CN205748913U - Ball bearing and flexibly mounted axial static friction testing device under low temperature environment - Google Patents
Ball bearing and flexibly mounted axial static friction testing device under low temperature environment Download PDFInfo
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- CN205748913U CN205748913U CN201620438150.5U CN201620438150U CN205748913U CN 205748913 U CN205748913 U CN 205748913U CN 201620438150 U CN201620438150 U CN 201620438150U CN 205748913 U CN205748913 U CN 205748913U
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Abstract
This utility model relates to ball bearing and flexibly mounted axial static friction testing device under a kind of low temperature environment, it is adaptable to cryogenic liquid rocket engine turbopump field is it can also be used to other low-temperature rotary mechanical field.Assistor is fixed on bracing frame, and two displacement transducers are fixed on bracing frame；Insulation cover includes that cover heat-insulation layer, cover, U-shaped draw-in groove and cover handle, U-shaped draw-in groove and cover handle are welded on cover, and cover heat-insulation layer is bonded on cover；Heat-preservation cylinder includes at the bottom of a handle, cylinder heat-insulation layer, barrel, cylinder and T-slot bearing, is welded as a whole with T-slot bearing at the bottom of cylinder handle, barrel, cylinder, and barrel is provided with inverted L-type draw-in groove, and cylinder heat-insulation layer is bonded at the bottom of barrel and cylinder；Being welded with T-shaped slide rail on bracing frame, T-shaped slide rail coordinates realization to fix heat-preservation cylinder with T-slot bearing.This utility model may be implemented in and tests ball bearing with flexibly mounted stiction under low temperature environment, and the Rational choice for both gaps provides data foundation.
Description
Technical field
This utility model relates to ball bearing under a kind of low temperature environment and fills with flexibly mounted axial static friction testing
Put, it is adaptable to cryogenic liquid rocket engine turbopump field is it can also be used to other low-temperature rotary mechanical field.
Background technology
Bearing and elastic bearing are the support key component of 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 the reliably working of bearing to closing weight
Want, especially for high-power cryogenic liquid rocket engine turbopump.In this type of turbine pump, during work
Bearing outside collar should be made as far as possible not produce relative sliding friction with elastic bearing circumferential direction, to avoid friction
Overheated and cause cooling medium vaporization or the generation large change of bearing guide clearance.Simultaneously as it is high-power
Turbine pump axial force is bigger, it is necessary to uses axial force balance system, requires that rotor-support-foundation system exists during the work of this system
Axial direction can move freely, and not so causes the destruction of bearing by causing bearing to bear larger axial force, this
Also imply that the axial friction between bearing and elastic bearing again can not be excessive.Therefore, bearing is with elastic
The fit clearance Rational choice of supporting is the most extremely difficult.
For cryogenic liquid rocket engine turbopump, carry out at normal temperatures for the ease of bearing and elastic bearing
Assembly and disassembly, the most generally selects matched in clearance, and elastic bearing selects 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, the most non-at the design initial stage
Often it is necessary both the axial static frictional force under working environment is measured.Current existing bearing measuring
Device concentrates on to bearing overall performance and the measurement of circumference static friction torque under room temperature or low temperature environment, the most scarce
Weary low temperature environment lower bearing and flexibly mounted axial static friction testing device.
Summary of the invention
The problem choosing difficulty in order to solve cryogenic engine bearing and elastic bearing fit clearance, this practicality is new
Type provides ball bearing and flexibly mounted axial static friction testing device under a kind of low temperature environment, it is achieved low
Testing ball bearing with flexibly mounted stiction under temperature environment, the Rational choice for both gaps carries
For data foundation.
For reaching above-mentioned purpose, technical solution adopted in the utility model is:
Ball bearing and flexibly mounted axial static friction testing device under a kind of low temperature environment, including assistor,
Displacement transducer, bracing frame, insulation cover, heat-preservation cylinder, T-shaped slide rail；Assistor is fixed on bracing frame, and two
Individual displacement transducer is fixed on bracing frame；Insulation cover includes cover heat-insulation layer, cover, U-shaped draw-in groove and cylinder
Lid handle, U-shaped draw-in groove and cover handle are welded on cover, and cover heat-insulation layer is bonded on cover；Heat-preservation cylinder
Including at the bottom of a handle, cylinder heat-insulation layer, barrel, cylinder and T-slot bearing, at the bottom of cylinder handle, barrel, cylinder and T
Type groove bearing is welded as a whole, and barrel is provided with inverted L-type draw-in groove, and cylinder heat-insulation layer is bonded at the bottom of barrel and cylinder
On；Being welded with T-shaped slide rail on bracing frame, T-shaped slide rail coordinates realization to consolidate heat-preservation cylinder with T-slot bearing
Fixed.
This device work process is as follows: be fixed on by heat-preservation cylinder with coordinating of T-shaped slide rail by T-slot bearing
On bracing frame；By fastening nut, bearing is fixed at aixs cylinder shoulder, then elastic bearing is carried out with bearing
Assembling, passes support bar after assembling on the hole of axle, and adjusting pad is placed in center in heat-preservation cylinder,
The high point of inverted L-type draw-in groove in test object being hung on heat-preservation cylinder by support bar afterwards；Slowly toward insulation
Pour cryogenic liquid in Tong into, after making liquid be totally submerged tested elastic bearing and bearing, cover insulation cover,
Make U-shaped draw-in groove block support bar, stand a period of time, make elastic bearing be down to by normal temperature environment low with bearing
Temperature environment；By cover handle rotary heat-insulating lid, thus support bar is driven to rotate to L-type by U-shaped draw-in groove
Above draw-in groove low spot so that test object height reduces, and now elastic bearing and adjusting pad are transferred to patch by gap
Conjunction state；Axle adds cushion block, and uses assistor or universal testing machine to be carried out by the countershaft top of cushion block
Slow loading, the relative displacement of monitoring cushion block；When the relative displacement of cushion block is undergone mutation, show elastic
Hold and relative slip occurs between bearing, the flex point of now record test force value change curve, obtain axle system and open
Originate the raw test force value relatively slided；Decompose test object, measure cushion block, support bar, axle, bearing and
The gross weight of fastening nut；Then bearing coordinates stiction to be surveyed gross weight by above-mentioned with flexibly mounted low temperature
The test force value sum slided relative with above-mentioned generation.
Described assistor is bolted on bracing frame.
Two displacement transducers are fixed on bracing frame by hex nut.
Having the beneficial effect that acquired by this utility model
This utility model is applicable to cryogenic liquid rocket engine turbopump field it can also be used to other whirler
Tool field, has the advantage that
(1) scope is wide, certainty of measurement is high in test.By injecting different cryogenic medias in heat-preservation cylinder body,
The tested bearing of scalable and flexibly mounted test environment temperature, can survey in 20～288K temperature ranges
Examination；By strengthen heat-preservation cylinder base structure design, this utility model device dynamometry scope up to 0～
10000N；Axial force loads the accurate loading that can be realized axial force by assistor or universal testing machine, essence
Spend higher.
(2) versatility is good.Have only to adjust the diameter of axle and the height of adjusting pad, diameter just can meet difference
Specification bearing and flexibly mounted axial static friction measurement demand.
(3) safety is preferable.Measured piece of the present utility model and power transmission shifting axle are substantially at the heat-preservation cylinder closed
Internal, cryogenic liquid in test process can be avoided to spill, can be by T-slot bearing (17) and T-shaped slide rail
(7) device can be fixed on bracing frame by cooperation, it is to avoid in test process, heat-preservation cylinder is toppled over and caused low temperature
The generation of cold injury accident.
(4) simple to operate, there is certain convenience.Only just can indirectly need to be controlled 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, low cost.This utility model simple in construction, requires relatively low to part processing precision,
Cheap for manufacturing cost, it is possible to load by existing omnipotent test machine, it is achieved to low temperature axial friction
Measurement, get high-precision test data with less input.
Accompanying drawing explanation
Fig. 1 is test device schematic diagram；
Fig. 2 is test device profile；
Fig. 3 is clamping tooling profile；
Fig. 4 is for being inverted L-type groove, U-shaped draw-in groove and connecting structure for supporting rod figure；
In figure: 1, assistor；2, displacement transducer；3, bracing frame；4, cushion block；5, insulation cover；6、
Heat-preservation cylinder；7, T-shaped slide rail；8, cover heat-insulation layer；9, cover；10, U-shaped draw-in groove；11, cover handle
Hands；12, support bar；13, cylinder handle；14, cylinder heat-insulation layer；15, barrel；16, at the bottom of cylinder；17、T
Type groove bearing；18, L-type draw-in groove；19, axle；20, elastic bearing；21, bearing；22, fastening nut；
23, adjusting pad.
Detailed description of the invention
Below in conjunction with the accompanying drawings structure function of the present utility model is described in detail.
As shown in Fig. 14, under low temperature environment described in the utility model, ball bearing rubs with flexibly mounted axial static
Wipe force test device and include assistor 1, displacement transducer 2, bracing frame 3, insulation cover 5, heat-preservation cylinder 6, T
Type slide rail 7；
Assistor 1 is bolted on bracing frame 3, can realize the loading to test suite axial force；
Two displacement transducers 2 are fixed on bracing frame 3 by hex nut, for monitoring the phase para-position of cushion block 4
Move；Insulation cover 5 includes cover heat-insulation layer 8, cover 9, U-shaped draw-in groove 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 bonded on cover 9 by low temperature glue,
It is made up of the material of low thermal conductivity, can effectively completely cut off the transmission of external heat, low in preventing heat-preservation cylinder 6
Geothermal liquid is rapidly heated vaporization, it is to avoid the test effect of external heat source impact test；Heat-preservation cylinder 6 includes a handle
At the bottom of hands 13, cylinder heat-insulation layer 14, barrel 15, cylinder 16 and T-slot bearing 17, cylinder handle 13, barrel 15,
The cylinder end 16 and T-slot bearing 17 are welded as a whole, and barrel 15 is provided with inverted L-type draw-in groove 18, use
In adjusting the height of measurand, cylinder heat-insulation layer 14 is bonded at the bottom of barrel 15 and cylinder on 16 by low temperature glue, its
Function is identical with cover heat-insulation layer 8；Be welded with T-shaped slide rail 7 on bracing frame 3, by with T-slot bearing
17 coordinate, and can realize fixing heat-preservation cylinder 6, prevent heat-preservation cylinder 6 rollover from causing Cryogenic burns accident；Survey
Examination assembly includes support bar 12, axle 19, elastic bearing 20, bearing 21, fastening nut 22 and adjusting pad 23.
Work process of the present utility model is as follows:
(1) heat-preservation cylinder 6 is fixed
Heat-preservation cylinder 6 is fixed on bracing frame 3 with coordinating of T-shaped slide rail 7 by T-slot bearing 17；
(2) test suite is assembled
First pass through fastening nut 22 to be fixed on by bearing 21 at axle 19 crossette, then to elastic bearing 20
Assemble with bearing 21, after assembling, support bar 12 is passed on the hole of axle 19, and adjusting pad 23 is put
Center in heat-preservation cylinder 6, is inverted in test object hanging on heat-preservation cylinder 6 finally by support bar 12
The high point of L-type draw-in groove 18.
(3) low-temperature test environment is set up
Slowly in heat-preservation cylinder 6, pour cryogenic liquid into, make liquid be totally submerged tested elastic bearing 20 and axle
After holding 21, cover insulation cover 5, make U-shaped draw-in groove 10 block support bar 12, stand a period of time, make bullet
Property supporting 20 with bearing 21 be down to low temperature environment by normal temperature environment.
(4) test object height is adjusted
By cover handle 11 rotary heat-insulating lid 5, thus support bar 12 is driven to rotate by U-shaped draw-in groove 10
Above L-type draw-in groove 18 low spot so that test object height reduces, now elastic bearing 20 and adjusting pad
23 are transferred to fit-state by gap；
(5) test object is loaded
Axle 19 adds cushion block 4, and uses assistor 1 or universal testing machine by cushion block 4 countershaft 19
Fang Jinhang Slow loading, the relative displacement of monitoring cushion block 4.When the relative displacement of cushion block 4 is undergone mutation,
Show between elastic bearing 20 with bearing 21, relative slip, now record test force value change curve
Flex point, obtains the universal testing machine test force value that axle system starts to occur relatively to slide.
(6) calculating of stiction is carried out
Decompose test object, measure cushion block 4, support bar 12, axle 19, bearing 21 and fastening nut 22
Gross weight；Then bearing 21 coordinates stiction by above-mentioned gross weight of being surveyed with upper with the low temperature of elastic bearing 20
State the test force value sum occurring relatively to slide.
Claims (4)
1. ball bearing and a flexibly mounted axial static friction testing device under low temperature environment, its feature exists
In: include assistor (1), displacement transducer (2), bracing frame (3), insulation cover (5), insulation
Cylinder (6), T-shaped slide rail (7)；Assistor (1) is fixed on bracing frame (3), two displacement transducers
(2) it is fixed on bracing frame (3)；Insulation cover (5) include cover heat-insulation layer (8), cover (9),
U-shaped draw-in groove (10) and cover handle (11), U-shaped draw-in groove (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 a handle (13),
(16) and T-slot bearing (17) at the bottom of cylinder heat-insulation layer (14), barrel (15), cylinder, cylinder handle (13),
(16) at the bottom of barrel (15), cylinder and T-slot bearing (17) are welded as a whole, and barrel (15) is provided with
Inverted L-type draw-in groove (18), cylinder heat-insulation layer (14) is bonded on (16) at the bottom of barrel (15) and cylinder；?
Being welded with T-shaped slide rail (7) on support (3), T-shaped slide rail (7) coordinates real with T-slot bearing (17)
Now heat-preservation cylinder (6) is fixed.
Under low temperature environment the most according to claim 1, ball bearing is surveyed with flexibly mounted axial static frictional force
Electricity testing device, it is characterised in that: this device work process is as follows: by T-slot bearing (17) and T-shaped cunning
Heat-preservation cylinder (6) is fixed on bracing frame (3) by the cooperation of rail (7)；By fastening nut (22) by axle
Hold (21) and be fixed at axle (19) crossette, then elastic bearing (20) is filled with bearing (21)
Join, after assembling, support bar (12) is passed on the hole of axle (19), and adjusting pad (23) is placed in insulation
Cylinder (6) interior center, hangs on test object in heat-preservation cylinder (6) finally by support bar (12)
The high point of inverted L-type draw-in groove (18)；Slowly in heat-preservation cylinder (6), pour cryogenic liquid into, make liquid complete
After the tested elastic bearing (20) of full submergence and bearing (21), cover insulation cover (5), make U-shaped draw-in groove
(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), thus by U-shaped
Draw-in groove (10) drives support bar (12) to rotate above L-type draw-in groove (18) low spot so that test object
Height reduction, now elastic bearing (20) and adjusting pad (23) are transferred to fit-state by gap；In axle (19)
Upper interpolation cushion block (4), and use assistor (1) or universal testing machine by cushion block (4) countershaft (19)
Top carries out Slow loading, the relative displacement of monitoring cushion block (4)；When the relative displacement of cushion block (4) occurs
During sudden change, show between elastic bearing (20) with bearing (21), relative slip, now record test
The flex point of force value change curve, obtains the test force value that axle system starts to occur relatively to slide；Decompose test object,
Measure the total of cushion block (4), support bar (12), axle (19), bearing (21) and fastening nut (22)
Weight；Then bearing (21) coordinates stiction to be surveyed gross weight by above-mentioned with the low temperature of elastic bearing (20)
The test force value sum slided relative with above-mentioned generation.
Under low temperature environment the most according to claim 1, ball bearing is surveyed with flexibly mounted axial static frictional force
Electricity testing device, it is characterised in that: described assistor (1) is bolted on bracing frame (3).
Under low temperature environment the most according to claim 1, ball bearing is surveyed with flexibly mounted axial static frictional force
Electricity testing device, it is characterised in that: two displacement transducers (2) are fixed on bracing frame (3) by hex nut
On.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620438150.5U CN205748913U (en) | 2016-05-13 | 2016-05-13 | Ball bearing and flexibly mounted axial static friction testing device under low temperature environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620438150.5U CN205748913U (en) | 2016-05-13 | 2016-05-13 | Ball bearing and flexibly mounted axial static friction testing device under low temperature environment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205748913U true CN205748913U (en) | 2016-11-30 |
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ID=57366227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620438150.5U Active CN205748913U (en) | 2016-05-13 | 2016-05-13 | Ball bearing and flexibly mounted axial static friction testing device under low temperature environment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205748913U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107367387A (en) * | 2016-05-13 | 2017-11-21 | 北京航天动力研究所 | The axial static friction testing device of ball bearing and elastic bearing under low temperature environment |
| CN110160860A (en) * | 2018-04-11 | 2019-08-23 | 龙游县万基建设工程检测有限公司 | A kind of agravic universal testing machine based on polished rod calibration guiding |
-
2016
- 2016-05-13 CN CN201620438150.5U patent/CN205748913U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107367387A (en) * | 2016-05-13 | 2017-11-21 | 北京航天动力研究所 | The axial static friction testing device of ball bearing and elastic bearing under low temperature environment |
| CN107367387B (en) * | 2016-05-13 | 2023-08-22 | 北京航天动力研究所 | Axial static friction force testing device for ball bearing and elastic support in low-temperature environment |
| CN110160860A (en) * | 2018-04-11 | 2019-08-23 | 龙游县万基建设工程检测有限公司 | A kind of agravic universal testing machine based on polished rod calibration guiding |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |