CN117589621B - Pin-disk type rotary friction wear testing system for deep sea high-pressure low-temperature environment - Google Patents
Pin-disk type rotary friction wear testing system for deep sea high-pressure low-temperature environment Download PDFInfo
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- CN117589621B CN117589621B CN202311615343.4A CN202311615343A CN117589621B CN 117589621 B CN117589621 B CN 117589621B CN 202311615343 A CN202311615343 A CN 202311615343A CN 117589621 B CN117589621 B CN 117589621B
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- 238000012360 testing method Methods 0.000 title claims abstract description 96
- 238000007789 sealing Methods 0.000 claims abstract description 67
- 239000013535 sea water Substances 0.000 claims abstract description 66
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052802 copper Inorganic materials 0.000 claims abstract description 16
- 239000010949 copper Substances 0.000 claims abstract description 16
- 238000001816 cooling Methods 0.000 claims abstract description 15
- 238000009413 insulation Methods 0.000 claims abstract description 4
- 239000002131 composite material Substances 0.000 claims description 12
- 150000001875 compounds Chemical class 0.000 claims description 6
- 239000011553 magnetic fluid Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 230000003993 interaction Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 8
- 239000000110 cooling liquid Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 2
- 239000012774 insulation material Substances 0.000 abstract description 2
- 238000004088 simulation Methods 0.000 abstract description 2
- 108010066114 cabin-2 Proteins 0.000 description 18
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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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
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0032—Generation of the force using mechanical means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0228—Low temperature; Cooling means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/023—Pressure
- G01N2203/0232—High pressure
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Abstract
The invention discloses a pin-disc type rotary friction wear testing system in a deep sea high-pressure low-temperature environment, which comprises pin-disc type friction wear testing equipment, an environment control system and a computer control system. The seawater is introduced into the sealed seawater environment test cabin, the booster is utilized to charge air into the seawater environment test cabin body through the boosting air charging port, so that the seawater is pressurized, meanwhile, the periphery of the seawater environment test cabin is provided with a cooling copper pipe, the copper pipe is filled with cooling liquid, the environment cabin can be ensured to be at the temperature required by the test condition, and the periphery of the copper pipe is coated with a heat insulation material, so that the cold insulation effect is achieved, and the complete high-pressure low-temperature seawater environment simulation test cabin is formed; in addition, the rotary loading device realizes rotary loading movement of one shaft through ingenious design, has simple and durable structure, seals the rotary loading main shaft through the corrugated pipe sealing piece, and can truly and effectively reflect the service performance of the pin-disc material in a high-pressure and low-temperature deep sea environment.
Description
Technical Field
The invention relates to the technical field of friction and wear testing in a deep sea environment, in particular to a pin disc type rotary friction and wear testing system in a high-pressure low-temperature environment in the deep sea.
Background
With the accelerated development of economy, deep sea resource development is receiving more and more attention to alleviate land resource shortage, and deep sea is under extreme environments such as high pressure, low temperature, corrosion and the like, so that various detection and exploitation mechanical components face serious tests; aiming at the material of the operating part under the environmental working condition, scientific researchers at home and abroad have invested a large amount of manpower and material resources to research and develop, most of the existing testing equipment for simulating the friction and abrasion under the deep sea environment is tested by using artificial synthetic seawater under normal pressure, and the service performance of the material in the high-pressure and low-temperature seawater environment can not be truly and effectively reflected; very few scientific researchers build friction and wear detection equipment for simulating materials in a high-pressure seawater environment, manually prepared seawater is introduced into a closed pressure container, then pressurization is carried out, and the temperature of the seawater is also increased in the pressure increasing process, so that the environment is opposite to the actual low-temperature condition of deep sea, friction forms are basically disk friction, the parallelism of friction surfaces is difficult to ensure due to the rigidity of a loading rotating shaft, and the friction test data error of the materials is large. In addition, the load of the existing test equipment (CN 116773385A) adopts an electromagnetic loading mode in a cavity, a load sensor is arranged between an electromagnetic pusher and a loading disc, the periphery of the loading disc is sealed, and as the loading disc is in a motion state at all times in the test, a sealing ring is extremely easy to wear, so that seawater is infiltrated to damage an electromagnetic loading table and the load sensor. Therefore, it is necessary to develop a pin plate friction and wear device which is simple and durable in structure and can simulate the pin plate friction and wear device under different ocean depth environments.
Disclosure of Invention
Based on the above, the invention aims to provide a pin-disk type rotary friction and wear testing system for a deep sea high-pressure low-temperature environment, which is characterized in that seawater is pumped into a closed cabin body to pressurize and cool the seawater so as to achieve a deep sea condition, and meanwhile, a main shaft is used for completing friction and wear performance testing of a material in a cavity environment in a dynamic sealing mode.
In order to achieve the purpose, the invention adopts the following technical scheme:
a pin-disc type rotary friction wear testing system in a deep sea high-pressure low-temperature environment comprises pin-disc type friction wear testing equipment, an environment control system and a computer control system;
The pin disc type friction and wear testing equipment comprises an L-shaped equipment rack, wherein a closed seawater environment testing cabin is arranged on the top surface of the transverse part of the L-shaped equipment rack, a lower sample supporting shaft is fixedly arranged at the bottom of the seawater environment testing cabin, a lower sample mounting table is arranged at the top of the lower sample supporting shaft, a dovetail groove is formed in the middle of the lower sample mounting table, a pin sample mounting block is matched and mounted in the dovetail groove and fastened through a fastening screw, pin sample mounting holes with different sizes are formed in the pin sample mounting block, and pin samples are inserted into the pin sample mounting holes; the top end of the longitudinal part of the L-shaped equipment rack is provided with a lifting sliding table which is driven by an electric push cylinder arranged at the outer side of the longitudinal part of the L-shaped equipment rack;
the seawater environment test cabin is integrally of a cylindrical structure with an opening at the top, the opening at the top is connected with a sealing cover, the center of the sealing cover is penetrated through a rotary linear guide rail to be provided with a lower rotary loading main shaft, the bottom of the lower rotary loading main shaft is provided with an upper sample disc, the bottom surface of the upper sample disc is provided with a disc sample through a positioning pin, and the disc sample is coaxial with a lower sample supporting shaft; an upper rotary loading main shaft which is longitudinally coaxial is arranged above the lower rotary loading main shaft; a torque-pressing compound sensor is arranged between the upper rotary loading main shaft and the lower rotary loading main shaft, a corrugated pipe sealing piece is coated on the lower part of the upper rotary loading main shaft and the periphery of the torque-pressing compound sensor, a lifting platform penetrating through the upper rotary loading main shaft is arranged at the top of the corrugated pipe sealing piece, the lifting platform is horizontally arranged at the bottom of a lifting sliding table positive panel, the top end of the upper rotary loading main shaft above the lifting platform is connected with the shaft end of a rotary servo motor through a coupler, and the rotary servo motor is connected with the upper part of the lifting sliding table;
The environment control system comprises a high-pressure control assembly and a low-temperature control assembly, the high-pressure control assembly comprises a boosting inflation inlet and a pressure gauge, the boosting inflation inlet and the pressure gauge are arranged at the top of a sealing cover of the seawater environment test cabin, and the boosting inflation inlet is communicated with an air outlet of a supercharger; the low-temperature control assembly comprises a cooling copper pipe coated on the periphery of the seawater environment test cabin, and an insulating layer is arranged on the periphery of the cooling copper pipe.
The computer control system is used for man-machine interaction in the testing process, the signal output end of the computer control system is electrically connected with the electric push cylinder and the rotary servo motor respectively, and the signal input end of the computer control system is electrically connected with the pressure-torsion compound sensor.
As a further improvement of the technical scheme of the invention, a U-shaped groove with an upward opening is arranged from the middle to the top end of the longitudinal part of the L-shaped equipment rack, a guide rail is arranged in the U-shaped groove, and a lifting sliding table is in sliding connection with the guide rail through a sliding block; the electric pushing cylinder is inversely installed at the bottom of the back plate of the lifting sliding table through the electric pushing cylinder installing plate.
Further, the end face of the bottom of the upper sample tray is provided with an inward concave circular sample tray, and the periphery of the circular sample tray is provided with an elastic sealing ring for fixing a sample of the tray.
Further, the lower sample support shaft is fixedly connected with the inner bottom of the seawater environment test cabin through a spline, the bottom of the lower sample support shaft is hollow, and a buffer spring is arranged in the hollow part.
Further, the opening at the top of the seawater environment testing cabin is connected with a sealing cover through a flange, a sealing ring is arranged between the sealing cover and the flange at the top of the seawater environment testing cabin, and the top of the sealing cover is fastened through a bolt fastener.
Further, a safety air release valve is arranged at the top of the sealing cover of the seawater environment testing cabin.
Further, the lower end of the corrugated pipe sealing piece is connected with a sealing cover of the seawater environment testing cabin through a flange, the upper end of the corrugated pipe sealing piece is connected with the lifting platform through a flange, and sealing rings are arranged at the joint of the flange.
Further, the upper part rotary loading main shaft is supported by a bearing, and a main shaft mounting bearing sleeve is sleeved outside the bearing.
Further, a magnetic fluid rotary sealing piece is arranged on the periphery of the part, below the bearing, of the upper part rotary loading main shaft.
Further, the pressure-torsion compound sensor is fixedly connected with the bottom end surface of the lifting platform through a sensor mounting plate.
The invention has the beneficial effects that:
1. According to the invention, seawater is introduced into the sealed seawater environment test cabin, and the booster is utilized to charge air into the seawater environment test cabin body through the boosting charging port, so that the seawater temperature in the test cabin is increased due to the boosting effect, and the actual temperature of deep sea cannot be simulated.
2. In order to realize the rotary loading motion of one shaft and facilitate sealing, the rotary loading main shaft is designed into two parts, namely an upper rotary loading main shaft and a lower rotary loading main shaft, a press-torsion composite sensor is additionally arranged between the upper rotary loading main shaft and the lower rotary loading main shaft, and bellows sealing elements are arranged on the peripheries of the press-torsion composite sensor and the upper rotary loading main shaft in a coating manner, so that the rotary loading main shaft can move in the Z-axis direction; meanwhile, the connection part of the pressure-torsion composite sensor and the rotary loading main shaft is a rotor of the sensor, so that the load size can be measured, the torque value can be measured through a rotor peripheral coil, a sensor stator is fixed on a lifting platform through a sensor mounting plate, and a large space is reserved between the sensor mounting plate and a sealing cover of a sensor and seawater environment test cabin, so that the loading and unloading test of pin/disk samples with different sizes can be satisfied; in addition, the magnetic fluid rotary sealing piece is arranged on the periphery of the part, below the bearing, of the upper part rotary loading main shaft, so that the rotary loading main shaft can be guaranteed to have good sealing performance in high-speed rotation, and a complete rotary reciprocating movement main shaft force measuring unit is formed.
3. According to the invention, the lower sample supporting shaft is fixedly connected with the inner bottom of the seawater environment testing cabin through the spline, the bottom of the lower sample supporting shaft is hollow, the hollow part is provided with the buffer spring, the lower sample supporting shaft can move up and down through the buffer spring, elastic loading can be realized during testing, and the stability of the load can be ensured for samples with uneven corrosion.
4. The lower sample mounting table is provided with the dovetail groove, the dovetail groove is internally provided with the matched pin sample mounting blocks, the pin sample mounting blocks are provided with pin sample radiuses of different sizes, the pin friction radiuses can be adjusted through the pin sample radiuses inserted into the pin sample mounting holes, and the two ends of the dovetail groove are provided with the fastening screws for positioning and fixing the pin samples, so that the stability of the pin friction radiuses is ensured.
Drawings
FIG. 1 is a front view of a pin-and-disc frictional wear testing apparatus of the present invention;
FIG. 2 is a cross-sectional view of the pin-disc frictional wear testing apparatus of the present invention;
FIG. 3 is a schematic view of the friction pair tooling assembly of FIG. 2;
FIG. 4 is a schematic diagram of the rotary reciprocating spindle force cell assembly of FIG. 2;
FIG. 5 is a schematic view of the structure of the upper sample tray;
Reference numerals: 1. an L-shaped equipment rack; 2. a seawater environment test cabin; 3. a boosting inflation inlet; 4. a bolt fastener; 5. a pressure gauge; 6. a bellows seal; 7. a lifting platform; 8. the main shaft is provided with a bearing sleeve; 9. a coupling; 10. rotating the servo motor; 11. lifting the sliding table; 12. an electric push cylinder mounting plate; 13. an electric pushing cylinder; 14. cooling the copper pipe; 15. friction pair frock assembly: 15-1, a spline, 15-2, a buffer spring, 15-3, a lower sample mounting table, 15-4, a pin sample, 15-5, a locating pin, 15-6, a disk sample, 15-7, a lower part rotary loading spindle, 15-8, a pin sample mounting block, 15-9, a fastening screw, 15-10, a lower sample supporting shaft, 15-11, a dovetail groove, 15-12, a pin sample mounting hole, 15-13, a round sample holder, 15-14, an elastic sealing ring, 15-15 and an upper sample disk; 16. the rotary reciprocating spindle force measuring unit assembly comprises a spindle force measuring unit assembly: 16-2, a press-torsion composite sensor, 16-3, a sensor mounting plate, 16-4, a magnetic fluid rotary sealing piece, 16-5, a bearing, 16-7, an upper part rotary loading main shaft, 16-8 and a rotary linear guide rail; 17. sealing cover; 18. a U-shaped groove; 19. a guide rail; 20. a sliding block.
Detailed Description
The structure and operation of the pin-disc frictional wear testing system of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1-5, the pin-disc type rotary friction wear testing system for the deep sea high-pressure low-temperature environment provided by the invention comprises pin-disc type friction wear testing equipment, an environment control system and a computer control system;
The pin disc type friction and wear testing equipment comprises an L-shaped equipment rack 1, wherein a closed seawater environment testing cabin 2 is arranged on the top surface of the transverse part of the L-shaped equipment rack 1, a lower sample supporting shaft 15-10 is fixedly arranged at the bottom in the seawater environment testing cabin 2, a lower sample mounting table 15-3 is arranged at the top of the lower sample supporting shaft 15-10, a dovetail groove 15-11 is arranged in the middle of the lower sample mounting table 15-3, a pin sample mounting block 15-8 is matched and mounted in the dovetail groove 15-11, and is fastened through a fastening screw 15-9, pin sample mounting holes 15-12 with different sizes are formed in the pin sample mounting block 15-8, and pin samples 15-4 are inserted in the pin sample mounting holes 15-12; the top end of the longitudinal part of the L-shaped equipment rack 1 is provided with a lifting sliding table 11, and the lifting sliding table 11 is driven by an electric push cylinder 13 arranged on the outer side of the longitudinal part of the L-shaped equipment rack 1;
The seawater environment test cabin 2 is integrally of a cylindrical structure with an opening at the top, a sealing cover 17 is connected to the opening at the top, a lower rotary loading main shaft 15-7 is arranged in the center of the sealing cover 17 in a penetrating manner through a rotary linear guide rail 16-8, an upper sample tray 15-15 is arranged at the bottom of the lower rotary loading main shaft 15-7, a tray sample 15-6 is arranged on the bottom surface of the upper sample tray 15-15 through a locating pin 15-5, and the tray sample 15-6 is coaxial with a lower sample supporting shaft 15-10; an upper rotary loading spindle 16-7 which is longitudinally coaxial is arranged above the lower rotary loading spindle 15-7, the upper rotary loading spindle 16-7 is supported by a bearing 16-5, a spindle mounting bearing sleeve 8 is sleeved outside the bearing 16-5, and a magnetic fluid rotary sealing piece 16-4 is arranged on the periphery of the part of the upper rotary loading spindle 16-7, which is positioned below the bearing 16-5. The pressure-torsion composite sensor 16-2 is arranged between the upper rotary loading main shaft 16-7 and the lower rotary loading main shaft 15-7, the joint of the pressure-torsion composite sensor 16-2 and the rotary loading main shaft is a rotor of the sensor, the load size can be measured, the torque value can be measured through a rotor peripheral coil, a sensor stator is fixed on the lifting platform 7 through a sensor mounting plate 16-3, and a larger space is reserved between the sensor mounting plate 16-3 and a sealing cover 17 of the sensor and sea water environment test cabin 2, so that the loading and unloading test of pin/disk samples with different sizes can be satisfied; the lower part of the upper part rotary loading main shaft 16-7 and the periphery of the pressure-torsion composite sensor 16-2 are coated with a corrugated pipe sealing piece 6, the lower end of the corrugated pipe sealing piece 6 is connected with a sealing cover 17 of the seawater environment testing cabin 2 through a flange, the upper end of the corrugated pipe sealing piece 6 is connected with the lifting platform 7 through a flange, and sealing rings are arranged at the flange connection positions. The upper part rotary loading main shaft 16-7 can move in the Z direction after being connected by the corrugated pipe sealing piece 6, the top of the corrugated pipe sealing piece 6 is provided with a lifting platform 7 penetrating through the upper part rotary loading main shaft 16-7, the lifting platform 7 is horizontally arranged at the bottom of a front panel of the lifting sliding table 11, the top end of the upper part rotary loading main shaft 16-7 above the lifting platform 7 is connected with the shaft end of a rotary servo motor 10 through a coupler 9, and the rotary servo motor 10 is connected with the upper part of the lifting sliding table 11;
The environment control system comprises a high-pressure control assembly and a low-temperature control assembly, the high-pressure control assembly comprises a boosting inflation inlet 3 and a pressure gauge 4, the boosting inflation inlet 3 and the pressure gauge 4 are arranged at the top of a sealing cover 17 of a seawater environment test cabin 2, and the boosting inflation inlet 3 is communicated with an air outlet of a supercharger through a pressure-resistant explosion-proof pipeline; the low-temperature control assembly comprises a cooling copper pipe 14 coated on the periphery of the seawater environment test cabin 2, and an insulation layer is arranged on the periphery of the cooling copper pipe 14. The cooling liquid outlet of the external cooling unit is communicated with the liquid inlet of the cooling copper pipe 14, the cooling liquid inlet is communicated with the liquid outlet of the cooling copper pipe 14, and the redundant temperature in the seawater environment test cabin 2 is circularly taken away through a compressor, so that the required low temperature in the cabin is achieved.
The computer control system is used for man-machine interaction in the testing process, the signal output end of the computer control system is electrically connected with the electric push cylinder 13 and the rotary servo motor 10 respectively, and the signal input end of the computer control system is electrically connected with the press-torsion composite sensor 16-2. The computer control system comprises a high-speed data acquisition card, a motion control card and a computer software system.
Specifically, as shown in FIG. 3, in the present invention, the lower part rotary loading spindle 15-7, the lower sample supporting shaft 15-10, the lower sample mounting table 15-3 and accessories (spline 15-1, buffer spring 15-2, pin sample 15-4, positioning pin 15-5, disk sample 15-6, pin sample mounting block 15-8, fastening screw 15-9, dovetail groove 15-11, pin sample mounting hole 15-12, circular sample holder 15-13, elastic sealing ring 15-14, upper sample disk 15-15) constitute a friction pair tool assembly 15.
As shown in FIG. 4, the upper part of the rotary loading spindle 16-7, the torque and pressure composite sensor 16-2, the sensor mounting plate 16-3, the magnetic fluid rotary sealing piece 16-4, the bearing 16-5 and the rotary linear guide rail 16-8 form a rotary reciprocating motion spindle force measuring unit assembly 16.
Specifically, a U-shaped groove 18 with an upward opening is arranged from the middle to the top end of the longitudinal part of the L-shaped equipment rack 1, a guide rail 19 is arranged in the U-shaped groove 18, and the lifting sliding table 11 is in sliding connection with the guide rail 19 through a sliding block 20; the electric pushing cylinder 13 is inversely installed at the bottom of the back plate of the lifting sliding table 11 through the electric pushing cylinder installing plate 12, the electric pushing cylinder 13 drives the lifting sliding table 11 to move up and down through the electric pushing cylinder installing plate 12, and the lifting sliding table 11 drives the rotary loading main shaft to move up and down, so that the loading and unloading rotary movement of the upper sample trays 15-15 is realized.
Specifically, the bottom end surface of the upper sample tray 15-15 is provided with an inward concave circular sample support 15-13, and the periphery of the circular sample support 15-13 is provided with an elastic sealing ring 15-14 for fixing the tray sample 15-6.
Specifically, the lower sample supporting shaft 15-10 is fixedly connected with the bottom in the seawater environment test cabin 2 through the spline 15-1, the bottom of the lower sample supporting shaft 15-10 is hollow, the hollow part is provided with the buffer spring 15-2, the lower sample supporting shaft 15-10 can move up and down through the buffer spring 15-2, elastic loading can be realized during test, and the stability of the load can be ensured for samples with uneven corrosion.
Specifically, the seawater environment test cabin 2 is formed by machining a standard-thickness high-strength stainless steel machine, the top opening of the seawater environment test cabin 2 is connected with the sealing cover 17 through the flange, a sealing ring is arranged between the sealing cover 17 and the flange at the top of the seawater environment test cabin 2, the top of the sealing cover 17 is fastened through the bolt fastening piece 4, and good and stable sealing of the flange connection position is ensured.
Specifically, since the seawater environment test chamber 2 is a high-pressure environment, a safety air release valve is further provided on the top of the sealing cover 17 of the seawater environment test chamber 2 in order to ensure the use safety thereof.
Before the test starts, the sealing cover 17 is opened, seawater is introduced into the seawater environment test cabin 2, then the sealing cover 17 is additionally arranged, and all the components are connected according to the connection relation. The external booster is utilized to charge air into the seawater environment test cabin 2 through the boosting charging port 3, so that the seawater is boosted, and the deep-sea pressure requirement is met; the external compressor and the cooling unit are started, and the circulation of the cooling liquid in the external cooling unit and the cooling copper pipe 14 is realized through the compressor, so that the redundant temperature in the seawater environment test cabin 2 is taken away, and the low temperature required by the deep sea is achieved in the cabin.
When the test is started, presetting loading force and rotation torque data of a rotation loading main shaft through a computer software system; according to the friction radius of the pin and the test requirement of the disk sample, inserting a pin sample 15-4 into a pin sample mounting hole 15-12, mounting a disk sample 15-6 at the bottom of an upper sample disk 15-15 and positioning by a positioning pin 15-5; the electric pushing cylinder 13 is started, the electric pushing cylinder 13 drives the lifting sliding table 11 to move downwards through the electric pushing cylinder mounting plate 12, and the lifting sliding table 11 drives the upper rotary loading main shaft 16-7 and the lower rotary loading main shaft 15-7 to move downwards until the disc sample 15-6 contacts with the pin sample 15-4; the rotary servo motor 10 is started, the rotary servo motor 10 rotates to drive the upper rotary loading main shaft 16-7 and the lower rotary loading main shaft 15-7 to generate rotary motion, the lower rotary loading main shaft 15-7 further drives the disk sample 15-6 to rotate, rotary friction is generated between the disk sample 15-6 and the pin sample 15-4, in the rotary friction process, the loading force and the rotary torque of the rotary loading main shaft are detected through the torque composite sensor 16-2 and fed back to a computer software system, the loading force and the rotary torque are finally adjusted to preset values, and friction data are detected through the torque composite sensor 16-2 and fed back to the computer software system to be displayed.
In summary, the seawater is introduced into the sealed seawater environment test cabin 2, the booster is utilized to charge air into the seawater environment test cabin 2 through the boosting air charging port 3, so that the seawater is pressurized, meanwhile, the periphery of the seawater environment test cabin 2 is provided with the cooling copper pipe 14, the copper pipe is filled with cooling liquid, the environment cabin can be ensured to be at the temperature required by the test condition, and the periphery of the copper pipe is coated with the heat insulation material, so that the cold insulation effect is achieved, and the complete high-pressure low-temperature seawater environment simulation test cabin is formed; in addition, the rotary loading device realizes rotary loading movement of one shaft through ingenious design, has simple and durable structure, seals the rotary loading main shaft through the corrugated pipe sealing piece 6, and can truly and effectively reflect the service performance of the pin-disc material in a high-pressure and low-temperature deep sea environment.
Claims (9)
1. The pin-disc type rotary friction wear testing system for the deep sea high-pressure low-temperature environment is characterized by comprising pin-disc type friction wear testing equipment, an environment control system and a computer control system;
The pin disc type friction and wear testing equipment comprises an L-shaped equipment rack (1), wherein a closed seawater environment testing cabin (2) is arranged on the top surface of the transverse part of the L-shaped equipment rack (1), a lower sample supporting shaft (15-10) is fixedly arranged at the inner bottom of the seawater environment testing cabin (2), a lower sample mounting table (15-3) is arranged at the top of the lower sample supporting shaft (15-10), a dovetail groove (15-11) is arranged in the middle of the lower sample mounting table (15-3), pin sample mounting blocks (15-8) are mounted in the dovetail groove (15-11) in a matched mode and are fastened through fastening screws (15-9), pin sample mounting holes (15-12) with different sizes are formed in the pin sample mounting blocks (15-8), and pin samples (15-4) are inserted in the pin sample mounting holes (15-12); the top end of the longitudinal part of the L-shaped equipment rack (1) is provided with a lifting sliding table (11), and the lifting sliding table (11) is driven by an electric push cylinder (13) arranged at the outer side of the longitudinal part of the L-shaped equipment rack (1);
The seawater environment test cabin (2) is integrally of a cylindrical structure with an opening at the top, a sealing cover (17) is connected to the opening at the top, a lower rotary loading main shaft (15-7) is arranged at the center of the sealing cover (17) in a penetrating manner through a rotary linear guide rail (16-8), an upper sample disc (15-15) is arranged at the bottom of the lower rotary loading main shaft (15-7), a disc sample (15-6) is arranged on the bottom surface of the upper sample disc (15-15) through a locating pin (15-5), and the disc sample (15-6) is coaxial with a lower sample supporting shaft (15-10); the lower sample supporting shaft (15-10) is fixedly connected with the inner bottom of the seawater environment testing cabin (2) through a spline (15-1), the bottom of the lower sample supporting shaft (15-10) is hollow, and a buffer spring (15-2) is arranged in the hollow part; an upper rotary loading main shaft (16-7) which is longitudinally coaxial is arranged above the lower rotary loading main shaft (15-7); a press-torsion composite sensor (16-2) is arranged between the upper rotary loading main shaft (16-7) and the lower rotary loading main shaft (15-7), a corrugated pipe sealing element (6) is coated on the periphery of the lower part of the upper rotary loading main shaft (16-7), a lifting platform (7) penetrating through the upper rotary loading main shaft (16-7) is arranged at the top of the corrugated pipe sealing element (6), the lifting platform (7) is horizontally arranged at the bottom of a front panel of the lifting sliding table (11), the top end of the upper rotary loading main shaft (16-7) above the lifting platform (7) is connected with the shaft end of a rotary servo motor (10) through a coupler (9), and the rotary servo motor (10) is connected with the upper part of the lifting sliding table (11);
The environment control system comprises a high-pressure control assembly and a low-temperature control assembly, the high-pressure control assembly comprises a boosting charging port (3) and a pressure gauge (5) which are arranged at the top of a sealing cover (17) of a seawater environment test cabin (2), and the boosting charging port (3) is communicated with an air outlet of a supercharger; the low-temperature control assembly comprises a cooling copper pipe (14) coated on the periphery of the seawater environment test cabin (2), and an insulation layer is arranged on the periphery of the cooling copper pipe (14);
The computer control system is used for man-machine interaction in the testing process, the signal output end of the computer control system is electrically connected with the electric push cylinder (13) and the rotary servo motor (10) respectively, and the signal input end of the computer control system is electrically connected with the press-torsion compound sensor (16-2).
2. The pin-disc type rotary friction wear testing system for the deep sea high-pressure low-temperature environment according to claim 1 is characterized in that a U-shaped groove (18) with an upward opening is formed from the middle to the top end of the longitudinal part of the L-shaped equipment rack (1), guide rails (19) are arranged on two sides of the U-shaped groove (18), and a lifting sliding table (11) is in sliding connection with the guide rails (19) through sliding blocks (20); the electric pushing cylinder (13) is inversely arranged at the bottom of the back plate of the lifting sliding table (11) through the electric pushing cylinder mounting plate (12).
3. The pin-disc type rotary friction wear testing system for the deep sea high-pressure low-temperature environment according to claim 1, wherein the bottom end surface of the upper sample disc (15-15) is provided with an inward concave circular sample support (15-13), and the periphery of the circular sample support (15-13) is provided with an elastic sealing ring (15-14) for fixing a disc sample (15-6).
4. A pin-disc type rotary friction wear testing system for a high-pressure low-temperature environment in deep sea according to any one of claims 1-3, wherein the top opening of the seawater environment testing chamber (2) is connected with a sealing cover (17) through a flange, a sealing ring is arranged between the sealing cover (17) and the flange at the top of the seawater environment testing chamber (2), and the top of the sealing cover (17) is fastened through a bolt fastener (4).
5. A pin-disc type rotary friction wear testing system for a deep sea high pressure and low temperature environment according to any one of claims 1-3, wherein a safety air release valve is further arranged at the top of the sealing cover (17) of the seawater environment testing chamber (2).
6. A pin-disc type rotary friction wear test system for a deep sea high pressure low temperature environment according to any one of claims 1-3, wherein the lower end of the corrugated pipe sealing member (6) is connected with the sealing cover (17) of the sea water environment test cabin (2) through a flange, the upper end of the corrugated pipe sealing member (6) is connected with the lifting platform (7) through a flange, and sealing rings are arranged at the flange connection positions.
7. A deep sea high pressure low temperature environment pin disc type rotary friction wear test system as claimed in any one of claims 1-3, wherein the upper part rotary loading main shaft (16-7) is supported by a bearing (16-5), and the bearing (16-5) is sleeved with a main shaft mounting bearing sleeve (8).
8. A deep sea high pressure low temperature environment pin disc type rotary friction wear testing system according to claim 7, wherein the upper part rotary loading main shaft (16-7) is provided with a magnetic fluid rotary sealing member (16-4) at the periphery of the part below the bearing (16-5).
9. A pin-disc type rotary friction wear testing system for a deep sea high pressure low temperature environment according to any one of claims 1-3 and 8, wherein the press-torsion compound sensor (16-2) is fixedly connected with the bottom end surface of the lifting platform (7) through a sensor mounting plate (16-3).
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