzle device 8 occurs for clamping device 14.
Hydrophone 13 and pressure sensor A7 are arranged on the lateral wall of autoclave 6, hydrophone 13 and pressure sensor A7
It is parallel to each other with 8 water outlet of spray nozzle device.
Visor 9 is two sides, opposite to be mounted on position parallel with spray nozzle device 8 on the side wall for containing component in autoclave 6
Set place.
Splendid attire component, which has, leaves the first state that outer body replaces erosion sample and spray nozzle device 8, and
Go deep into autoclave 6 carrying out erosion sample the second state of erosion.
The application method of the autoclave, specifically: spray nozzle device and erosion sample are mounted on according to test request first
On pressure duct end and clamping device, component will be contained and be placed in autoclave, sealed autoclave using Quick hoop.High pressure
Water enters spray nozzle device by pressure duct, is recorded and is shown by pressure sensor B and adjusted after incoming-flow pressure, incoming-flow pressure are stablized
The control that electromagnetic relief valve realizes confining pressure is saved, and by confining pressure value in pressure sensor A record display test mesohigh kettle, is passed through
Flowmeter is shown and the working media flow in recording device.Fluid oscillating is acquired by pressure sensor A, pressure sensor B
Information acquires cavitation noise information by hydrophone, can also observe self-vibration jet flow field feature by visor in the course of work.
After the completion of detection, opens Quick hoop and take out fast-assembling blind plate together together with spray nozzle device and erosion sample, analysis erosion examination
It tests effect and evaluates.
Self-vibration spray nozzle device is used in specific test, generates the more strong self-resonating cavitating jet of cavitation.Such as Fig. 2
(a) occur strong self-oscillation when pressure signal spectrogram shown in, by spectrogram it can be seen that in spectrogram there are two amplitude very
High crest frequency, about 6.6kHz, 13.2kHz, wherein 13.2kHz is consistent with self-vibration jet natural frequency.And it does not send out
When raw strong self-oscillation, as shown in Fig. 2 (b), pressure signal is relatively steady, vibrates without high amplitude pressure.
The cavitation noise signal that synchronous acquisition obtains, analysis obtain cavitation noise signal power spectrogram as shown in Fig. 3, send out
With violent cavitation effect when the strong self-vibration of raw high frequency, acoustical power spectrogram crest frequency substantially with pressure signal spectrogram one
It causes (see Fig. 3 a), the cavitation noise power spectrum of strong self-oscillation does not occur equally does not have obvious peak value ingredient (see Fig. 3 b).
In addition, the device can also be evaluated by erosion test jet flow cavitation function and effect are set.As shown in figure 4,
For the erosion specimen surface pattern obtained under different cavitation conditions using fine aluminium sample, as seen from the figure, cavitation it is relatively strong (see
Fig. 4 a) with weaker (see Fig. 4 b) operating condition under erosion area and depth there were significant differences, electronic balance, surface profile also can be used
Instrument and electron microscope carry out quantitative assessment to erosion result.
The above is preferred embodiments of the present invention, it is noted that for the ordinary skill of the art
For personnel, under the premise of not departing from principle described in the utility model, several improvements and modifications can also be made, these improvement
It also should be regarded as the protection scope of the utility model with retouching.
Claims (8)
1. the autoclave of cavitation erosion test under a kind of environment for confining pressure, it is characterised in that: including ontology, contain component, dynamic
Power component, detection components and electromagnetic relief valve (19), wherein ontology includes upper cover (4) and autoclave (6), and containing component includes
Spray nozzle device (8), visor (9), pressure duct (10), sunpender (12), clamping device (14) and target disc pedestal (15), Power Component
Including servo motor (3), flexible axle (17) and lead screw (16), detection components include pressure sensor A (7), pressure sensor B
(11), hydrophone (13) and flowmeter (18) contain component and install, servo motor internal to autoclave (6) from upper cover (4) center
(3) it is located at (4) one upper side of upper cover, contains and connected between component and Power Component by lead screw (16), lead screw (16) and servo
It is connected between motor (3) using through autoclave (6) internal flexible axle (17) with upper cover (4), electromagnetic relief valve (19) is located at height
(6) one side-lower of kettle is pressed, electromagnetic relief valve (19) one end connects flowmeter (18), and the other end connects autoclave (6).
2. according to claim 1 under a kind of environment for confining pressure cavitation erosion test autoclave, it is characterised in that: it is described
The through-hole passed through for containing component is provided in upper cover (4), through hole is arranged supporting table, is stamped fast-assembling blind plate (1) in supporting table, fastly
It fills and is fixed between blind plate (1) and supporting table by Quick hoop (2), fast-assembling blind plate (1) is connected with the top of sunpender (12).
3. according to claim 1 under a kind of environment for confining pressure cavitation erosion test autoclave, it is characterised in that: it is described
Containing component bottom is target disc pedestal (15), and lead screw (16) passes through target disc pedestal (15), and lead screw supports clamping device on (16)
(14), erosion sample is placed on clamping device (14), is right above clamping device (14) spray nozzle device (8), and visor (9) setting exists
Around clamping device (14), sunpender (12) lower end connects target disc pedestal (15).
4. according to claim 1 under a kind of environment for confining pressure cavitation erosion test autoclave, it is characterised in that: it is described
Spray nozzle device (8) top is connected with pressure duct (10), and pressure sensor B (11) are provided on pressure duct (10).
5. according to claim 1 under a kind of environment for confining pressure cavitation erosion test autoclave, it is characterised in that: it is described
Flexible axle (17) is constituted using flexible material, and flexible axle (17) one end connects servo motor (3), and flexible axle (17) other end connects lead screw
(16), the power of servo motor (3) is sent to by lead screw (16) by flexible axle (17), passes through lead screw (16) turning flexible axle (17)
Turn becomes the vertical motion of target disc pedestal (15), and then realizes that clamping device (14) occur close to or far from spray nozzle device (8)
Movement.
6. according to claim 1 under a kind of environment for confining pressure cavitation erosion test autoclave, it is characterised in that: it is described
Hydrophone (13) and pressure sensor A (7) are arranged on the lateral wall of autoclave (6), hydrophone (13) and pressure sensor A
(7) it is parallel to each other with spray nozzle device (8) water outlet.
7. according to claim 1 under a kind of environment for confining pressure cavitation erosion test autoclave, it is characterised in that: it is described
Visor (9) is two sides, opposite to be mounted on position parallel with spray nozzle device (8) on the side wall for containing component in autoclave (6)
Place.
8. according to claim 1 under a kind of environment for confining pressure cavitation erosion test autoclave, it is characterised in that: it is described
Splendid attire component, which has, leaves the first state that outer body replaces erosion sample and spray nozzle device (8), and deeply height
Press the second state for carrying out erosion in kettle (6) to erosion sample.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820543822.8U CN208542162U (en) | 2018-04-17 | 2018-04-17 | The autoclave of cavitation erosion test under a kind of environment for confining pressure |
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| CN201820543822.8U CN208542162U (en) | 2018-04-17 | 2018-04-17 | The autoclave of cavitation erosion test under a kind of environment for confining pressure |
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| CN208542162U true CN208542162U (en) | 2019-02-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108355583A (en) * | 2018-04-17 | 2018-08-03 | 北京科技大学 | A kind of autoclave for cavitation erosion test under confining pressure environment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108355583A (en) * | 2018-04-17 | 2018-08-03 | 北京科技大学 | A kind of autoclave for cavitation erosion test under confining pressure environment |
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