CN209485687U - Experimental rig for the high DN value bearing fatigue life of ultralow temperature - Google Patents
Experimental rig for the high DN value bearing fatigue life of ultralow temperature Download PDFInfo
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- CN209485687U CN209485687U CN201920389157.6U CN201920389157U CN209485687U CN 209485687 U CN209485687 U CN 209485687U CN 201920389157 U CN201920389157 U CN 201920389157U CN 209485687 U CN209485687 U CN 209485687U
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Abstract
Experimental rig for the high DN value bearing fatigue life of ultralow temperature.The utility model composition includes: device housing, device housing and axial elasticity loading device, the connection of radial compliance loading device, axial elasticity loading device, radial compliance loading device is connect with test rotor respectively, testing rotor includes main shaft, subject bearing is installed on main shaft, supporting process bearing, 2 loading process bearings, axle sleeve, it is sealed between main shaft and end cap by leather cup sealing member, the power transmission set with through-hole is installed between axial elasticity loading device and subject bearing outside, subject bearing outside and preceding gland are connected through a screw thread a subject bearing outer ring and fix, subject bearing outside is connect with preceding intermediate sleeve, preceding intermediate sleeve is connect with prelocalization lid.The utility model, which is realized, simulates cryogenic bearing real-world operation operating condition in cryogenic liquid rocket engine turbopump, including environment temperature, load, revolving speed and cooling flow are consistent or close with actual condition.
Description
Technical field:
The utility model relates to a kind of experimental rigs for the high DN value bearing fatigue life of ultralow temperature.
Background technique:
The high DN value bearing of ultralow temperature is cryogenic liquid rocket engine key component, not only due to its designing technique content
Height, development difficulty is big, and more important is in cryogenic liquid Test System for Rocket Engine Test, 50% or more failure is that turbine pump causes,
The quality of turbine pump and the reliability of engine are closely related.Revolving speed is the most important design parameter of turbine pump, turbine pump
Theoretical efficiency is improved with the increase of revolving speed, and the weight of turbine pump also reduces therewith.The raising of revolving speed is limited by bearing first
Technical level, the DN value (diameter of axle x revolving speed, unit mm.r/min) of bearing are the main indicators of bearing technology level, and DN value is bigger,
Design difficulty is higher.Currently, domestic Production of bearing producer does not have the fatigue life test under low temperature environment, after bearing is delivered,
By the design of cryogenic liquid rocket engine, producer directly assembles that engine is directly tested or design experiment device is to simulate axis
It holds working speed, environment temperature, cooling flow and load in turbine pump and carries out room temperature bearing test.
Current bearing fatigue life test generally directly tests bearing using directly assembly engine, though it can be with
Bearing is more accurately examined, once bearing fault occurs, causes turbine pump to damage, experimentation cost is higher.Using cold test,
The cooling medium of bearing is that room temperature medium, the operating condition of test such as water cannot examine the self-lubricating property of cryogenic bearing, contact angle, trip
The reasonability of the parameter of structure design such as gap, guide clearance, spin to roll ratio and contact stress, cannot examine load, cooling flow etc. because
Influence of the element to bearing life.
Utility model content:
The purpose of the utility model is to provide a kind of experimental rigs for the high DN value bearing fatigue life of ultralow temperature, realize
Simulate cryogenic bearing real-world operation operating condition in cryogenic liquid rocket engine turbopump, including environment temperature, load, revolving speed and cold
But flow is consistent or close with actual condition.
Above-mentioned purpose is realized by following technical scheme:
A kind of experimental rig for the high DN value bearing fatigue life of ultralow temperature, composition includes: device housing, described
Device housing is connect with axial elasticity loading device, radial compliance loading device, the axial elasticity loading device, described
Radial compliance loading device is connect with test rotor respectively, and the test rotor includes main shaft, is equipped on the main shaft
It is tested bearing, supporting process bearing, 2 loading process bearings, axle sleeves, passes through leather cup sealing member between the main shaft and end cap
Sealing is equipped with the power transmission set with through-hole, the quilt between the axial elasticity loading device and subject bearing outside
Examination bearing outside and preceding gland are connected through a screw thread and the subject bearing outer ring are fixed, and the subject bearing outside is with before
Intermediate sleeve connection, the preceding intermediate sleeve are connect with prelocalization lid, and the prelocalization Gai Yujin medium pipeline one communicates, described
Radial compliance loading device fork carried by diameter apply radial pull to diameter load and put on, the diameter carries in set and is equipped with 2 institutes
The loading process bearing stated passes through the device housing into medium pipeline two and passes through radial one sealing of bellows component, institute
The diameter stated carries the upper through-hole of set and communicates with described into medium pipeline two, and the supporting process bearing outside has rear intermediate sleeve,
Through-hole in the rear intermediate sleeve is communicated with into medium pipeline three.
The experimental rig for the high DN value bearing fatigue life of ultralow temperature, described in the subject bearing and 2
Loading process bearing centre distance L1 < described in loading process bearing centre described in supporting process bearing and 2 away from
From L2.
The experimental rig for the high DN value bearing fatigue life of ultralow temperature, one end of the subject bearing have
The other end of fore bearing locknut, the subject bearing has the axle sleeve；One end of the supporting process bearing has
The other end of rear bearing locknut, the supporting process bearing has the axle sleeve, rear pressing cover.
The experimental rig for the high DN value bearing fatigue life of ultralow temperature, the cup packing component is by skin
Bowl, stainless steel dottle pin and gland composition, the spindle end take three cup packings, using stainless between per pass cup packing
The isolation of steel dottle pin, leather cup use Polytetrafluoroethyl-ne -ne based Composites Filled with Graphite, are interference fitted with test rotor.
The experimental rig for the high DN value bearing fatigue life of ultralow temperature, the axial elasticity loading device packet
Axial closed shell is included, the axial closed shell is connect with the axial piston bucket of prelocalization lid, axially loaded cylinder respectively, before described
Locating cover is connect by the preceding intermediate sleeve with the shell, and the axially loaded cylinder includes axial piston, O-ring
With the axial piston bucket, the axially loaded cylinder is connect with axial force transducer, the axial force transducer with
Axial transfer block connects, the axial transfer block outer layer covers heating tape, and Pt100 heat is equipped in the axial transfer block
Resistance one, the axial transfer block are connect with the transmission rod of axial load soft readjustment device, transmission rod and transition mandril point
Face contact, the transition mandril are connect with axial bellows seal assembly, the axial bellows seal assembly and prelocalization lid
Connection.
The experimental rig for the high DN value bearing fatigue life of ultralow temperature, the axial bellows seal assembly packet
Axial large flange, axial small flange are included, is welded with diaphragm one between the axial large flange and the small flange of axial direction.
The experimental rig for the high DN value bearing fatigue life of ultralow temperature, the radial compliance loading device packet
Include radial closed shell, the radial closed shell is connect with radial loaded cylinder, the radial loaded cylinder include radial piston and
Radial piston bucket, the radial loaded cylinder are connect with radial force sensor, and tension sensor is connect with radial transfer block, institute
The radial transfer block outer layer covers heating tape stated is equipped with Pt100 thermal resistance two, the radial direction in the radial transfer block
Transfer block is threadedly coupled with rod head, and rod head passes through radial pin and connect with radial pull bar, the radial pull
Bar is connect with radial bellows component two, and the radial bellows component two is connect with the device housing.
The experimental rig for the high DN value bearing fatigue life of ultralow temperature, the radial bellows component one
Including radial large flange, radial small flange, diaphragm two is welded between the radial large flange and the small flange of radial direction.
The utility model has the advantages that
The utility model experimental rig simulates liquid oxygen, liquid methane or liquid hydrogen environment temperature in turbine pump using liquid nitrogen medium,
Using pneumatically loading mode, the load working condition of turbine pump middle (center) bearing is simulated, gear-box speedup is dragged by threephase asynchronous machine and is driven
Dynamic test device simulates turbine pump middle (center) bearing working speed to test speed.The design of experimental rig follows following principle: (1)
Main structure must have enough stiffness and strength, generate the influence of vibration in high speed rotation to reduce；(2) device housing
Material has to and is tested bearing same material or the temperature shrinkage rate of material is consistent；(3) the radial load ratio > of experimental rig
1:1, the high DN value bearing fatigue life test device of ultralow temperature can simulate angular contact in cryogenic liquid rocket engine turbopump
Ball bearing and three-point contact ball bearing actual condition are tested, reliability with higher, and subject bearings D N value reaches as high as
300×104mm.r/min.Experimental rig is designed as rigid rotator, within the scope of design speed, can be realized stepless ascending, descending speed.
The utility model experimental rig can go up and down at any time load by axially and radially loading device, realize that simulation is started
The working environment of bearing when machine variable working condition.Under cryogenic media environment, not only high reliablity is loaded using cylinder, damping can also be provided
Effect, reduces the vibration of loading device.
Utility model device shell is that casting is had using the material same or similar with subject bearing linear expansion coefficient
Enough stiffness and strength, to reduce the vibration of rotating machinery process generation.During test, each spare part is that gap is matched
It closes, the high speed rotation for testing rotor generates high-frequency vibration, to reduce the vibration of subject bearing and supporting process bearing to device housing
Erosion is tested at position of bearings and supporting process position of bearings in device housing and installs a preceding intermediate sleeve and rear intermediate sleeve additional.If
Intermediate sleeve and subject bearing outside, save the cost before only being needed to change when vibration erosion is more serious between preceding intermediate sleeve and subject bearing outside
With the shortening tooling process-cycle.
The utility model is based on implosion test rotor principle, and misaligns caused dynamic loading to reduce, and experimental rig is adopted
It is designed with single-station test principle.It tests on rotor, is tested position of bearings close to axial elasticity loading device, supporting process
Bearing is located between the two close to driving end, loading process bearing, and is biased to subject bearing (i.e. L1 < L2).Loading process bearing
It is pre-tightened using positioning firmly beforehand means.Experimental rig inner cavity is in low temperature environment, and environment temperature is more stable, pre- using positioning
Tightly have axial arrangement simple, the axial assembly space needed is smaller, and test rotor axial structure is more compact.
The utility model axial load soft readjustment device has the function of that adjustment axis carries direction of transfer, by putting face twice
After contact carries out direction adjustment, it is ensured that axis suffered by subject bearing carries consistent with axis direction.Axial elasticity loading device is applied
Add axis to be loaded onto power transmission set, is loaded onto subject bearing by being tested bearing outside, supporting process axis is finally reached by main shaft, axle sleeve
It holds.Subject bearing outside plays a subject bearing outer ring amplification, convenient for load.
The utility model radial load flexibility loading device carries fork application pulling force to diameter load by diameter and puts on, and diameter carries fork and adds
It carries to set and be assembled by pin, pin and pin hole are clearance fit, guarantee that entire diameter carries application process as flexible load.
Detailed description of the invention:
Attached drawing 1 is the structural schematic diagram of the utility model.
Attached drawing 2 is the structural schematic diagram of the utility model test rotor.
Attached drawing 3 is the structural schematic diagram of the utility model axial elasticity loading device.
Attached drawing 4 is the structural schematic diagram of the utility model axial direction bellows seal assembly.
Attached drawing 5 is the structural schematic diagram of the utility model axial load soft readjustment device.
Attached drawing 6 is the structural schematic diagram of the utility model radial compliance loading device.
Attached drawing 7 is the structural schematic diagram of the utility model radial direction bellows component.
Attached drawing 8 is the structural schematic diagram of the utility model power transmission set.
Attached drawing 9 is the utility model cooling medium discharge schematic diagram.
Attached drawing 10 is the A-A cross-sectional view of the utility model attached drawing 9.
Attached drawing 11 is the structural schematic diagram of the utility model static load fork.
In attached drawing: 1: device housing；2: preceding gland；3: preceding intermediate sleeve；4: subject bearing outside；5: subject bearing；6: passing
Power set；7: into medium pipeline one；8: fore bearing locknut；9: radial bellows component；10: into medium pipeline two；11: blanking cover；
12: axle sleeve；13: into medium pipeline three；14: rear bearing locknut；15: main shaft；16: loading process bearing；17: rear pressing cover；18: after
Intermediate sleeve；19: supporting process bearing；20: stainless steel dottle pin；21: leather cup；22: gland；23: test rotor；24: radial compliance
Loading device；25: axial elasticity loading device；26: diameter carries set；27: diameter carries screw；28: diameter carries fork；29: round end pin；30:
Axial piston；31:O type circle；32: axial piston bucket；33: axial force transducer；34:Pt100 thermal resistance one；35: axial switching
Head；36: transmission rod；37: transition mandril；38: axial closed shell；39: prelocalization lid；40: axial bellows seal assembly；41: axial
Large flange；42: diaphragm one；43: axial small flange；44: radial piston bucket；45: radial piston；46: radial closed shell；47: radial
Force snesor；48:Pt100 thermal resistance two；49: radial adapter；50: rod head；51: radial pin；52: radial pull
Bar；53: radial small flange；54: diaphragm two；55: radial large flange；56: stainless steel gasket；57: radial bellows component two.
Specific embodiment:
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is a part of the embodiment of the utility model, instead of all the embodiments.Based on the reality in the utility model
Apply example, those of ordinary skill in the art's every other embodiment obtained without making creative work, all
Belong to the range of the utility model protection.
Embodiment 1:
It is provided by the embodiment of the utility model a kind of for the high DN value bearing fatigue life of ultralow temperature as shown in attached drawing 1,2
Experimental rig, experimental rig by axial elasticity loading device 25, radial compliance loading device 24, device housing 1, test rotor
23 and cup packing component composition.
Since experimental rig carries out assembly and centering at normal temperature, entire experimental rig can be cooled under cryogenic media environment
It shrinks, i.e., the center height of experimental rig generates sedimentation.And the actuator for driving experimental rig to rotate is swollen as revolving speed increases meeting heat
Swollen, thermal expansion and sedimentation value are all different under different rotating speeds and vibration level.The generation misaligned can apply one to experimental rig
A dynamic loading causes the reliability of experimental rig to reduce.To reduce dynamic loading suffered by experimental rig as far as possible, experimental rig is based on
Implosion test rotor design principle, is designed using single-station test principle.
Testing rotor 23 includes the support system that a subject bearing 5 and a supporting process bearing 19 form, and two add
Carry the radial load loading system and axle sleeve 12, fore bearing locknut 8 and rear bearing locknut 14 that technique bearing 16 forms.By turning
Subdynamics calculate, and determine front and back support span (L1+L2) for meeting assembly space requirement and test speed requirement.Test rotor
It is designed as rigid rotator, for test speed using first critical speed as optimization aim, arrangement radial load applies point.Radial compliance adds
It carries to set 24 and carry by 28 application radial pulls of diameter load fork to diameter and cover on 26, since diameter load set 26 is loaded larger, in diameter load set 26
Two loading process bearings 16 are assembled, share diameter load jointly.Subject bearing 5 is that diameter carries by reaction.Apply since diameter carries
Subject 5 side of bearing is biased in position, i.e. L1 < L2, therefore, 19 force in radial of supporting process bearing is lower than subject bearing 5.Either simplex
Position design principle is mainly reflected in diameter suffered by supporting process bearing 19 and carries lower than subject bearing 5.Loading process bearing 16 is taken fixed
Pressure firmly beforehand means are pre-tightened.Preload process adjusts pretightning force suffered by loading process bearing 16 using stainless steel gasket 13 and diameter carries
The axial position of set 26 after determining loading process bearing two sides stainless steel gasket thickness, compresses diameter using blanking cover 11 and carries set 26.Diameter
It carries fork 28 and diameter carries set 26 and assembled by diameter load screw 27.Diameter carries fork 28 and radial compliance loading device 24 passes through round head pin
Nail 29 is assembled.
The axial load of experimental rig is loaded by axial elasticity loading device 25.25 pairs of test dresses of axial elasticity loading device
Offer thrust is provided, loading procedure by twice point face contact adjust axial load in, guarantee loading direction and test turn
It is sub axial with preferable centering.Apply axis and be loaded onto power transmission set 6, axis load is applied to by power transmission set 6 by subject bearing outside 4,
Subject bearing outside 4 and preceding gland 2 are connected through a screw thread a subject bearing outer ring and fix, and play amplification subject 5 outer ring ruler of bearing
Very little effect applies convenient for load.Finally, load reaches subject 5 inner ring of bearing by 5 outer ring of subject bearing, completes subject bearing
The application of axial load.Load is transferred to 19 outer ring of supporting process bearing through subject 5 inner ring of bearing, main shaft 15 and axle sleeve 12.Together
Sample, rear intermediate sleeve 18 and rear pressing cover 17 are connected through a screw thread supporting process bearing (19) outer ring and fix, and play amplification support work
The effect of 19 outer ring of skill bearing.Finally, it is axially loaded to complete supporting process bearing 19.
Cup packing component is made of leather cup 21, stainless steel dottle pin 20 and gland 22.Cup packing has structure simple,
Using and it is easy to maintenance, it is at low cost.Three cup packings are taken in shaft end, between per pass cup packing using stainless steel dottle pin 20 every
From.Leather cup 21 uses Polytetrafluoroethyl-ne -ne based Composites Filled with Graphite, is interference fitted with test rotor 23, in experimental rig
Low pressure precooling process plays the role of static seal, reduces coefficient of friction at high speed.
Embodiment 2:
As shown in figures 3-5, provided by the embodiment of the utility model a kind of for the high DN value bearing fatigue life of ultralow temperature
Experimental rig, axial piston 30, O-ring 31 and axial piston bucket 32 collectively constitute axially loaded cylinder.Axially loaded cylinder
Thrust is generated under compressed air effect, axial transfer block 35, axial 35 outer layer of transfer block are reached by axial force transducer 33
Heating tape is wrapped up, for protecting axial force transducer 33 to be in normal temperature environment, Pt100 thermal resistance 1 is for monitoring axial direction in real time
35 temperature of transfer block.Axial force is reached transmission rod 36 by axial transfer block 35, and transmission rod 36 and transition mandril 37 are point face contact,
Play the role of adjusting axial force.Axial force finally reaches axial bellows seal assembly 40, and axial bellows seal assembly not only has
There is sealing function to can also compensate for axial displacement.Axial closed shell 38 and prelocalization lid 39 are for connecting and fixing cylinder and device housing
1.Axial bellows seal assembly is made of axial large flange 41, axial small flange 43 and diaphragm 1.Diaphragm 1 and axial direction are big
It is formed between flange 41, axial small flange 43 using electron beam welding.
Embodiment 3:
As shown in Figures 6, 7, provided by the embodiment of the utility model a kind of for the high DN value bearing fatigue life of ultralow temperature
Experimental rig, radial piston 44 and radial piston bucket 45 form radial loaded cylinder.Radial loaded cylinder senses radial force
Device generates pulling force, and pulling force is reached radial transfer block 49, radial 49 outer layer covers heating tape of transfer block, for protecting diameter by sensor
It is in normal temperature environment to force snesor 47, Pt100 thermal resistance 2 48 is for monitoring radial 49 temperature of transfer block in real time.Radial switching
Block 49 and rod head 50 are connected through a screw thread transmitting pulling force.Pulling force is reached radial drawing by radial pin 51 by rod head 50
Power bar 52, radial bellows component 9 play the role of sealing and bit shift compensation.Radial closed shell is for connecting radial cylinder and device
Shell 1.
Embodiment 4:
As shown in Fig. 11, provided by the embodiment of the utility model a kind of for the high DN value bearing fatigue life of ultralow temperature
Experimental rig, the utility model have the characteristics that boiling point is extremely low using cryogenic media, and the cooling flow of bearing is supplied by low level, high
Position discharge.Since cryogenic media has the lower characteristic of boiling point, it is tested bearing, loading process bearing and supporting process bearing
Cooling medium imports device housing inner cavity, finally by screwing in pressure inlet discharge above device housing.
Embodiment 5:
The test method of the experimental rig for the high DN value bearing fatigue life of ultralow temperature,
Experimental rig for the high DN value bearing fatigue life of ultralow temperature is assembled, after the assembly is completed, by axial soft
Property loading device be loaded onto nominal axes load, then specified diameter is loaded by radial compliance loading device and is carried, simulate cryogenic liquid rocket
It is loaded that engine turbine pumps middle (center) bearing institute, after completing load, by into medium pipeline one, into medium pipeline two, into medium pipeline
Three provide the cooling medium of certain small flow, and experimental rig is pre-chilled, and are pre-chilled 30 minutes and guarantee subject bearing outer wall temperature
Close to cryogenic media temperature, cryogenic media temperature differs within 5 DEG C with medium boiling point, and pre-cooling terminates；Adjust into medium pipeline one,
Into medium pipeline two, into medium pipeline three into rate-of flow to metered flow, start experimental rig and operate to test speed, simulation
Turbine pump middle (center) bearing cooling flow and working speed.
Test process provides cooling stream into medium pipeline one using the environment temperature of liquid nitrogen simulation turbine pump for subject bearing
Amount, medium covers flow direction subject bearing by power transmission and is cooled down, final to import device housing inner cavity, and power transmission puts on reserved spray medium
Through-hole, pitch diameter is close with subject bearing pitch diameter where through-hole, and it is preferable cooling to guarantee that subject bearing has；Into medium
Pipeline two provides cooling for loading process bearing, and cooling flow, which enters in diameter load set, flows to two sides loading process bearing, imports dress
Set housing cavity；Cooling is provided for supporting process bearing into medium pipeline three, through supporting process bearing medium after cooling, is imported
Device housing inner cavity；Due to directly carrying set assembly with diameter into medium pipeline two, test rotor can be generated in loading procedure to support
The axial displacement in technique bearing direction, by between medium pipeline two and device housing using radial bellows component, it is close
Cryogenic media in seal apparatus housing cavity.
Embodiment 6:
A kind of experimental rig for the high DN value bearing fatigue life of ultralow temperature provided in this embodiment, the examination in this programme
The medium that experiment device is applicable in includes liquid nitrogen, liquid oxygen, liquid methane, liquid hydrogen and liquid helium.It is tested bearing specification type and technique bearing
Specification type same case and same case is not suitable for this programme.Such as: subject bearing specification is B7211, loading process axis
Hold optional B7208, the optional B7208 of supporting process bearing；Subject bearing specification be QJS206, the optional B7206 of loading process bearing,
The optional B7206 of supporting process bearing；Subject bearing specification is B7206, the optional B7206 of loading process bearing, supporting process bearing
Optional B7206.
Caused dynamic loading is misaligned to reduce cryogenic test equipment transmission process, is tested bearing far from driving end, with list
The experimental rig that station test principle is designed is suitable for this programme.
Claims (8)
1. a kind of experimental rig for the high DN value bearing fatigue life of ultralow temperature, composition include:
Device housing, it is characterized in that: the device housing is connect with axial elasticity loading device, radial compliance loading device,
The axial elasticity loading device, the radial compliance loading device connects with test rotor respectively, the test turn
Attached bag includes main shaft, and subject bearing, supporting process bearing, 2 loading process bearings, axle sleeves are equipped on the main shaft, described
Main shaft and end cap between by leather cup sealing member seal, the axial elasticity loading device and subject bearing outside between pacify
Equipped with the power transmission set with through-hole, the subject bearing outside and preceding gland are connected through a screw thread outside the subject bearing
Circle is fixed, and the subject bearing outside is connect with preceding intermediate sleeve, and the preceding intermediate sleeve is connect with prelocalization lid, before described
Locating cover is communicated with into medium pipeline one, and the radial compliance loading device carries fork by diameter and applies radial pull to diameter load set
On, the diameter carry be equipped with 2 in set described in loading process bearing, pass through the device housing into medium pipeline two and lead to
It crosses radial bellows component one to seal, the diameter carries the upper through-hole of set and communicates with described into medium pipeline two, described
Supporting process bearing outside has rear intermediate sleeve, and the through-hole in the rear intermediate sleeve is communicated with into medium pipeline three.
2. the experimental rig according to claim 1 for the high DN value bearing fatigue life of ultralow temperature, it is characterized in that: described
Subject bearing with described in supporting process bearing described in loading process bearing centre distance L1 < described in 2 and 2
The distance L2 of loading process bearing centre.
3. the experimental rig according to claim 2 for the high DN value bearing fatigue life of ultralow temperature, it is characterized in that: described
One end of subject bearing there is fore bearing locknut, the other end of the described subject bearing has the axle sleeve；The branch
The one end for supportting technique bearing has rear bearing locknut, and the other end of the supporting process bearing has the axle sleeve, rear pressure
Lid.
4. the experimental rig according to claim 3 for the high DN value bearing fatigue life of ultralow temperature, it is characterized in that: described
Cup packing component be made of leather cup, stainless steel dottle pin and gland, the spindle end takes three cup packings, in per pass
It is isolated between cup packing using stainless steel dottle pin, leather cup uses Polytetrafluoroethyl-ne -ne based Composites Filled with Graphite, with test rotor
It is interference fitted.
5. the experimental rig according to claim 4 for the high DN value bearing fatigue life of ultralow temperature, it is characterized in that: described
Axial elasticity loading device include axial closed shell, the axial closed shell axis with prelocalization lid, axially loaded cylinder respectively
It is connected to piston bucket, the prelocalization lid is connect by the preceding intermediate sleeve with the shell, and described is axially loaded
Cylinder includes axial piston, O-ring and the axial piston bucket, and the axially loaded cylinder and axial force transducer connect
It connects, the axial force transducer is connect with axial transfer block, the axial transfer block outer layer covers heating tape, the axis
Pt100 thermal resistance one, the transmission rod of the axial transfer block and axial load soft readjustment device are installed in transfer block
Connection, transmission rod and transition mandril point face contact, the transition mandril are connect with axial bellows seal assembly, the axial direction
Bellows component is connect with prelocalization lid.
6. the experimental rig according to claim 5 for the high DN value bearing fatigue life of ultralow temperature, it is characterized in that: described
Axial bellows seal assembly include axial large flange, axial small flange, the axial large flange and the small method of axial direction
Diaphragm one is welded between orchid.
7. the experimental rig according to claim 4 for the high DN value bearing fatigue life of ultralow temperature, it is characterized in that: described
Radial compliance loading device include radial closed shell, the radial closed shell is connect with radial loaded cylinder, and the radial direction adds
Carrier gas cylinder includes radial piston and radial piston bucket, and the radial loaded cylinder is connect with radial force sensor, pull sensing
Device is connect with radial transfer block, the radial transfer block outer layer covers heating tape, is equipped in the radial transfer block
Pt100 thermal resistance two, the radial transfer block are threadedly coupled with rod head, and rod head passes through radial pin and radial drawing
The connection of power bar, the radial pull bar are connect with radial bellows component two, the radial bellows component two and
The device housing connection.
8. the experimental rig according to claim 7 for the high DN value bearing fatigue life of ultralow temperature, it is characterized in that: described
Radial bellows component one include radial large flange, radial small flange, the radial large flange and the radial direction are small
Diaphragm two is welded between flange.
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| CN201920389157.6U CN209485687U (en) | 2019-03-26 | 2019-03-26 | Experimental rig for the high DN value bearing fatigue life of ultralow temperature |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109975022A (en) * | 2019-03-26 | 2019-07-05 | 北京宇航推进科技有限公司 | Experimental rig and test method for the high DN value bearing fatigue life of ultralow temperature |
| CN111024393A (en) * | 2019-12-10 | 2020-04-17 | 蓝箭航天技术有限公司 | Low-temperature bearing test measurement and control system |
| CN112345243A (en) * | 2020-10-26 | 2021-02-09 | 西北工业大学深圳研究院 | Rolling bearing ultralow-temperature working condition environment simulation device |
| CN113375935A (en) * | 2021-04-25 | 2021-09-10 | 北京航天动力研究所 | Device and method for accurately measuring loading force of ultralow-temperature equipment |
-
2019
- 2019-03-26 CN CN201920389157.6U patent/CN209485687U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109975022A (en) * | 2019-03-26 | 2019-07-05 | 北京宇航推进科技有限公司 | Experimental rig and test method for the high DN value bearing fatigue life of ultralow temperature |
| CN109975022B (en) * | 2019-03-26 | 2024-04-16 | 北京宇航推进科技有限公司 | Test device and test method for fatigue life of ultralow-temperature high-DN-value bearing |
| CN111024393A (en) * | 2019-12-10 | 2020-04-17 | 蓝箭航天技术有限公司 | Low-temperature bearing test measurement and control system |
| CN112345243A (en) * | 2020-10-26 | 2021-02-09 | 西北工业大学深圳研究院 | Rolling bearing ultralow-temperature working condition environment simulation device |
| CN113375935A (en) * | 2021-04-25 | 2021-09-10 | 北京航天动力研究所 | Device and method for accurately measuring loading force of ultralow-temperature equipment |
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