CN202083602U - Experimental device for researching anti-cavitation performance of coating - Google Patents
Experimental device for researching anti-cavitation performance of coating Download PDFInfo
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- CN202083602U CN202083602U CN2011200432473U CN201120043247U CN202083602U CN 202083602 U CN202083602 U CN 202083602U CN 2011200432473 U CN2011200432473 U CN 2011200432473U CN 201120043247 U CN201120043247 U CN 201120043247U CN 202083602 U CN202083602 U CN 202083602U
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Abstract
The utility model relates to an experimental device for researching anti-cavitation performance of coating; liquid drops with high temperature and high pressure are impacted with a test sample rotating at high speed to simulate blade cavitation phenomenon in a closed tank body. A direct-current motor serves as prime power to quicken rotating speed through a gear accelerator so as to drive a rotating disc loaded with the test sample to rotate at high speed and cause water jet to be jetted out from a nozzle after the water jet is heated by an induction coil and to axially impact with the test sample. Due to the adoption of a drainage system, a vacuum-pumping system and a hygrometric system, the experiment can be carried out normally and continuously in a work environment similar to the practical environment. In the utility model, the change of form of the coating on the surface of the test sample and the metallographical texture can be researched under a working environment with high-temperature and high-pressure wet steam so as to provide basic experimental data for researching anti-cavitation performance of coating.
Description
Technical field
The utility model relates to the research of material anti-cavitation performance, is specifically related to a kind of experimental provision of studying the coating anti-cavitation performance.
Background technology
Steam turbine is widely used in fields such as electric power, naval vessels, aircraft industry as a kind of common power machine.The stability of its operation and mission life depend on to a great extent its blade reliably whether.The working environment of blade is more abominable, bear the impact of high velocity air and drop for a long time.Under the acting in conjunction of cavitation and fatigue, the blade surface material damage is also peeled off, and whole blade is scrapped after being damaged to a certain degree, need in time change.The cost of blade is very high, uses again after if can repairing the blade of local erosion damage again, will save production cost greatly undoubtedly.At present, many researchers have carried out experimental exploring in this field both at home and abroad, have proposed different blade restorative procedures such as soldering, argon arc welding, thermal spray, electric spark and laser melting coating.Wherein, laser melting coating is because of having the automaticity height, easily programming Control and repair layer can realize that with the blade matrix characteristics such as metallurgical binding are state-of-the-art a kind of methods during present blade is repaired, and therefore the research that reaches the anti-cavitation performance of other coatings for the turbine blade laser cladding layer has crucial meaning.
And at present can the research material anti-cavitation performance research relevant device seldom, people are at the material of selecting to use under the High Temperature High Pressure wet steam environment, general normal experiment device static or low flow velocity or the dependence experience of relying on, might cause the very fast inefficacy of material owing to selection is improper like this, cause economic loss, even also can cause personal injury.Therefore a kind of cavitation process that can as far as possible simulate in the actual production of utility model, thus the experimental provision that is implemented in the laboratory research experiment and carries out the assessment of performance has important meaning for the anti-cavitation performance research that is in material under the industrial environment condition.
The utility model content
The utility model purpose just provides and a kind ofly can be in the cavitation experimental assembly of High Temperature High Pressure wet steam environment by simulation material in actual operating conditions, thereby the coating cavitation-resistance is made the experimental provision of assessment.
The utlity model has following advantage:
Because the nozzle that the utility model adopted is provided with air intake opening, water inlet and heat induced circle and airshed, discharge and heating-up temperature are all controlled, can guarantee that the current that penetrate satisfy the required condition of experiment; Can assess the anti-cavitation performance of multiple material simultaneously; The utility model cost is low in addition, is easy to promote.
A kind of experimental provision of studying the coating anti-cavitation performance, it comprises switch board 1 and the direct current generator 2 that links to each other with switch board 1, direct current generator 2 is fixed on casing 12 outer walls, the output terminal of direct current generator 2 is positioned at casing 12 inside, the output terminal of direct current generator 2 links to each other with gear accelerator 16 by positive coupling 3, the other end of gear accelerator 16 links to each other with axle 5 by positive coupling 4, the end of axle 5 is fixedly connected with rotating disk 7, axle 5 is fixing by two plain bearing housings 6 at two ends, plain bearing housing 6 supports by the back up pad 9 that is fixed on the casing 12, be equipped with the groove that is used to install sample 8 on the rotating disk 7, the protective cover 15 that prevents that current from flashing is arranged at rotating disk 7 tops, and position relative with sample 8 on the protective cover 15 also is equipped with nozzle 10, and nozzle 10 places are equipped with heat induced circle 22, casing 12 is connected with the vacuum pump 18 of bleeding, by variable valve 24 controls, casing 12 is connected with hygrostat 17 in addition, by variable valve 23 controls, unwatering pump 11 is installed in the lower end of casing 12, regulates by variable valve 26;
Described nozzle 10 is provided with air intake opening Q1, water inlet Q2, and water inlet Q2 links to each other with feed pump 19, and feed pump 19 can be controlled discharge, and water inlet Q2 is positioned at the afterbody of nozzle 10; Air intake opening Q1 becomes 30～60 degree with the angle that the axis of nozzle 10 forms, and links to each other with air compressor 14, and air compressor 14 can be controlled air inflow; The head of nozzle 10 is equipped with heat induced circle 22, and heat induced circle 22 can be controlled the current temperature, guarantees that the current that penetrate can reach the required requirement of experiment;
Described sample 8 matrix materials are the blade common used material, and width is 20～40mm, length 40～80mm, and thickness 5～15mm, it is 20～40mm that there is length on sample top apart from edge 10～20mm place, and width is 10～20mm, and thickness is the coating of 0.5～3mm.Nozzle 10 aligns with the separatrix of coating with matrix, (8) 4～16 on sample, and symmetry is installed on the rotating disk 7.
Described rotating disk 7 diameters 150～300mm, thickness 10～30mm.Outer rim at disk 7 goes out to have length 20～40mm, width 5～15mm, the groove of dark 20～60mm, it is the through hole of 4～10mm that groove has diameter at distance rotating disk 7 external diameters 5～15mm place, the number of groove is 4～16, guarantees to carry out simultaneously the research of a plurality of sample anti-cavitation performances.
The utility model is by in airtight casing, and sample high speed rotating and drop clash into, and the working environment of simulation turbine blade is studied the variation of coating surface form, and the experimental data on basis is provided for the assessment of coating anti-cavitation performance.
Description of drawings
Fig. 1 is an one-piece construction synoptic diagram of the present utility model.
Fig. 2 is the three-view diagram of sample 8 in the utility model.
Fig. 3 is two views of the utility model turntable 7.
Fig. 4 is the synoptic diagram of nozzle 10 in the utility model
Among the figure: 1. switch board, 2. direct current generator, 3. shaft coupling, 4. shaft coupling, 5. bearing, 6. plain bearing housing, 7. rotating disk, 8. sample, 9. back up pad, 10. nozzle, 11. draining valve, 12. casings, 13. operation valves, 14. air compressor, 15. protective cover, 16. gear accelerators, 17. hygrostats, 18. vacuum pumps of bleeding, 19. feed pump, 20. water tanks, 21. thermometers, 22. heat induced circles, 23. variable valve, 24. variable valve, 25. variable valve, 26. variable valve.
Embodiment
Below in conjunction with accompanying drawing structural principle of the present utility model and principle of work are described in further details:
Referring to Fig. 1, the direct current generator 2 that comprises switch board 1 and link to each other with switch board, direct current generator 2 are positioned at cabinet exterior as prime mover, by switch board 1 its rotating speed of control, start and stop.The output terminal of direct current generator 2 is positioned at box house, direct current generator 2 output terminals link to each other with gear accelerator 16 by positive coupling 3, gear accelerator 16 links to each other with another positive coupling 4 again, driving rotating disk 7 by bearing 5 rotates, bearing 5 is fixing by two plain bearing housings 6, plain bearing housing 6 supports by the back up pad 9 that is fixed on casing 12, sample 8 is the blade common used material for base material, sample is width 30mm, length 60mm, the thin plate of thickness 10mm, sample are 12, and symmetry is installed on the rotating disk 7.Rotating disk 7 is diameter 200mm, the disk of thickness 20mm.Outer rim at disk 7 goes out to have length 30mm, width 10mm, and the groove of dark 20mm, the number of groove is 12, it is the through hole of 6mm that groove has diameter at distance rotating disk 7 external diameter 10mm places.Can fix sample by through hole, guarantee sample 8 rotating disk 7 that under the situation of high speed rotating, can not fly out.Rotating disk 7 tops have protective cover 15 to prevent that current from flashing, be equipped with nozzle 10 on the protective cover 15 simultaneously, this nozzle 10 is corresponding with sample 8 positions, nozzle 10 places are equipped with heat induced circle 22, current are heated to more than 85 ℃, nozzle 10 links to each other with feed pump 19 simultaneously, also be equipped with operation valve 13 between nozzle 10 and the feed pump 19, operation valve 13 is by switch board 1 control, nozzle 10 links to each other with air compressor 14, pressure in the casing is that 0.55mpa also is provided with variable valve 25 and thermometer 21 between feed pump 19 and water tank 20, and water tank 20 1 ends link to each other with unwatering pump 11, constitute a circulation system.Casing 12 also is connected with the vacuum pump 18 of bleeding by vacuum breaker 24, and casing 12 also links to each other with hygrostat 17 by hygrometric variable valve 23, and the humidity of measuring when needed in the casing 12 is provided with draining control valve 26 between the lower end of casing 12 installation unwatering pump 11 casings 12 and unwatering pump 11.
Sample 8 will clean up surperficial grease with acetone before the experiment, makees the vacuum breaker 24 before the vacuum pump 18 of bleeding the time is opened in experiment earlier, opens the hygrometric variable valve 23 of hygrostat 17 fronts.Start the 18 pairs of casings 12 of vacuum pump of bleeding then and vacuumize, start feed pump 19 feedwater simultaneously, start induction coil 22 and heat, the humidity that starts in 17 pairs of casings of hygrostat 12 detects.In casing 12, reach certain vacuum tightness, and water drops vaporize, the vacuum breaker 24 of closing vacuum pump 18 fronts of bleeding, the vacuum pump 18 of bleeding out of service.Start direct current generator 2 by DC MOTOR CONTROL cabinet 1, direct current generator 2 drives rotating disk 7 by the shaft coupling 4 that links to each other with gear accelerator 16 and rotates, after rotating disk 7 stabilizations of speed, open feed pump 19 and operation valve 25, experiment begins to carry out, open draining control valve 26 successively when casing 12 water levels arrive certain altitude, unwatering pump 11 carries out draining.
During experiment is carried out, can take off sample 8 at any time and observe its configuration of surface and cavitation effect.
Direct current motor 2 rated speeds that the utility model is selected for use are 1300rpm, can not reach the rotating speed under the turbine blade normal operation circumstances, therefore adding a gear accelerator 16 improves rotating speed, and the speed ratio of gear accelerator is 4, can satisfy the required condition of experiment.And casing 12 vacuumizes before experiment in order to reduce because wheel disk rotation and the power of motor that windage is consumed so just can be chosen the less motor of relative power, has increased security.The generation of water droplet is supplied with by feed pump 19, the water supply control valve 25 of feed pump 19 fronts is in order to keep the stable of pipeline hydraulic pressure and to measure pressure by operation valve 13, the thermometer 21 of feed pump front is that the pipeline water temperature is detected, and the effect of hygrostat 17 is the humidity of measuring in the casing.Along with constantly carrying out of experiment, the water level of casing 12 can be more and more higher, needs unwatering pump 11 to take water away a part, and the variable valve 26 of unwatering pump 11 fronts is when preventing that unwatering pump 11 is out of service in the aqueous reflux cartonning.
Can simulate the approximate working environment of last stage vane of steam turbine by the utility model in the experiment, sample high speed rotating and drop bump, the research coating is by the progressive formation of cavitation, obtain under equivalent environment, the difference of the specimen surface form of different coating changes, contrast draws the quality of different coating anti-cavitation performance, and the experimental data on basis is provided for the assessment of material anti-cavitation performance.
Claims (3)
1. experimental provision of studying the coating anti-cavitation performance, it is characterized in that: comprise switch board (1) and the direct current generator (2) that links to each other with switch board (1), direct current generator (2) is fixed on casing (12) outer wall, the output terminal of direct current generator (2) is positioned at casing (12) inside, the output terminal of direct current generator (2) links to each other with gear accelerator (16) by positive coupling (3), the other end of gear accelerator (16) links to each other with axle (5) by positive coupling (4), the end of axle (5) is fixedly connected with rotating disk (7), axle (5) is fixing by two plain bearing housings (6) at two ends, plain bearing housing (6) supports by the back up pad (9) that is fixed on the casing (12), rotating disk is equipped with the groove that is used to install sample (8) on (7), the protective cover (15) that prevents current and flash is arranged at rotating disk (7) top, protective cover (15) is gone up the position relative with sample (8) nozzle (10) also is installed, nozzle (10) locates to be equipped with heat induced circle (22), casing (12) is connected with the vacuum pump of bleeding (18), control by variable valve (24), casing (12) is connected with hygrostat (17) in addition, control by variable valve (23), unwatering pump (11) is installed in the lower end of casing (12), regulates by variable valve (26);
Described nozzle (10) is provided with air intake opening Q1, water inlet Q2, and water inlet Q2 links to each other with feed pump (19), and feed pump (19) can be controlled discharge, and water inlet Q2 is positioned at the afterbody of nozzle (10); Air intake opening Q1 becomes 30～60 degree with the angle that the axis of nozzle (10) forms, and links to each other with air compressor (14), and air compressor (14) can be controlled air inflow; The head of nozzle (10) is equipped with heat induced circle (22), and heat induced circle (22) can be controlled the current temperature;
Feed pump (19), unwatering pump (11) all link to each other with water tank (20), also are connected with variable valve (25) and thermometer (21) between feed pump (19) and the water tank (20).
2. the experimental provision of research coating anti-cavitation performance according to claim 1 is characterized in that: the diameter of described rotating disk (7) is 150～300mm, thickness 10～30mm; Described groove is positioned at the outer rim of disk (7), its long 20～40mm, and wide 5～15mm, dark 20～60mm, it is the through hole of 4～10mm that groove has diameter at distance rotating disk (7) external diameter 5～15mm place, the number of groove is 4～16.
3. the experimental provision of research coating anti-cavitation performance according to claim 1, it is characterized in that: described sample (8) matrix material is the turbine blade common used material, width is 20～40mm, length 40～80mm, thickness 5～15mm, it is 20～40mm that there is length on sample top apart from edge 10～20mm place, and width is 10～20mm, and thickness is the coating of 0.5～3mm; Nozzle (10) aligns with the separatrix of coating with matrix, can contrast the anti-cavitation performance of matrix and coating, and sample (8) quantity is 4～16, and symmetry is installed on the rotating disk (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200432473U CN202083602U (en) | 2011-02-21 | 2011-02-21 | Experimental device for researching anti-cavitation performance of coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200432473U CN202083602U (en) | 2011-02-21 | 2011-02-21 | Experimental device for researching anti-cavitation performance of coating |
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| Publication Number | Publication Date |
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| CN202083602U true CN202083602U (en) | 2011-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011200432473U Expired - Fee Related CN202083602U (en) | 2011-02-21 | 2011-02-21 | Experimental device for researching anti-cavitation performance of coating |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018124A (en) * | 2012-11-28 | 2013-04-03 | 北京矿冶研究总院 | High-speed high-temperature abradable testing machine for sealing coating and experimental method |
| CN104819904A (en) * | 2015-01-14 | 2015-08-05 | 南京航空航天大学 | Quantitative evaluation method for laser cladding remanufacturing product heat injury feature |
| CN106904292A (en) * | 2017-04-09 | 2017-06-30 | 中国人民解放军海军航空工程学院青岛校区 | A kind of detecting system of laboratory reappearance environment to aircraft structural damage |
| CN107121263A (en) * | 2017-05-24 | 2017-09-01 | 浙江理工大学 | A kind of high speed inducer low temperature cavitation experimental provision |
-
2011
- 2011-02-21 CN CN2011200432473U patent/CN202083602U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018124A (en) * | 2012-11-28 | 2013-04-03 | 北京矿冶研究总院 | High-speed high-temperature abradable testing machine for sealing coating and experimental method |
| CN104819904A (en) * | 2015-01-14 | 2015-08-05 | 南京航空航天大学 | Quantitative evaluation method for laser cladding remanufacturing product heat injury feature |
| CN106904292A (en) * | 2017-04-09 | 2017-06-30 | 中国人民解放军海军航空工程学院青岛校区 | A kind of detecting system of laboratory reappearance environment to aircraft structural damage |
| CN106904292B (en) * | 2017-04-09 | 2023-11-03 | 中国人民解放军海军航空工程学院青岛校区 | Detection system for damage of laboratory reproduction environment to aircraft structure |
| CN107121263A (en) * | 2017-05-24 | 2017-09-01 | 浙江理工大学 | A kind of high speed inducer low temperature cavitation experimental provision |
| CN107121263B (en) * | 2017-05-24 | 2023-06-06 | 浙江理工大学 | Low-temperature cavitation experimental device for high-speed inducer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111221 Termination date: 20130221 |