CN107367387A - The axial static friction testing device of ball bearing and elastic bearing under low temperature environment - Google Patents
The axial static friction testing device of ball bearing and elastic bearing under low temperature environment Download PDFInfo
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- CN107367387A CN107367387A CN201610320178.3A CN201610320178A CN107367387A CN 107367387 A CN107367387 A CN 107367387A CN 201610320178 A CN201610320178 A CN 201610320178A CN 107367387 A CN107367387 A CN 107367387A
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- bearing
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- low temperature
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/04—Bearings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The present invention relates to ball bearing under a kind of low temperature environment and the axial static friction testing device of elastic bearing, suitable for cryogenic liquid rocket engine turbopump field, it can also be used to other low-temperature rotary mechanical fields.Assistor is fixed on support frame, and two displacement transducers are fixed on support frame；Insulation cover includes cover heat-insulation layer, cover, U-shaped card slot and cover handle, and U-shaped card slot and cover handle are welded on cover, and cover heat-insulation layer is bonded on cover；Heat-preservation cylinder includes cylinder handle, cylinder heat-insulation layer, barrel, cylinder bottom and T-slot bearing, and cylinder handle, barrel, cylinder bottom and T-slot bearing are welded as a whole, and barrel is provided with inverted L-type neck, and cylinder heat-insulation layer is bonded on barrel and cylinder bottom；T-shaped slide rail is welded with support frame, T-shaped slide rail coordinates the fixation realized to heat-preservation cylinder with T-slot bearing.Present invention can be implemented in being tested under low temperature environment the stiction of ball bearing and elastic bearing, the Rational choice for both gaps provides data foundation.
Description
Technical field
The present invention relates to ball bearing under a kind of low temperature environment and the axial static friction testing device of elastic bearing,
Suitable for cryogenic liquid rocket engine turbopump field, it can also be used to other low-temperature rotary mechanical fields.
Background technology
Bearing and the support key component that elastic bearing is high speed rotor, are widely used in each of rotating machinery field
Individual industry.The Rational choice in bearing and elastic bearing radial fit gap for bearing reliably working to closing weight
Will, especially for high-power cryogenic liquid rocket engine turbopump.In such turbine pump, during work
Bearing outside collar should be made not produce relative sliding friction with elastic bearing circumferential direction as far as possible, to avoid rubbing
Overheat and cause cooling medium vaporization or the generation of bearing guide clearance large change.It is simultaneously as high-power
Turbine pump axial force is larger, it is necessary to requires that rotor-support-foundation system exists using axial force balance system, when the system works
Axial direction can move freely, and not so bearing will be caused to bear larger axial force and cause the destruction of bearing, this
Also imply that the axial friction between bearing and elastic bearing again can not be excessive.Therefore, bearing and elasticity
The fit clearance Rational choice of supporting is with regard to extremely difficult.
For cryogenic liquid rocket engine turbopump, carried out at normal temperatures for the ease of bearing and elastic bearing
Assembly and disassembly, generally coordinated between the two from gap, elastic bearing is from linear expansion coefficient higher than outside bearing
The material of lasso.Under low-temperature working environment, due to the difference of both material at low temperature amounts of contraction, fit clearance
It is changed into interference fit, makes that there is certain radial tightening power between the two.Therefore, at the initial stage of design with regard to non-
Often it is necessary to measure both axial stiction under working environment.Current existing bearing measuring
Device concentrates on the measurement to bearing overall performance and circumferential static friction torque under normal temperature or low temperature environment, still lacks
The axial static friction testing device of weary low temperature environment lower bearing and elastic bearing.
The content of the invention
In order to solve the problems, such as that cryogenic engine bearing and the selection of elastic bearing fit clearance are difficult, the present invention carries
For ball bearing under a kind of low temperature environment and the axial static friction testing device of elastic bearing, realize in low temperature ring
The stiction of ball bearing and elastic bearing is tested under border, the Rational choice for both gaps provides number
According to foundation.
To reach above-mentioned purpose, the technical solution used in the present invention is：
The axial static friction testing device of ball bearing and elastic bearing under a kind of low temperature environment, including assistor,
Displacement transducer, support frame, insulation cover, heat-preservation cylinder, T-shaped slide rail；Assistor is fixed on support frame, and two
Individual displacement transducer is fixed on support frame；Insulation cover includes cover heat-insulation layer, cover, U-shaped card slot and cylinder
Lid handle, U-shaped card slot and cover handle are welded on cover, and cover heat-insulation layer is bonded on cover；Heat-preservation cylinder
Including cylinder handle, cylinder heat-insulation layer, barrel, cylinder bottom and T-slot bearing, cylinder handle, barrel, cylinder bottom and T
Type groove bearing is welded as a whole, and barrel is provided with inverted L-type neck, and cylinder heat-insulation layer is bonded at barrel and cylinder bottom
On；T-shaped slide rail is welded with support frame, T-shaped slide rail coordinates realization to consolidate heat-preservation cylinder with T-slot bearing
It is fixed.
The device course of work is as follows：Heat-preservation cylinder is fixed on by the cooperation of T-slot bearing and T-shaped slide rail
On support frame；Bearing is fixed at aixs cylinder shoulder by tightening nut, then elastic bearing and bearing carried out
Assemble, on the hole that support bar is passed through to axle after assembling, and adjusting pad is placed in center in heat-preservation cylinder, most
Test object is hung on to the high point of inverted L-type neck in heat-preservation cylinder by support bar afterwards；Slowly toward insulation
Cryogenic liquid is poured into cylinder, after liquid is totally submerged tested elastic bearing and bearing, covers insulation cover,
U-shaped card slot is blocked support bar, stand a period of time, elastic bearing is down to bearing by normal temperature environment low
Warm environment；By cover handle rotary heat-insulating lid, so as to drive support bar to rotate to L-type by U-shaped card slot
Above neck low spot so that test object height reduction, now elastic bearing switch to paste by gap with adjusting pad
Conjunction state；Cushion block is added on axle, and is carried out using assistor or universal testing machine by cushion block above axle
Slow loading, monitor the relative displacement of cushion block；When the relative displacement of cushion block is undergone mutation, show elastic branch
Hold and relative slip occurs between bearing, now record test force value changes point of inflexion on a curve, obtain shafting and open
Originate the raw relative test force value slided；Decompose test object, measurement cushion block, support bar, axle, bearing and
Tighten the gross weight of nut；Then the low temperature of bearing and elastic bearing coordinates stiction by above-mentioned survey gross weight
The test force value sum of slip relative with above-mentioned generation.
Described assistor is bolted on support frame.
Two displacement transducers are fixed on support frame by hex nut.
Having the beneficial effect that acquired by the present invention：
The present invention is applied to cryogenic liquid rocket engine turbopump field, it can also be used to other rotating machinery necks
Domain, there is advantages below：
(1) test scope is wide, measurement accuracy is high.By injecting different cryogenic medias into heat-preservation cylinder body,
The test environment temperature of adjustable subject bearing and elastic bearing, can be surveyed in 20~288K temperature ranges
Examination；By the structure design of the heat-preservation cylinder base of reinforcement, apparatus of the present invention dynamometry scope is up to 0~10000N；
Axial force loads the accurate loading that axial force can be realized by assistor or universal testing machine, and precision is higher.
(2) versatility is good.The diameter of adjustment axle and the height of adjusting pad, diameter is only needed to meet difference
The axial static friction measurement demand of specification bearing and elastic bearing.
(3) security is preferable.The present invention measured piece and power transmission shifting axle substantially in the heat-preservation cylinder body of closing,
Cryogenic liquid in test process can be avoided to spill, T-slot bearing (17) and T-shaped slide rail (7) can be passed through
Device can be fixed on support frame by cooperation, avoid heat-preservation cylinder in test process from toppling over and cause Cryogenic burns thing
Therefore generation.
(4) it is simple to operate, there is certain convenience.It need to can only be controlled indirectly by rotary heat-insulating lid handle
The reduction of measurand height processed, simple and convenient, the loading of axial force can be controlled by computer
And display.
(5) simple in construction, cost is low.The present invention is simple in construction, requires relatively low to part processing precision, system
Cause cheap, can also be loaded, be realized to low temperature axial friction by existing omnipotent test machine
Measurement, high-precision test data is got with less input.
Brief description of the drawings
Fig. 1 is test device schematic diagram；
Fig. 2 is test device profile；
Fig. 3 is clamping tooling profile；
Fig. 4 is inversion L-type groove, U-shaped card slot and connecting structure for supporting rod figure；
In figure：1st, assistor；2nd, displacement transducer；3rd, support frame；4th, cushion block；5th, insulation cover；6、
Heat-preservation cylinder；7th, T-shaped slide rail；8th, cover heat-insulation layer；9th, cover；10th, U-shaped card slot；11st, cover handle
Hand；12nd, support bar；13rd, cylinder handle；14th, cylinder heat-insulation layer；15th, barrel；16th, cylinder bottom；17、T
Type groove bearing；18th, L-type neck；19th, axle；20th, elastic bearing；21st, bearing；22nd, nut is tightened；
23rd, adjusting pad.
Embodiment
The structure function of the present invention is described in detail below in conjunction with the accompanying drawings.
As shown in Fig. 1-4, the axial stiction of ball bearing and elastic bearing under low temperature environment of the present invention
Test device includes assistor 1, displacement transducer 2, support frame 3, insulation cover 5, heat-preservation cylinder 6, T-shaped cunning
Rail 7；
Assistor 1 is bolted on support frame 3, and the loading to test suite axial force can be achieved；
Two displacement transducers 2 are fixed on support frame 3 by hex nut, for monitoring the relative position of cushion block 4
Move；Insulation cover 5 includes cover heat-insulation layer 8, cover 9, U-shaped card slot 10 and cover handle 11, U-shaped card
Groove 10 and cover handle 11 are welded on cover 9, and cover heat-insulation layer 8 is adhesive on cover 9 by low temperature,
It is made up of the material of low thermal conductivity, can effectively completely cuts off the transmission of external heat, is prevented low in heat-preservation cylinder 6
Geothermal liquid is rapidly heated vaporization, avoids external heat source from influenceing the test effect of experiment；Heat-preservation cylinder 6 includes cylinder handle
Hand 13, cylinder heat-insulation layer 14, barrel 15, cylinder bottom 16 and T-slot bearing 17, cylinder handle 13, barrel 15,
Cylinder bottom 16 and T-slot bearing 17 are welded as a whole, and barrel 15 is provided with inverted L-type neck 18, use
In the height of adjustment measurand, cylinder heat-insulation layer 14 is adhesive on barrel 15 and cylinder bottom 16 by low temperature, its
Function is identical with cover heat-insulation layer 8；T-shaped slide rail 7 is welded with support frame 3, by with T-slot bearing
17 coordinate, and the fixation to heat-preservation cylinder 6 can be achieved, and prevent the rollover of heat-preservation cylinder 6 from causing Cryogenic burns accident；Survey
Examination component includes support bar 12, axle 19, elastic bearing 20, bearing 21, tightens nut 22 and adjusting pad 23.
The course of work of the present invention is as follows：
(1) heat-preservation cylinder 6 is fixed
Heat-preservation cylinder 6 is fixed on support frame 3 by the cooperation of T-slot bearing 17 and T-shaped slide rail 7；
(2) test suite is assembled
Bearing 21 is fixed at the crossette of axle 19 by tightening nut 22 first, then to elastic bearing 20
Assembled with bearing 21, on the hole that support bar 12 is passed through to axle 19 after assembling, and adjusting pad 23 is put
In center in heat-preservation cylinder 6, test object is hung in heat-preservation cylinder 6 finally by support bar 12 and is inverted
L-type neck 18 high point.
(3) low-temperature test environment is established
Slowly toward cryogenic liquid is poured into heat-preservation cylinder 6, liquid is set to be totally submerged tested elastic bearing 20 and axle
After holding 21, insulation cover 5 is covered, U-shaped card slot 10 is blocked support bar 12, a period of time is stood, makes bullet
Property supporting 20 with bearing 21 low temperature environment is down to by normal temperature environment.
(4) test object height is adjusted
By the rotary heat-insulating lid 5 of cover handle 11, so as to drive support bar 12 to rotate by U-shaped card slot 10
To above the low spot of L-type neck 18 so that test object height reduction, now elastic bearing 20 and adjusting pad
23 switch to fit-state by gap；
(5) test object is loaded
Cushion block 4 is added on axle 19, and uses assistor 1 or universal testing machine by cushion block 4 on axle 19
Fang Jinhang Slow loadings, monitor the relative displacement of cushion block 4.When the relative displacement of cushion block 4 is undergone mutation,
Show that relative slip occurs between elastic bearing 20 and bearing 21, now record test force value changes curve
Flex point, obtain the universal testing machine test force value that relative slip takes place in shafting.
(6) calculating of stiction is carried out
Test object is decomposed, cushion block 4, support bar 12, axle 19, bearing 21 is measured and tightens nut 22
Gross weight；Then the low temperature of bearing 21 and elastic bearing 20 coordinate stiction for it is above-mentioned survey gross weight with it is upper
State and the relative test force value sum slided occurs.
Claims (4)
1. the axial static friction testing device of ball bearing and elastic bearing under a kind of low temperature environment, its feature exist
In：Including assistor (1), displacement transducer (2), support frame (3), insulation cover (5), insulation
Cylinder (6), T-shaped slide rail (7)；Assistor (1) is fixed on support frame (3), two displacement transducers
(2) it is fixed on support frame (3)；Insulation cover (5) include cover heat-insulation layer (8), cover (9),
U-shaped card slot (10) and cover handle (11), U-shaped card slot (10) and cover handle (11) are welded on
On cover (9), cover heat-insulation layer (8) is bonded on cover (9)；Heat-preservation cylinder (6) include cylinder handle (13),
Cylinder heat-insulation layer (14), barrel (15), cylinder bottom (16) and T-slot bearing (17), cylinder handle (13),
Barrel (15), cylinder bottom (16) and T-slot bearing (17) are welded as a whole, and barrel (15) is provided with
Inverted L-type neck (18), cylinder heat-insulation layer (14) are bonded on barrel (15) and cylinder bottom (16)；Branch
T-shaped slide rail (7) is welded with support (3), T-shaped slide rail (7) coordinates real with T-slot bearing (17)
Now to the fixation of heat-preservation cylinder (6).
2. the axial stiction of ball bearing and elastic bearing is surveyed under low temperature environment according to claim 1
Trial assembly is put, it is characterised in that：The device course of work is as follows：Pass through T-slot bearing (17) and T-shaped cunning
Heat-preservation cylinder (6) is fixed on support frame (3) by the cooperation of rail (7)；By tightening nut (22) by axle
Hold (21) to be fixed at axle (19) crossette, luggage then is entered to elastic bearing (20) and bearing (21)
Match somebody with somebody, on the hole that support bar (12) is passed through to axle (19) after assembling, and adjusting pad (23) is placed in insulation
Cylinder (6) interior center, test object is hung in heat-preservation cylinder (6) finally by support bar (12)
The high point of inverted L-type neck (18)；Cryogenic liquid slowly is poured into toward heat-preservation cylinder (6) is interior, makes liquid complete
The tested elastic bearing (20) of full submergence is with after bearing (21), covering insulation cover (5), making U-shaped card slot
(10) block support bar (12), stand a period of time, make elastic bearing (20) and bearing (21) by
Normal temperature environment is down to low temperature environment；By cover handle (11) rotary heat-insulating lid (5), so as to by U-shaped
Neck (10) is driven above support bar (12) rotation to L-type neck (18) low spot so that test object
Height reduction, now elastic bearing (20) and adjusting pad (23) switch to fit-state by gap；In axle (19)
Upper addition cushion block (4), and use assistor (1) or universal testing machine by cushion block (4) to axle (19)
Top carries out Slow loading, the relative displacement of monitoring cushion block (4)；When the relative displacement of cushion block (4) occurs
During mutation, show that relative slip occurs between elastic bearing (20) and bearing (21), now record test
The flex point of force value change curve, obtain the test force value that relative slip takes place in shafting；Decompose test object,
Measure cushion block (4), support bar (12), axle (19), bearing (21) and tighten the total of nut (22)
Weight；Then the low temperature of bearing (21) and elastic bearing (20) coordinates stiction by above-mentioned survey gross weight
The test force value sum of slip relative with above-mentioned generation.
3. the axial stiction of ball bearing and elastic bearing is surveyed under low temperature environment according to claim 1
Trial assembly is put, it is characterised in that：Described assistor (1) is bolted on support frame (3).
4. the axial stiction of ball bearing and elastic bearing is surveyed under low temperature environment according to claim 1
Trial assembly is put, it is characterised in that：Two displacement transducers (2) are fixed on support frame (3) by hex nut
On.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610320178.3A CN107367387B (en) | 2016-05-13 | 2016-05-13 | Axial static friction force testing device for ball bearing and elastic support in low-temperature environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610320178.3A CN107367387B (en) | 2016-05-13 | 2016-05-13 | Axial static friction force testing device for ball bearing and elastic support in low-temperature environment |
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| Publication Number | Publication Date |
|---|---|
| CN107367387A true CN107367387A (en) | 2017-11-21 |
| CN107367387B CN107367387B (en) | 2023-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610320178.3A Active CN107367387B (en) | 2016-05-13 | 2016-05-13 | Axial static friction force testing device for ball bearing and elastic support in low-temperature environment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110160867A (en) * | 2018-03-20 | 2019-08-23 | 龙游县万基建设工程检测有限公司 | A kind of liquid crystal display universal testing machine of high-speeding operation and safety precise |
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| CN104568443A (en) * | 2015-01-27 | 2015-04-29 | 四川大学 | Space rolling bearing comprehensive performance experiment device |
| CN105527221A (en) * | 2015-12-10 | 2016-04-27 | 江南大学 | Frictional force simulation generator |
| CN205748913U (en) * | 2016-05-13 | 2016-11-30 | 北京航天动力研究所 | Ball bearing and flexibly mounted axial static friction testing device under low temperature environment |
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2016
- 2016-05-13 CN CN201610320178.3A patent/CN107367387B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06308006A (en) * | 1993-04-26 | 1994-11-04 | Riken Corp | Friction and abrasion tester |
| CN201034897Y (en) * | 2007-05-24 | 2008-03-12 | 张国珍 | Vacuum low-temperature frictional wear tester |
| CN102175369A (en) * | 2011-02-24 | 2011-09-07 | 上海大学 | Friction torque testing device for rolling bearing at low temperature |
| CN102162910A (en) * | 2011-04-19 | 2011-08-24 | 中国科学院国家天文台南京天文光学技术研究所 | Permanent magnetic suspension support shafting structure suitable for Antarctic astronomical telescope |
| CN103048136A (en) * | 2012-12-19 | 2013-04-17 | 燕山大学 | High and low temperature environment service life testing machine for joint bearing |
| CN103630319A (en) * | 2013-10-24 | 2014-03-12 | 浙江大学 | Impact test table based on axial loading of wind power high-speed shaft bearing |
| CN104236907A (en) * | 2014-09-04 | 2014-12-24 | 西安交通大学 | Rolling bearing friction moment and stiffness measuring device and method |
| CN104568443A (en) * | 2015-01-27 | 2015-04-29 | 四川大学 | Space rolling bearing comprehensive performance experiment device |
| CN105527221A (en) * | 2015-12-10 | 2016-04-27 | 江南大学 | Frictional force simulation generator |
| CN205748913U (en) * | 2016-05-13 | 2016-11-30 | 北京航天动力研究所 | Ball bearing and flexibly mounted axial static friction testing device under low temperature environment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110160867A (en) * | 2018-03-20 | 2019-08-23 | 龙游县万基建设工程检测有限公司 | A kind of liquid crystal display universal testing machine of high-speeding operation and safety precise |
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| Publication number | Publication date |
|---|---|
| CN107367387B (en) | 2023-08-22 |
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