CN102507166B - Bilaterally-charging high-pressure dynamic-seal test bed and test method - Google Patents
Bilaterally-charging high-pressure dynamic-seal test bed and test method Download PDFInfo
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- CN102507166B CN102507166B CN201110313349.7A CN201110313349A CN102507166B CN 102507166 B CN102507166 B CN 102507166B CN 201110313349 A CN201110313349 A CN 201110313349A CN 102507166 B CN102507166 B CN 102507166B
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Abstract
The invention relates to a bilaterally-charging high-pressure dynamic-seal test bed and a test method, which are used for petroleum and gas exploitation of deep wells and high-pressure dynamic-seal test research of motors and submarines in deep sea. The bilaterally-charging high-pressure dynamic-seal test bed mainly comprises a speed-up system, a seal-cavity balance system, a circulating system and a signal acquisition system, wherein the speed-up system mainly comprises a motor, a frequency converter, a gear accelerating box and a buffer cylinder; the seal-cavity balance system mainly comprises a hand pump, a balance cylinder, a seal cavity, a hollow shaft and two groups of mechanical seals; the circulating system mainly comprises an electric pressure test pump, a buffer tank, a piston-adjustable reducing valve, a circulating pump and a water tank; the signal acquisition system mainly comprises an encapsulation thermoelectric couple, a torque sensor, a micro displacement sensor, a data acquisition card and a computer. The test method mainly comprises six steps. In the invention, the balance system formed by the scheme of the invention can simulate the working state of a mechanical seal under a high-pressure condition, and can perform signal acquisition, so as to well know the working state of the mechanical seal.
Description
Technical field
The present invention relates to a kind of bilateral pressurising high pressure dynamic sealing testing table and test method, the high pressure dynamic sealing experimental study for deep-well petroleum natural gas extraction, deep-sea motor and submarine, belong to the simulated test facility under artificial environment.
Background technology
Mechanical seal is as a kind of rotary dynamic seal; the fields such as petrochemical complex, electric power, boats and ships, space flight have been widely used at present; protect speed reduction unit and bearing with motive seal in turbodrilling; deep-sea motor and deep water robot will protect motor with motive seal; once, so sealing was lost efficacy, tend to cause great economic loss.Common mechanical seal working pressure is all lower, mission life is longer, but under deep-well and these hyperbaric environments of deep-sea, sealing will be born the pressure of tens MPas, conventional one-sided pressurized type sealing mechanism is impossible work, usually be all the pressure reduction that lubricating oil that opposite side in mechanical seal is filled with a little higher than pressure medium comes the balanced seal both sides, by pressure balance mechanism, guarantee that the pressure of lubricating oil is all the time higher than pressure medium.
Existing motive seal test, due to the restriction of structural design and power input sealing PV value, causes the high-potting of motive seal that certain problem is arranged:
Although 1, testing table pressure meets the requirement of leakage test, can not work long hours, be mainly to be far longer than the maximum PV value of encapsulant commonly used due to the PV value that power input shaft place high pressure dynamic sealing produces; This class testing table is mainly used to do the seal break-off test simultaneously, can not coordinate the duty of sensor Real-time Collection seal face; Although 2, the leakage test platform of one-sided pressurising can long time running, and can collect the signals such as the temperature of sealing surface and moment of torsion, test pressure is all very low, and with the test condition under hyperbaric environment, comparing has larger gap; 3, the conventional method of test sealing surface friction torque is all mounting torque sensor between motor and bearing seat, because medium in power input O-ring seal and annular seal space stirs, can produce very large reactive torque, so the error ratio that the survey of this method comes is larger.
Summary of the invention
The object of the invention is to overcome the prior art deficiency, on the basis of the existing testing table of analysis-by-synthesis, provides under a kind of high pressure operating mode and can work long hours and a kind of bilateral pressurising high pressure dynamic sealing testing table and the test method of more accurate collection terminal surface information.
Technical scheme of the present invention is: a kind of bilateral pressurising of the present invention high pressure dynamic sealing testing table mainly comprises acceleration system, annular seal space balanced system, the circulation system and signal acquiring system.
Described acceleration system mainly is comprised of motor, frequency converter, gear speedup case and cushion cylinder.By the Frequency Converter Control motor with lower rotating speed input gear gearbox, thereby obtain the high rotating speed of test mechanical sealing on tubular shaft, the gear increaser casing communicates with a cushion cylinder, the pressure instability that the gear in the available buffer gearbox generates heat and causes.
Described annular seal space balanced system mainly is comprised of pitcher pump, compensating cylinder, annular seal space, tubular shaft and two groups of mechanical seals.Described mechanical seal is comprised of rotating ring and stationary ring, by pitcher pump, in compensating cylinder, injects lubricating oil, through high pressure line, enters in gear speedup case, then by tubular shaft, enters in the cavity of test stationary ring and stationary seat composition; Motor test pump is filled with the compensating cylinder opposite side by high-pressure medium, then enters in annular seal space, with the lubricating oil in the cavity of testing stationary ring and stationary seat formation, forms first balance; Lubricating oil in gear speedup case and the high-pressure medium in annular seal space form second balance by the mechanical seal at adapter sleeve place simultaneously.
The described circulation system mainly is comprised of motor test pump, surge tank, adjustable piston reduction valve, ebullator and water tank.Inject high-pressure medium by motor test pump in surge tank, after buffering is stable, inject annular seal space, get back in the water tank left side after the adjustable piston reduction valve decompression finally arranged through the annular seal space outlet, form a closed circuit; Enter the condenser pipe in gearbox after ebullator water suction, lubricating oil is carried out after cooling getting back in the water tank right side, form another loop.
Described signal acquiring system mainly is comprised of encapsulation thermopair, torque sensor, microdisplacement sensor, data collecting card, computing machine.Indirectly record amount of spring compression by the microdisplacement sensor, in conjunction with the stiffness factor of spring, record the seal face specific pressure; Record the temperature of seal face by encapsulation thermopair and temperature transmitter; Two-direction thrust bearing has limited the axial freedom of test stationary ring, by stationary seat and little axle, can be delivered to torque sensor to the friction torque of test rotating ring and test stationary ring, is fixed the friction torque that bearing records test stationary ring and test rotating ring sealing surface.
The test method of a kind of bilateral pressurising of the present invention high pressure dynamic sealing mainly comprises the following steps:
1. switch on power, then open computer and signal acquiring system, check the connection of sensor and capture card, the initial stage work that settling signal gathers;
2. start the acquisition interface of microdisplacement sensor, rotate the handwheel of regulating screw mandrel and carry out hydrodynamic reciprocating sealing chamber base, annular seal space integral body can move on adapter sleeve, thereby regulated obtaining amount of spring compression on tubular shaft, test pressure is according to actual needs adjusted the specific contact pressure of test sealing ring, guarantee that specific contact pressure is not less than 0.8Mpa, and preserve the displacement signal gathered;
3. slowly with pitcher pump, in the compensating cylinder left side, be filled with lubricating oil, lubricating oil enters gear speedup case through pipeline, then by tubular shaft, be filled with in the cavity of test stationary ring and stationary seat composition, open the stop valve of gear increaser box top and discharge air, when oil is emerged from the cut-off valve port, close stop valve;
4. continue to press pitcher pump to oil-filled in compensating cylinder left side, until pressure, be elevated to while approaching 0.8Mpa, start motor test pump and be filled with high-pressure medium with low discharge in annular seal space, the top hole pressure of regulating piston adjustable compression release valve, realize that high-pressure medium is identical with lubricating oil pressure, keep a kind of dynamic balance;
5. starter motor and frequency converter, by the Frequency Converter Control motor, with lower rotating speed input gear gearbox, tubular shaft drives the rotation of test rotating ring after speedup, then starts the temperature that the ebullator recirculated cooling water stablize the interior lubricating oil of gear speedup case;
6. start collecting temperature and torque signal after the testing table normal operation, temperature comprises inboard and the outside two paths of signals of testing stationary ring, collects the temperature of test stationary ring end face by encapsulation thermopair and temperature transmitter; By stationary seat and little axle, moment of torsion is delivered to torque sensor, thereby collects the friction torque of sealing surface, complete the experimental test task.
Beneficial effect of the present invention and advantage are as follows:
1, can guarantee that the PV value of power input shaft place high pressure dynamic sealing generation is less than the maximum PV value of encapsulant by motor, frequency converter and gear speedup case; 2, motive seal under high pressure can work long hours, and can more fully understand the Frotteurism be sealed in real work; 3, by two-direction thrust bearing, the friction torque of sealing surface is delivered to outside annular seal space, has overcome the large shortcoming of conventionally test friction torque error, can record more accurately the friction torque of sealing surface.4, the balanced system that this programme forms can the simulated high-pressure operating mode under the duty of mechanical seal, and can carry out in real time the collection of signal, understand better the duty of mechanical seal end surface.
The accompanying drawing explanation
Fig. 1 is the principle schematic of a kind of bilateral pressurising of the present invention high pressure dynamic sealing testing table and test method;
Fig. 2 is structural representation of the present invention;
Fig. 3 is the schematic diagram of signals collecting conceptual design of the present invention;
Fig. 4 is the schematic diagram of gearbox of the present invention and syndeton.
In figure: 1. motor, 2. cushion cylinder, 3. adjustable piston reduction valve, 4. stop valve, 5. gear speedup case, 6. mechanical seal, 7. annular seal space, 8. tubular shaft, 9. mechanical seal, 10. encapsulation thermopair, 11. torque sensor, 12. encapsulation thermopair, 13. data collecting card, 14. computing machine, 15. microdisplacement sensor, 16. compensating cylinder, 17. pitcher pump, 18. surge tank, 19. ebullator, 20. frequency converter, 21. motor test pump, 22. water tank, 23. adapter sleeve, 24. hold-down support, 25. adjusting screw mandrel, 26. annular seal space base, 27. two-direction thrust bearing, 28. stationary seat, 29. little axle, 30. test stationary ring, 31. test rotating ring, 32. spring, 33. rotating ring, 34. stationary ring.
Embodiment
In Fig. 1, Fig. 2, Fig. 3, Fig. 4, a kind of bilateral pressurising of the present invention high pressure dynamic sealing testing table, mainly comprise acceleration system, annular seal space balanced system, the circulation system and signal acquiring system.
In Fig. 1, described acceleration system mainly is comprised of motor 1, frequency converter 20, gear speedup case 5 and cushion cylinder 2.Control motor 1 with lower rotating speed input gear gearbox 5 by frequency converter 20, thereby obtain the high rotating speed of test rotating ring 31 on tubular shaft 8, gear speedup case 5 communicates with cushion cylinder 2, the pressure instability that the gear heating in available buffer gearbox 5 causes.
In Fig. 1, Fig. 3 and Fig. 4, described annular seal space balanced system mainly is comprised of pitcher pump 17, compensating cylinder 16, annular seal space 7, tubular shaft 8 and two groups of mechanical seals (6,9).Described mechanical seal 6 is comprised of rotating ring 33 and stationary ring 34, described mechanical seal 9 is comprised of test stationary ring 30 and test rotating ring 31, inject lubricating oil by pitcher pump 17 in compensating cylinder 16, then enter gear speedup case 5 through high pressure line, then enter by tubular shaft 8 in the cavity of test stationary ring 30 and stationary seat 28 compositions; Motor test pump 21 is filled with compensating cylinder 16 opposite sides by high-pressure medium, then enters in annular seal space 7, with the lubricating oil in the cavity of testing stationary ring 30 and stationary seat 28 formation, forms first balance; Lubricating oil in gear speedup case 5 and the high-pressure medium in annular seal space 7 form second balance by the mechanical seal 6 at adapter sleeve 23 places simultaneously.
In Fig. 1 and Fig. 2, the described circulation system mainly is comprised of motor test pump 21, surge tank 18, adjustable piston reduction valve 3, ebullator 19 and water tank 22.Inject high-pressure medium by motor test pump 21 in surge tank 18, after buffering is stable, inject annular seal space 7, after adjustable piston reduction valve 3 decompressions that finally arrange through annular seal space 7 outlets, in water tank 22 left sides, form a closed circuit; Enter the condenser pipe in gearbox 5 after ebullator 19 water suction, lubricating oil is carried out after cooling getting back in water tank 22 right sides, form another loop.
In Fig. 2 and Fig. 3, described signal acquiring system mainly is comprised of encapsulation thermopair (10,12), torque sensor 11, microdisplacement sensor 15, data collecting card 13 and computing machine 14.Record the decrement of test spring 32 by microdisplacement sensor 15, in conjunction with the stiffness factor of spring 32, obtain the face pressure information in 9 of mechanical seals; By the encapsulation thermopair 10 and 12 and temperature transmitter record the test stationary ring 30 the end face temperature; Two-direction thrust bearing 27 has limited the axial freedom of test stationary ring 30, so can be drawn out to torque sensor 11 to the friction torque of test stationary ring 30 and test rotating ring 31 by little axle 29, then be fixed the friction torque that bearing 24 records test stationary ring 30 and test rotating ring 31 sealing surfaces.
The test method of a kind of bilateral pressurising of the present invention high pressure dynamic sealing mainly comprises the following steps:
1. switch on power, open computer 14 and signal acquiring system, check the connection of sensor and data collecting card 13, the initial stage work that settling signal gathers;
2. start the acquisition interface of microdisplacement sensor 15, rotate the handwheel of regulating screw mandrel 25 and carry out hydrodynamic reciprocating sealing chamber base 26, annular seal space 7 integral body can move on adapter sleeve 23, realization is regulated the decrement of tubular shaft 8 upper springs 32, test pressure is according to actual needs adjusted the specific contact pressure of mechanical seal 9, guarantee that specific contact pressure is not less than 0.8Mpa, and preserve the signal curve gathered;
3. slowly with pitcher pump 17, in compensating cylinder 16 left sides, be filled with lubricating oil, lubricating oil enters gear speedup case 5 through pipeline, then by tubular shaft 8, be filled with in the cavity of test stationary ring 30 and stationary seat 28 compositions, open the stop valve 4 at gear speedup case 5 tops and discharge air, when oil is emerged from the outlet of stop valve 4, close stop valve 4;
4. continue to press pitcher pump 17 to oil-filled in compensating cylinder 16 left sides, when the tensimeter registration approaches 0.8Mpa, start motor test pump 21 and be filled with high-pressure medium with low discharge in annular seal space 7, the top hole pressure of regulating piston adjustable compression release valve 3, realize that high-pressure medium is identical with lubricating oil pressure, keeps a kind of mobile equilibrium;
5. starter motor 1 and frequency converter 20, adjust motor 1 with lower rotating speed input gear gearbox 5 by frequency converter 20, tubular shaft 8 drives 31 rotations of test rotating ring after speedup, then starts ebullator 19 and carrys out recirculated cooling water, stablizes the temperature of gear speedup case 5 interior lubricating oil;
6. start collecting temperature and torque signal after testing table normal operation, temperature comprises inboard and the outside two paths of signals of test stationary ring 30, by encapsulation thermopair 10 and 12 and temperature transmitter collect the temperature curve of testing stationary ring 30 end faces; By stationary seat 28 and little axle 29, the friction torque of test stationary ring 30 and test rotating ring 31 is delivered to torque sensor 11, thereby collects the friction torque curve, complete the experimental test task.
Claims (2)
1. a bilateral pressurising high pressure dynamic sealing testing table, mainly comprise acceleration system, annular seal space balanced system, the circulation system and signal acquiring system, it is characterized in that: described acceleration system mainly is comprised of motor (1), frequency converter (20), gear speedup case (5) and cushion cylinder (2), described annular seal space balanced system is mainly by pitcher pump (17), compensating cylinder (16), annular seal space (7), tubular shaft (8), the first mechanical seal (6) and the second mechanical seal (9) form, described the first mechanical seal (6) is comprised of rotating ring (33) and stationary ring (34), described the second mechanical seal (9) is comprised of test stationary ring (30) and test rotating ring (31), inject lubricating oil by pitcher pump (17) in compensating cylinder (16), then enter gear speedup case (5) through high pressure line, by tubular shaft (8), enter in the cavity of test stationary ring (30) and stationary seat (28) composition again, motor test pump (21) is filled with compensating cylinder (16) opposite side by high-pressure medium, then enters in annular seal space (7), and the lubricating oil interior with the cavity of test stationary ring (30) and stationary seat (28) formation forms first balance, the first mechanical seal (6) that lubricating oil in gear speedup case (5) and the high-pressure medium in annular seal space (7) are located by adapter sleeve (23) simultaneously forms second balance, the described circulation system mainly is comprised of motor test pump (21), surge tank (18), adjustable piston reduction valve (3), ebullator (19) and water tank (22), described signal acquiring system is mainly by encapsulation thermopair (10,12), torque sensor (11), microdisplacement sensor (15), data collecting card (13) and computing machine (14) form, two-direction thrust bearing (27) has limited the axial freedom of test stationary ring (30), so can be drawn out to torque sensor (11) to the friction torque of test stationary ring (30) and test rotating ring (31) by little axle (29), then be fixed the friction torque that bearing (24) records test stationary ring (30) and test rotating ring (31) sealing surface.
2. the test method of a bilateral pressurising high pressure dynamic sealing testing table as claimed in claim 1, it is characterized in that: described test method mainly comprises the following steps:
start the inboard of collecting test stationary ring (30) and the friction torque signal of outside two-way temperature signal and the second mechanical seal (9) after the testing table normal operation, complete the experimental test task.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110313349.7A CN102507166B (en) | 2011-10-17 | 2011-10-17 | Bilaterally-charging high-pressure dynamic-seal test bed and test method |
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| CN201110313349.7A CN102507166B (en) | 2011-10-17 | 2011-10-17 | Bilaterally-charging high-pressure dynamic-seal test bed and test method |
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| CN102507166B true CN102507166B (en) | 2014-01-08 |
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