CN106482949A - Angular contact ball bearing radial direction Static stiffness measurement apparatus - Google Patents
Angular contact ball bearing radial direction Static stiffness measurement apparatus Download PDFInfo
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- CN106482949A CN106482949A CN201510524818.8A CN201510524818A CN106482949A CN 106482949 A CN106482949 A CN 106482949A CN 201510524818 A CN201510524818 A CN 201510524818A CN 106482949 A CN106482949 A CN 106482949A
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- reducing sleeve
- radial direction
- support
- angular contact
- static stiffness
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Abstract
The invention belongs to Liquid Propellant Rocket Engine field, and in particular to a kind of angular contact ball bearing radial direction Static stiffness measurement apparatus.Support is vertically fixed on pedestal, and reducing sleeve is connected with support；Between adjusting pad I, the bearing in left side, block plate I, the disc spring in left side, disc spring isolating pad, the disc spring on right side, block plate II, bearing, adjusting pad, the bearing on right side, adjusting pad II are sequentially enclosed within forcing shaft, tighten nut to be screwed on forcing shaft, imposed load is required according to screw-down torque, afterwards the component is passed through reducing sleeve, two bearings are distributed on right position in the middle of reducing sleeve；Two hydraulic amplifier devices are symmetrically disposed at forcing shaft both sides and are fixed on pedestal, and near support；Pressing plate is fixed on reducing sleeve, and two current vortex sensors are arranged on pressing plate two ends.The present invention can be used to measure biserial level pressure pretension angular contact bearing radial direction Static stiffness, have certain versatility, accuracy and convenience in liquid-propellant rocket engine field.
Description
Technical field
The invention belongs to Liquid Propellant Rocket Engine field, and in particular to a kind of angular contact ball bearing is radially quiet
Stiffness measurement device.
Background technology
When liquid-propellant rocket engine working rotor rotating speed n is less than 0.7Ncr1 (first critical speed), rotor claims
For rigid rotator.For rigid rotator, first critical speed depends primarily on rotor bearing rigidity, namely
The size of angular contact ball bearing radial direction Static stiffness.
According to radial direction Static stiffness empirical formula, its value is typically not less than 1 × 108N/m.But as ball is tied
The difference that the difference, the difference of bearing machining manufacturing process of structure tissue and heat treatment, assembling coordinate, bearing reality
Border Static stiffness value is often less than normal compared with calculated value, and supporting is on the weak side will to cause first critical speed to reduce, and even result in
Working speed is overlapped with which, produces resonance failure, affects normal working of engine.
Therefore in the rigid rotator supporting system design phase, need to be accurate to bearing radial rigidity by test method
Measurement, to meet the requirement of rotor dynamics.
Content of the invention
It is an object of the invention to provide a kind of angular contact ball bearing radial direction Static stiffness measurement apparatus, with measurement angle
Contact ball bearing radial direction Static stiffness, is that the design of liquid-propellant rocket engine rigid rotator supporting system provides foundation.
For reaching above-mentioned purpose, the technical solution used in the present invention is：
A kind of angular contact ball bearing radial direction Static stiffness measurement apparatus, including pedestal, support, two hydraulic amplifiers
Adjusting pad, disc spring isolating pad, block plate II, two dish between device, reducing sleeve, adjusting pad I, block plate I, bearing
Spring, adjusting pad II, tighten nut, forcing shaft, pressing plate, two current vortex sensors；Described test object
For：Two bearings；Support is vertically fixed on pedestal, and reducing sleeve is connected with support；Adjusting pad I, left side
Adjusting pad between bearing, block plate I, the disc spring in left side, disc spring isolating pad, the disc spring on right side, block plate II, bearing,
The bearing on right side, adjusting pad II are sequentially enclosed within forcing shaft, are tightened nut and are screwed on forcing shaft, according to tightening
The component is passed through reducing sleeve by torque requirement imposed load afterwards, and two bearings are distributed on left in the middle of reducing sleeve
Right position；Two hydraulic amplifier devices are symmetrically disposed at forcing shaft both sides and are fixed on pedestal, and near support；
Pressing plate is fixed on reducing sleeve, and two current vortex sensors are arranged on pressing plate two ends.
Described support is vertically fixed on pedestal by four stay bolts.
Described reducing sleeve is fastened by 12 one circles of bolt and nut I circumference with support.
Two described hydraulic amplifier devices are fixed on pedestal by eight bolt and nut II.
Described pressing plate is bolted on reducing sleeve.
Having the beneficial effect that acquired by the present invention：
The present invention can be used to measure biserial level pressure pretension angular contact bearing radial direction Static stiffness, start in liquid rocket
Machine field has certain versatility, accuracy and convenience.
(1) thickness for only needing to adjust disc spring isolating pad can achieve the paired angular contact under axially different preloading
Ball bearing radial direction Static stiffness is measured；By changing external diameter, the internal diameter of reducing sleeve and the corresponding adjusting pad of forcing shaft
Internal-and external diameter, you can realize the measurement request of different bearing radial direction Static stiffness；With certain versatility；
(2) radial load by hydraulic amplifier device to axle applying straight up, is surveyed by current vortex sensor
Amount displacement, often increases or reduces 500N or 1000N load record corresponding height value, by power divided by position
Move variable quantity and rigidity value is obtained, multiple results are averaged i.e. mean rigidity value is obtained, increased rigidity survey
The accuracy of amount result；
(3) simple to operate, with certain convenience.
Description of the drawings
Fig. 1 is angular contact ball bearing radial direction Static stiffness measurement apparatus structure chart of the present invention；
In figure：1st, pedestal；2nd, support；3rd, hydraulic amplifier device；4th, reducing sleeve；5th, adjusting pad I；6、
Bearing；7th, block plate I；8th, adjusting pad between bearing；9th, disc spring isolating pad；10th, block plate II；11st, disc spring；
12nd, adjusting pad II；13rd, nut is tightened；14th, forcing shaft；15th, bolt and nut I；16th, bolt；17、
Pressing plate；18th, current vortex sensor；19th, bolt and nut II.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, angular contact ball bearing radial direction Static stiffness measurement apparatus of the present invention include pedestal 1,
Adjusting pad 8 between support 2, two hydraulic amplifier devices 3, reducing sleeve 4, adjusting pad I5, block plate I7, bearings,
Disc spring isolating pad 9, block plate II10, two disc springs 11, adjusting pad II12, tighten nut 13, forcing shaft 14,
12 bolt and nut I15, bolt 16, the bolt and nuts of current vortex sensor 18, eight of pressing plate 17, two
II19；Described test object is：Two bearings 6.
Support 2 is vertically fixed on pedestal 1 by four stay bolts, and reducing sleeve 4 passes through 12 with support 2
Individual one circle of bolt and nut I15 circumference is fastened；Adjusting pad I5, the bearing 6 in left side, block plate I7, the disc spring in left side
11st, the bearing 6 of adjusting pad 8, right side between the disc spring 11 of disc spring isolating pad 9, right side, block plate II10, bearing,
Adjusting pad II12 is sequentially enclosed within forcing shaft 14, is tightened nut 13 and is screwed on forcing shaft 14, according to screwing force
Square requires imposed load, afterwards the component is passed through reducing sleeve 4, so that two bearings 6 is distributed in reducing sleeve 4
Between right position；Two hydraulic amplifier devices 3 are symmetrically disposed at 14 both sides of forcing shaft, and as close to support
2, then be fixed on pedestal 1 by eight bolt and nut II 19.Pressing plate 17 is fixed on switching by bolt 16
On set 4, two current vortex sensors 18 are arranged on 17 two ends of pressing plate, adjust two current vortex sensors 18,
Which is made to be operated in the effective range of requirement with 4 distance of reducing sleeve；
3 position of adjustment hydraulic amplifier device so as in the horizontal direction as close to reducing sleeve 4, reduces reinforcing and misses
Difference；Adjustment current vortex sensor 18 and the distance on 14 surface of forcing shaft, are operated in current vortex sensor 18
In the range of linearity of requirement, reduce displacement measurement errors；
Forcing shaft 14 is preloaded, loaded load determines regarding bearing specification, forcing shaft during eliminating installation
14th, the installation gap of bearing 6, reducing sleeve 4, support 2；
Radial load is applied to forcing shaft 14, corresponding shift value is recorded every 500N or 1000N, by power
Rigidity value is obtained divided by corresponding displacement variable, loading and unloading force value and shift value are measured respectively, repeatedly
Average after calculating, you can obtain the rigidity value of the bearing 6.
Claims (5)
1. a kind of angular contact ball bearing radial direction Static stiffness measurement apparatus, it is characterised in that：Including pedestal (1),
Support (2), two hydraulic amplifier devices (3), reducing sleeve (4), adjusting pad I (5), block plate I (7),
Adjusting pad (8), disc spring isolating pad (9), block plate II (10), two disc springs (11), adjustment between bearing
Pad II (12), tighten nut (13), forcing shaft (14), pressing plate (17), two current vortex sensors
(18)；Described test object is：Two bearings (6)；Support (2) is vertically fixed on pedestal (1)
On, reducing sleeve (4) is connected with support (2)；Adjusting pad I (5), the bearing (6) in left side, block plate I
(7), the disc spring (11) in left side, disc spring isolating pad (9), the disc spring (11) on right side, block plate II (10),
Between bearing, adjusting pad (8), the bearing (6) on right side, adjusting pad II (12) are sequentially enclosed within forcing shaft (14)
On, tighten nut (13) and be screwed on forcing shaft (14), imposed load is required according to screw-down torque, afterwards
The component is passed through reducing sleeve (4), two bearings (6) are distributed on right position in the middle of reducing sleeve (4)；
Two hydraulic amplifier devices (3) are symmetrically disposed at forcing shaft (14) both sides and are fixed on pedestal (1), and lean on
Nearly support (2)；Pressing plate (17) is fixed on reducing sleeve (4), two current vortex sensor (18) peaces
It is mounted in pressing plate (17) two ends.
2. angular contact ball bearing radial direction Static stiffness measurement apparatus according to claim 1, it is characterised in that：
Described support (2) is vertically fixed on pedestal (1) by four stay bolts.
3. angular contact ball bearing radial direction Static stiffness measurement apparatus according to claim 1, it is characterised in that：
Described reducing sleeve (4) is fastened by 12 one circles of bolt and nut I (15) circumference with support (2).
4. angular contact ball bearing radial direction Static stiffness measurement apparatus according to claim 1, it is characterised in that：
Two described hydraulic amplifier devices (3) are fixed on pedestal (1) by eight bolt and nut II (19).
5. angular contact ball bearing radial direction Static stiffness measurement apparatus according to claim 1, it is characterised in that：
Described pressing plate (17) is fixed on reducing sleeve (4) by bolt (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510524818.8A CN106482949A (en) | 2015-08-25 | 2015-08-25 | Angular contact ball bearing radial direction Static stiffness measurement apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510524818.8A CN106482949A (en) | 2015-08-25 | 2015-08-25 | Angular contact ball bearing radial direction Static stiffness measurement apparatus |
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| CN106482949A true CN106482949A (en) | 2017-03-08 |
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| CN201510524818.8A Pending CN106482949A (en) | 2015-08-25 | 2015-08-25 | Angular contact ball bearing radial direction Static stiffness measurement apparatus |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107843432A (en) * | 2017-11-30 | 2018-03-27 | 北京航天动力研究所 | A kind of bearing dynamic stiffness measurement apparatus |
| CN108386188A (en) * | 2018-04-13 | 2018-08-10 | 国家海洋局第海洋研究所 | A kind of underwater robot can portable horizontal direction geological sampling drilling tool |
| CN109612658A (en) * | 2018-12-24 | 2019-04-12 | 人本集团有限公司 | Detect the device of semi-rigid bearing rigidity |
| CN110132510A (en) * | 2019-05-20 | 2019-08-16 | 天津飞旋科技有限公司 | A kind of radial magnetic bearing stiffness measurement device |
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| KR20070041194A (en) * | 2005-10-14 | 2007-04-18 | 삼성전자주식회사 | Static stiffness test apparatus for air bearing |
| CN101865772A (en) * | 2010-06-03 | 2010-10-20 | 西安交通大学 | Test device for testing performance of compliant foil gas journal bearing |
| CN101893512A (en) * | 2010-07-05 | 2010-11-24 | 西安理工大学 | Modularized static stiffness testing device for angular contact ball bearings |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107843432A (en) * | 2017-11-30 | 2018-03-27 | 北京航天动力研究所 | A kind of bearing dynamic stiffness measurement apparatus |
| CN107843432B (en) * | 2017-11-30 | 2024-02-09 | 北京航天动力研究所 | Dynamic stiffness measuring device for bearing |
| CN108386188A (en) * | 2018-04-13 | 2018-08-10 | 国家海洋局第海洋研究所 | A kind of underwater robot can portable horizontal direction geological sampling drilling tool |
| CN109612658A (en) * | 2018-12-24 | 2019-04-12 | 人本集团有限公司 | Detect the device of semi-rigid bearing rigidity |
| CN110132510A (en) * | 2019-05-20 | 2019-08-16 | 天津飞旋科技有限公司 | A kind of radial magnetic bearing stiffness measurement device |
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Application publication date: 20170308 |