CN106979901A - One kind visualization cavity flow cavitation erosion simultaneous test device - Google Patents
One kind visualization cavity flow cavitation erosion simultaneous test device Download PDFInfo
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- CN106979901A CN106979901A CN201710261777.7A CN201710261777A CN106979901A CN 106979901 A CN106979901 A CN 106979901A CN 201710261777 A CN201710261777 A CN 201710261777A CN 106979901 A CN106979901 A CN 106979901A
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- back pressure
- core body
- cavitation erosion
- annular form
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
- G01N3/567—Investigating resistance to wear or abrasion by submitting the specimen to the action of a fluid or of a fluidised material, e.g. cavitation, jet abrasion
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- Life Sciences & Earth Sciences (AREA)
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- General Health & Medical Sciences (AREA)
- Immunology (AREA)
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- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention discloses one kind visualization cavity flow cavitation erosion simultaneous test device, aim at the synchronously visual experimental study of cavitation and cavitation erosion coupling, reduce cavitation and cavitation erosion and separately test brought error, improve cavitating flows and the convenience and accuracy of cavitation corrosion research in nozzle.The device mainly includes：Oil pipeline, gravity-pressing cover plate slides guide rail, and annular form flows core body, base, flowline, back pressure cavity choke valve, back pressure oil pocket and speed control muffler etc..The main points of its technical scheme are：Annular form that transparent material is made and the stream core body of almag material are embedded between gravity-pressing cover plate and base, the stream core body is the test specimen that can be arbitrarily replaced according to requirement of experiment.The present invention's is mainly used for while carrying out the visual research of cavitation and cavitation erosion.
Description
Technical field
It is one kind in scaling transparent nozzle specifically the present invention relates to diesel fuel injection system field
Portion's visualization cavity flow cavitation erosion simultaneous test device.
Technical background
Diesel engine can promote the atomizing effect of fuel oil in the cavitation that nozzle interior is produced, so as to improve the utilization of fuel oil
Rate and the discharge for reducing pollutant, but cavitation is also easily caused the cavitation wear of nozzle, has influence on the atomizing effect of fuel oil, even
Cavitation corrosion can promote nozzle micro-crack extension, cause the direct failure of nozzle.Therefore, the characteristic research of cavitating flows is always in nozzle
It is one of hot issue of domestic and international engine art.
But not yet there is device to disclosure satisfy that cavitation and cavitation erosion synchronously visual experimental study, current nozzle interior cavitation and
The research of cavitation phenomenon is still in the separated stage, and the visualizing monitor for carrying out nozzle interior cavitating flows first with transparent nozzle is ground
Study carefully, the detection for then carrying out cavitation phenomenon using particulate metal material nozzle under the same test conditions is studied, such to grind
Studying carefully mode can not be while obtains the characteristic of cavitation and cavitation erosion, and certain error can be brought to the result of the test of post-processing.
The content of the invention
The purpose of the present invention is to overcome shortcoming present in prior art there is provided a kind of synchronization of cavitation and cavitation erosion Coupling Research
Visual test device.
In order to solve above-mentioned technical problem, the present invention uses following technical proposals：
One kind visualization cavity flow cavitation erosion simultaneous test device, including entrance throttle, oil pipeline, clamping screw are sliding
Guide rail is moved, gravity-pressing cover plate, annular form flows core body, base, flowline, back pressure cavity choke valve, back pressure oil pocket, outlet
Choke valve and outlet oil pipe.
Described sliding guide rail one end is fixed on base, and the other end is fixed by clamping screw with gravity-pressing cover plate left end
Connection；The gravity-pressing cover plate upper end is integrated with Oil-pipeline welding, and lower end is fitted close with annular form upper end；It is described
It is installed on the right side of oil pipeline and entrance throttle is installed；The annular form lower end is fitted close with stream core body upper end；Institute
Stream core body lower end is stated to be fitted close with base upper end；Base bottom is provided with flowline, flowline and stream core body, annular form
Connect；The other end of flowline is connected with back pressure oil pocket, and back pressure cavity throttling is provided between flowline and back pressure oil pocket
Valve；
Outlet oil pipe is additionally provided with back pressure oil pocket, outlet oil pipe is provided with speed control muffler.
The gravity-pressing cover plate is cylindrical boss, and cylindrical groove, groove internal diameter are opened in the one end coordinated with annular form
It is equal with annular form internal diameter, and connected with oil pipeline.
The annular form is the transparent cylinder using acrylic plastics, and large diameter pipeline is driven in center；The ring
Shape form upper end recessing, groove internal diameter is equal with the external diameter of gravity-pressing cover plate lower end projection cylinder.
The stream core body is the interchangeable experimental sample being made up of hydronalium, according to the demand of experiment condition,
Can be to the shape of fluid core projection, roughness, tapered or flaring etc. is designed；Stream core body lower end is that external diameter is regarded with annular
The equal cylinder in footpath outside window, upper end is cylindric matrix, and external diameter is equal with annular form internal diameter, and matrix perisporium is straight with one
Portion, matrix perisporium along its circumferential end to end flat part and arc sections by constituting.
Crescent hole size shape inside the cylinder of the stream core body lower end is identical with stream core body runner, and with flowing core
Body runner connects.
The base is cylinder, and upper end recessing is allowed to fit completely with stream core body lower end；The chassis interior opens the moon
Thread form duct, size shape is identical with stream core body runner, and is connected with flowline.
Described sliding guide rail one end is fixed on chassis left side centre position by screw thread technique；The sliding guide rail can make weight
Power holddown plate is moved up and down, adjusting position.
The back pressure cavity choke valve has damping effect, can control flow, keeps stable；The outlet oil pipe is arranged on
It is common by the speed control muffler in outlet oil pipe and back pressure oil pocket close on the back pressure oil pocket of back pressure cavity choke valve
Same-action adjusts back pressure.
Beneficial effects of the present invention are：
(1) visual research of cavitation and cavitation erosion can be synchronously carried out, the accuracy of result of the test is improved；
(2) more change of current core is only needed to, the labor intensity of operating personnel is alleviated and reduces cost；
(3) present invention is simple in construction, it is easy to manufacture, easy for installation.
Brief description of the drawings
Fig. 1 is the system profile for visualizing cavity flow cavitation erosion simultaneous test device of the invention；
Fig. 2 is the schematic diagram for visualizing cavity flow cavitation erosion simultaneous test device of the invention；
Description of reference numerals：
1. the annular form 7. of 5. gravity-pressing cover plate of the clamping screw 4. of 2. oil pipeline of entrance throttle 3. sliding guide rail 6.
Flow the outlet oil pipe of 12. speed control muffler of core body 8. base, 9. flowline, 10. back pressure cavity choke valve, 11. back pressure oil pocket 13..
Embodiment
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings：
In Fig. 1, entrance throttle 1 is installed on oil pipeline 2, and oil pipeline 2 is welded as one with gravity-pressing cover plate 5
Body, makes it be moved with the movement of gravity-pressing cover plate 5.The lower end projection of gravity-pressing cover plate 5 and the annular upper end of form 6
Groove be fitted close completely, the face of cylinder and the annular internal channel right lateral surface of form 6 are completely close on the right side of stream core body 7 projection
Laminating, the rear surface of annular form 6 is fitted close completely with flowing the surface of the non-protruding part in the upper end of core body 7, stream core body 7 lower end
Surface is fitted close completely with the upper recess surface of base 8, and stream core body 7 can be changed according to different experiment demands, entered
When row parts coordinate, it is ensured that stable all in experimental rig on a vertical line, is reached on the right side of runner insertion and parts
Effect.Base 8 keeps fixing, and sliding rail 4 is fixed on the left side center section of base 8, gravity-pressing lid by screw thread technique
Plate 5 is connected with sliding rail 4, and can be moved up and down with sliding rail 4, be pressed downward gravity-pressing cover plate 5 to can not under
During pressure, gravity-pressing cover plate 5 is locked with sliding guide rail 4 using clamping screw 3, whole center section is now can ensure that
Experimental rig keeps stable.
Base 8 and flowline 9, outlet oil pipe 13 are welded as a whole, back pressure cavity choke valve 10 be arranged on flowline 9 with
On between back pressure oil pocket 11.Outlet oil pipe 13 is installed between back pressure cavity choke valve 10 and back pressure oil pocket 11, and with back pressure oil pocket
11 runners are connected, and fuel-displaced choke valve 12 is arranged in outlet oil pipe 13, common by back pressure oil pocket 11 and fuel-displaced choke valve 12
Effect regulation back pressure.
In experiment, fuel oil passes through oil pipeline 2, gravity-pressing cover plate 5 after the regulation injection pressure of entrance throttle 1
Inner passage, the annular inner passage of form 6 and the stream runner of core body 7, in the case that pressure difference is larger, stream core body 7 it is flat
Cavitation occurs for straight portion surface, can be by high-speed camera through the transparent annular progress of form 6 shooting observation, and then fuel oil is the bottom of by
8 inner passages of seat, flowline 9, back pressure cavity choke valve 10, back pressure oil pocket 11, outlet oil pipe 12, speed control muffler 13 flows out whole
Individual device.In process of the test, the regulation injection pressure of entrance throttle 1, the control stability of flow of back pressure cavity choke valve 10 can be passed through
And speed control muffler 12 and the collective effect of back pressure oil pocket 11 regulation back pressure.
Claims (8)
1. one kind visualization cavity flow cavitation erosion simultaneous test device, it is characterised in that including entrance throttle (1), oil pipeline
(2), clamping screw (3), sliding guide rail (4), gravity-pressing cover plate (5), annular form (6), stream core body (7), base (8) goes out
Oil-piping (9), back pressure cavity choke valve (10), back pressure oil pocket (11), speed control muffler (12) and outlet oil pipe (13)；
Described sliding guide rail (4) one end is fixed on base (8), and the other end passes through clamping screw (3) and gravity-pressing cover plate (5)
Left end is fixedly connected；Gravity-pressing cover plate (5) upper end is welded as a whole with oil pipeline (2), lower end and annular form (6)
Upper end is fitted close；Described be installed on the right side of oil pipeline (2) is provided with entrance throttle (1)；Under the annular form (6)
End is fitted close with stream core body (7) upper end；Stream core body (7) lower end is fitted close with base (8) upper end；Base (8) bottom
Provided with flowline (9), flowline (9) is connected with stream core body (7), annular form (6)；The other end of flowline (9)
Back pressure oil pocket (11) is connected with, back pressure cavity choke valve (10) is installed between flowline (9) and back pressure oil pocket (11)；
Outlet oil pipe (13) is additionally provided with back pressure oil pocket (11), outlet oil pipe (13) is provided with speed control muffler (12).
2. a kind of visualization cavity flow cavitation erosion simultaneous test device according to claim 1, it is characterised in that the gravity
Holddown plate (5) is cylindrical boss, and cylindrical groove, groove internal diameter and annular form are opened in the one end coordinated with annular form (6)
Internal diameter (6) is equal, and is connected with oil pipeline (2).
3. a kind of visualization cavity flow cavitation erosion simultaneous test device according to claim 1, it is characterised in that the annular
Form (6) is the transparent cylinder using acrylic plastics, and large diameter pipeline, annular form (6) upper end are driven in center
Recessing, groove internal diameter is equal with the external diameter of gravity-pressing cover plate (5) lower end projection cylinder.
4. a kind of visualization cavity flow cavitation erosion simultaneous test device according to claim 1, it is characterised in that the stream core
Body (7) is the experimental sample being made up of hydronalium, and lower end is the external diameter cylinder equal with annular form external diameter, internal
Crescent through hole is opened, upper end is cylindric matrix, and external diameter is equal with annular form internal diameter, and matrix perisporium has a flat part, base
Body perisporium along its circumferential end to end flat part and arc sections by constituting.
5. a kind of visualization cavity flow cavitation erosion simultaneous test device according to claim 4, it is characterised in that the stream core
Crescent hole size shape inside the cylinder of body (7) lower end is identical with stream core body (7) runner, and with flowing core body (7) runner
Connect.
6. a kind of visualization cavity flow cavitation erosion simultaneous test device according to claim 1, it is characterised in that the base
(8) it is cylinder, upper end recessing is allowed to fit completely with stream core body (7) lower end；Crescent hole is opened inside the base (8)
Road, size shape is identical with stream core body (7) runner, and is connected with flowline.
7. a kind of visualization cavity flow cavitation erosion simultaneous test device according to claim 1, it is characterised in that the sliding
Guide rail one end is fixed on chassis left side centre position by screw thread technique；The sliding guide rail makes to move down on gravity-pressing cover plate
It is dynamic, adjusting position.
8. a kind of visualization cavity flow cavitation erosion simultaneous test device according to claim 1, it is characterised in that the outlet
Oil pipe (13) is fitted close on the back pressure oil pocket (11) of back pressure cavity choke valve (10), by outlet oil pipe (13)
Speed control muffler (12) and back pressure oil pocket (11) collective effect regulation back pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710261777.7A CN106979901A (en) | 2017-04-20 | 2017-04-20 | One kind visualization cavity flow cavitation erosion simultaneous test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710261777.7A CN106979901A (en) | 2017-04-20 | 2017-04-20 | One kind visualization cavity flow cavitation erosion simultaneous test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106979901A true CN106979901A (en) | 2017-07-25 |
Family
ID=59344894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710261777.7A Pending CN106979901A (en) | 2017-04-20 | 2017-04-20 | One kind visualization cavity flow cavitation erosion simultaneous test device |
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| CN (1) | CN106979901A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202512048U (en) * | 2012-01-18 | 2012-10-31 | 中国水电顾问集团华东勘测设计研究院 | Pressure-resistant multilayer cavity corrosion testing device |
| CN104681110A (en) * | 2015-01-27 | 2015-06-03 | 中国核动力研究设计院 | Full-transparent visualization experiment device for rod bundle channel |
| CN105402069A (en) * | 2015-12-14 | 2016-03-16 | 江苏大学 | Testing device for visualizing cavity flow in transparent nozzle of diesel engine |
| CN105604755A (en) * | 2015-12-18 | 2016-05-25 | 江苏大学 | Testing device and method for measuring relationship between nozzle inside flow and cavitation erosion under multiple working conditions |
| CN106018143A (en) * | 2016-05-11 | 2016-10-12 | 浙江理工大学 | Design method for visualization pipeline flowing wear testing device |
| CN106053041A (en) * | 2016-06-27 | 2016-10-26 | 北京工业大学 | Testing device and testing method for improving cavitation of common rail system high pressure oil pump inlet valve |
| CN106194538A (en) * | 2016-08-17 | 2016-12-07 | 江苏大学 | A kind of back pressure that can regulate realizes the assay device of fuel injector Visualization |
-
2017
- 2017-04-20 CN CN201710261777.7A patent/CN106979901A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202512048U (en) * | 2012-01-18 | 2012-10-31 | 中国水电顾问集团华东勘测设计研究院 | Pressure-resistant multilayer cavity corrosion testing device |
| CN104681110A (en) * | 2015-01-27 | 2015-06-03 | 中国核动力研究设计院 | Full-transparent visualization experiment device for rod bundle channel |
| CN105402069A (en) * | 2015-12-14 | 2016-03-16 | 江苏大学 | Testing device for visualizing cavity flow in transparent nozzle of diesel engine |
| CN105604755A (en) * | 2015-12-18 | 2016-05-25 | 江苏大学 | Testing device and method for measuring relationship between nozzle inside flow and cavitation erosion under multiple working conditions |
| CN106018143A (en) * | 2016-05-11 | 2016-10-12 | 浙江理工大学 | Design method for visualization pipeline flowing wear testing device |
| CN106053041A (en) * | 2016-06-27 | 2016-10-26 | 北京工业大学 | Testing device and testing method for improving cavitation of common rail system high pressure oil pump inlet valve |
| CN106194538A (en) * | 2016-08-17 | 2016-12-07 | 江苏大学 | A kind of back pressure that can regulate realizes the assay device of fuel injector Visualization |
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Application publication date: 20170725 |
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