CN108593170A - Device for measuring revolute pair moment of friction - Google Patents
Device for measuring revolute pair moment of friction Download PDFInfo
- Publication number
- CN108593170A CN108593170A CN201810377090.4A CN201810377090A CN108593170A CN 108593170 A CN108593170 A CN 108593170A CN 201810377090 A CN201810377090 A CN 201810377090A CN 108593170 A CN108593170 A CN 108593170A
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- CN
- China
- Prior art keywords
- baffle
- inner ring
- ring
- face
- revolute pair
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0009—Force sensors associated with a bearing
-
- 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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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The present invention proposes a kind of device for measuring revolute pair moment of friction, including holder, supporting sleeve, Internal baffle, outer baffle, chuck, swing rod, pendulum, parting of baffle bolt, multiple abutting screws and angular transducer；The method have the benefit that：A kind of device for measuring revolute pair moment of friction is proposed, which is based on conservation of energy principle, and measurement accuracy is higher, and error is smaller, and the structure of device is simple, easy to operate, is particularly suitable for Site Detection.
Description
Technical field
The present invention relates to a kind of revolute pair measurement of friction torque technologies, more particularly to one kind is for measuring rotation friction force
The device of square.
Background technology
In mechanical rotation, moment of friction is an important factor for influencing part life and equipment dependability and accuracy, to rub
Revolute pair abrasion and temperature rise can be led to by wiping torque, reduce service life and work quality, rotation zero is also resulted in when situation is serious
Part scorch makes damage parts, and influences safety, in addition, for precision instrument, moment of friction can be to the accurate of device
Property impacts, and such as the rolling bearing in aircraft gyroscope, moment of friction can impact the accuracy of bearing indication.
In the prior art, " balancing method ", base are all based on for detecting the means overwhelming majority of revolute pair moment of friction
Present principles are to install load cell in driven member upper edge rotation tangential direction, load cell can prevent driven member from rotating, so
The rotation of driving driving link, the stress caused by the moment of friction between driven member and driving link will act on driven member afterwards,
Due to being stopped by load cell, driven member meeting remains stationary, load cell can be measured on driven member driven member
Tangential stress P, finally by moment of friction is calculated；The existing measurement of friction torque instrument based on balancing method, precision
It is not very high, particularly with smaller frictional force square, the Stability and veracity of measurement is very low.
Invention content
For the problems in background technology, the present invention proposes a kind of device for measuring revolute pair moment of friction, institute
It includes outer ring and inner ring to state revolute pair, and the inner ring is socketed in outer ring, and outer ring and inner ring can relatively rotate, and innovation is：
Described device include holder, supporting sleeve, Internal baffle, outer baffle, chuck, swing rod, pendulum, parting of baffle bolt, multiple abutting screws and
Angular transducer；The backing positions are fixed, and the side of holder forms mounting surface, and a support column is provided on the mounting surface,
The axial direction and horizontal direction parallel of support column；The supporting sleeve is socketed on the support columns, the outer diameter of supporting sleeve and the inner ring
Internal diameter matches, and threaded hole is provided on the outer end face of supporting sleeve；The Internal baffle is loop configuration body, the internal diameter and branch of Internal baffle
The outer diameter of support set matches, and the outer diameter of Internal baffle is less than the outer diameter of inner ring, and Internal baffle is socketed on supporting sleeve, the inner face of Internal baffle
It is contacted with mounting surface；The revolute pair is socketed on the support columns by inner ring, and the inner face of inner ring and the outer end face of Internal baffle connect
It touches, the outer end face of inner ring is located at the outside of support column outer end face；The diameter of the outer baffle is more than the internal diameter of inner ring, is less than inner ring
Outer diameter, connecting hole is provided in the middle part of outer baffle, parting of baffle bolt is threadedly coupled after passing through connecting hole with the threaded hole, outer baffle
Inner face contacted with the outer end face of inner ring, outer baffle is pushed against on the outer end face of inner ring by parting of baffle bolt；The chuck is ring
Shape structure, chuck internal diameter are more than outer ring outer diameter, and multiple radial screw bores are provided on chuck, and multiple abutting screws correspond
Ground is arranged in multiple radial screw bores, and the peripheral surface of inner end and outer ring that screw is pushed against in the periphery of revolute pair is arranged in chuck
Contact, multiple abutting screws push against outer ring；The upper end of the swing rod is connect with chuck, and the lower end of swing rod is connect with pendulum；Institute
Angular transducer is stated to be fixed on chuck.
In aforementioned device, holder, supporting sleeve, Internal baffle, outer baffle and parting of baffle bolt make inner ring will not for fixing inner ring
It is swung with outer ring；Chuck and abutting screw enable outer ring, swing rod and pendulum for outer ring, swing rod and pendulum to be fixed together
Synchronous hunting；Angular transducer is used to detect the swing angle of pendulum length；
The principle of the present invention is：Based on conservation of energy principle it is found that in the case where noenergy is lost, the pendulum of pendulum length outer end
Dynamic height is constant, but due between inner ring and outer ring there are moment of friction, when inner ring and outer ring relative motion, moment of friction
It will do work, and then lead to energy loss so that the swing height of pendulum length outer end is lower, since position of centre of gravity and pendulum length length are equal
It can measure in advance, in test process, it is only necessary to the axial variable angle with vertical direction of pendulum length be detected by angular transducer, i.e.,
Swing high variable quantity can be calculated, along with device quality, acceleration of gravity are it is known that we can calculate moment of friction
Size；Aforementioned device is simple in structure, easy to operate, and data processing is also very easy, particularly suitable in revolute pair production process
Real-time detection；
When being detected to different revolute pairs, since revolute pair varies in weight, the center of gravity of swing part in device can be caused
Position changes, and then pendulum length is caused to change, and a pendulum length obviously less science is all detected before measuring every time, is examined to improve
The convenience of measurement, the invention also provides following preferred embodiments：The swing rod is threaded rod, and pendulum connects with swing rod screw thread
It connects, hanging ring is provided in the middle part of swing rod, the axial direction of swing rod is overlapped with the radial direction of outer ring.Based on common sense it is found that common pendulum, outside
Shape generally all will not be polymorphic structure, at this moment, then the axial direction of swing rod be made to be overlapped with the radial direction of outer ring, pendulum length direction just with swing rod
Axial coaxial, the center of gravity of swing part is inevitable in the axial direction of swing rod in device, passes through the phase of threaded adjusting pendulum and swing rod
To position, the position of center of gravity can be adjusted, when adjusting, be sling swing part by hanging ring, adjust pendulum and swing rod
Relative position, so that center of gravity is located at hanging ring position (whether swing rod is axial can determine again with horizontal direction parallel by observing
Whether the heart is located at hanging ring position), it so that pendulum length length is become a constant, different revolute pairs is examined every time
When survey, only position of centre of gravity need to slightly be adjusted and can be measured, greatly improve the convenience of detection.
Referring to Fig. 3, when concrete application, hanging ring is sling with rope, it is axial whether flat with horizontal direction then to observe swing rod
Row, it is such as not parallel, then the position of pendulum is adjusted, until swing rod axial direction and horizontal direction parallel, in this way, center of gravity can be made to locate always
At hanging ring position, pendulum length length will not change.
It, can also direct solution pendulum length l by the following method if inconvenient center-of-gravity regulating when practical application：
By the angular momentum theorem of single pendulum system it is found that the kinematical equation of simple harmonic motion model can be expressed as following formula：
Above formula is solved using the separation of variable, then can derive the expression formula of the cycle T of single pendulum under any angle：
Then pendulum length l can be calculated by following formula：
Wherein：α is initial angle, and g is acceleration of gravity；
For precision bearing, moment of friction often very little, when just swinging, the period can keep the calibration that compares
True numerical value, therefore pendulum length l can also be determined by theoretical calculation.
Wherein period of single pendulum T we can show that angular transducer records in transmission data by angular transducer
The angle of left and right peak, also have recorded the time used number.By handling data, we can analyze period of single pendulum T
Value.
Preferably, the Internal baffle and outer baffle are all made of elastic material making.Internal baffle that elastic material makes and outer
Baffle can effectively press from both sides inner ring steady.
Those skilled in the art in carrying out the present invention, can be operated by following method：
1) after revolute pair installs, pendulum is lifted to initial position, pendulum is then allowed to fall naturally, pendulum falls naturally
Afterwards, the uplink peak reached again is denoted as monitoring position；In aforementioned process, by angular transducer to the angle of rotation of outer ring
Degree is monitored, and obtains θ1And θ2；θ1For initial position, the angle in pendulum length direction and vertical direction；θ2At monitoring position,
The angle in pendulum length direction and vertical direction；The initial position is less than the axle center height of inner ring；
2) the moment of friction M of revolute pair is calculated according to the following formula：
Wherein, m is the quality of tilting member；G is acceleration of gravity；L is pendulum length.
It is initial position that position shown in C is marked referring to Fig. 1, in figure, and it is to monitor position to mark position shown in D, marks O
Shown position is swinging center；When measurement, pendulum is first lifted to initial position, at this point, the angle of pendulum length and vertical direction
As θ1；Then pendulum is allowed to fall naturally, pendulum is first rocked to downwards minimum point, and after minimum point, pendulum is begun to ramp up again
And reach uplink peak again, during this, due to energy loss caused by moment of friction, pendulum can not rise to just
The identical height in beginning position, is only capable of reaching at a lower height of monitoring position that (the Δ h in figure is upper pendulum caused by energy loss
Height loss), at this point, the angle of pendulum length and vertical direction is θ2；According to conservation of energy principle, moment of friction acting should be equal to
The energy of loss, then have：
M(θ1+θ2)=mgL (cos θ1-cosθ2)
To get moment of friction calculation formula above-mentioned after above formula is deformed.
The method have the benefit that：Propose a kind of device for measuring revolute pair moment of friction, the technology
Based on conservation of energy principle, measurement accuracy is higher, and error is smaller, and the structure of device is simple, easy to operate, is particularly suitable for scene inspection
It surveys.
Description of the drawings
The structural schematic diagram of rotating part in Fig. 1, device；
The cross-sectional view of Fig. 2, the present invention；
Fig. 3, center of gravity adjust the principle schematic of operation；
Title in figure corresponding to each label is respectively：Holder 1, support column 1-1, supporting sleeve 2, Internal baffle 3, outer baffle
4, chuck 5, swing rod 6, pendulum 7, parting of baffle bolt 8, abutting screw 9, angular transducer 10, hanging ring 11, inner ring A, outer ring B.
Specific implementation mode
A kind of device for measuring revolute pair moment of friction, the revolute pair includes outer ring and inner ring, the interior snare
It is connected in outer ring, outer ring and inner ring can relatively rotate, and innovation is：Described device include holder 1, supporting sleeve 2, Internal baffle 3,
Outer baffle 4, chuck 5, swing rod 6, pendulum 7, parting of baffle bolt 8, multiple abutting screws 9 and angular transducer 10；1 position of the holder
Fixed, the side of holder 1 forms mounting surface, and a support column 1-1, the axial direction and water of support column 1-1 are provided on the mounting surface
Square to parallel；The supporting sleeve 2 is socketed on support column 1-1, and the outer diameter of supporting sleeve 2 is matched with the internal diameter of the inner ring, branch
It is provided with threaded hole on the outer end face of support set 2；The Internal baffle 3 is loop configuration body, internal diameter and the supporting sleeve 2 of Internal baffle 3
Outer diameter matches, and the outer diameter of Internal baffle 3 is less than the outer diameter of inner ring, and Internal baffle 3 is socketed on supporting sleeve 2, the inner face of Internal baffle 3 with
Mounting surface contacts；The revolute pair is socketed in by inner ring on support column 1-1, the outer end face of the inner face and Internal baffle 3 of inner ring
Contact, the outer end face of inner ring are located at the outside of support column 1-1 outer end faces；The diameter of the outer baffle 4 is more than the internal diameter, small of inner ring
In the outer diameter of inner ring, 4 middle part of outer baffle is provided with connecting hole, and parting of baffle bolt 8 connects after passing through connecting hole with the threaded hole screw thread
It connects, the inner face of outer baffle 4 is contacted with the outer end face of inner ring, and outer baffle 4 is pushed against on the outer end face of inner ring by parting of baffle bolt 8；
The chuck 5 is loop configuration body, and 5 internal diameter of chuck is more than outer ring outer diameter, multiple radial screw bores are provided on chuck 5, multiple
It pushes against screw 9 to be correspondingly arranged in multiple radial screw bores, chuck 5 is arranged in the periphery of revolute pair, pushes against screw 9
Inner end is contacted with the peripheral surface of outer ring, and multiple abutting screws 9 push against outer ring；The upper end of the swing rod 6 is connect with chuck 5, pendulum
The lower end of bar 6 is connect with pendulum 7；The angular transducer 10 is fixed on chuck 5.
Further, the swing rod 6 is threaded rod, and pendulum 7 is threadedly coupled with swing rod 6, and 6 middle part of swing rod is provided with hanging ring
11, the axial direction of swing rod 6 is overlapped with the radial direction of outer ring.
Further, the Internal baffle 3 and outer baffle 4 are all made of elastic material making.
Claims (3)
1. a kind of device for measuring revolute pair moment of friction, the revolute pair includes outer ring and inner ring, the inner ring socket
In outer ring, outer ring and inner ring can relatively rotate, it is characterised in that：Described device includes holder (1), supporting sleeve (2), Internal baffle
(3), outer baffle (4), chuck (5), swing rod (6), pendulum (7), parting of baffle bolt (8), multiple abutting screws (9) and angular transducer
(10)；Holder (1) position is fixed, and the side of holder (1) forms mounting surface, and a support column is provided on the mounting surface
(1-1), the axial direction and horizontal direction parallel of support column (1-1)；The supporting sleeve (2) is socketed on support column (1-1), supporting sleeve
(2) outer diameter is matched with the internal diameter of the inner ring, and threaded hole is provided on the outer end face of supporting sleeve (2)；The Internal baffle (3) is
The internal diameter of loop configuration body, Internal baffle (3) is matched with the outer diameter of supporting sleeve (2), and the outer diameter of Internal baffle (3) is less than the outer of inner ring
Diameter, Internal baffle (3) are socketed on supporting sleeve (2), and the inner face of Internal baffle (3) is contacted with mounting surface；The revolute pair passes through interior
Snare is connected on support column (1-1), and the inner face of inner ring is contacted with the outer end face of Internal baffle (3), and the outer end face of inner ring is located at branch
The outside of dagger (1-1) outer end face；The diameter of the outer baffle (4) is more than internal diameter, the outer diameter less than inner ring of inner ring, outer baffle
(4) middle part is provided with connecting hole, and parting of baffle bolt (8) is threadedly coupled after passing through connecting hole with the threaded hole, outer baffle (4) it is interior
End face is contacted with the outer end face of inner ring, and outer baffle (4) is pushed against on the outer end face of inner ring by parting of baffle bolt (8)；The chuck (5)
For loop configuration body, chuck (5) internal diameter is more than outer ring outer diameter, multiple radial screw bores, multiple abutting spiral shells is provided on chuck (5)
Nail (9) is arranged correspondingly in multiple radial screw bores, and chuck (5) is arranged in the periphery of revolute pair, pushes against screw (9)
Inner end is contacted with the peripheral surface of outer ring, and multiple abutting screws (9) push against outer ring；The upper end of the swing rod (6) connects with chuck (5)
It connects, the lower end of swing rod (6) is connect with pendulum (7)；The angular transducer (10) is fixed on chuck (5).
2. the device according to claim 1 for measuring revolute pair moment of friction, it is characterised in that：The swing rod (6)
For threaded rod, pendulum (7) is threadedly coupled with swing rod (6), is provided with hanging ring (11) in the middle part of swing rod (6), the axial direction of swing rod (6) with it is outer
The radial of circle overlaps.
3. the device according to claim 1 or 2 for measuring revolute pair moment of friction, it is characterised in that：The interior gear
Plate (3) and outer baffle (4) are all made of elastic material making.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810377090.4A CN108593170A (en) | 2018-04-25 | 2018-04-25 | Device for measuring revolute pair moment of friction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810377090.4A CN108593170A (en) | 2018-04-25 | 2018-04-25 | Device for measuring revolute pair moment of friction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108593170A true CN108593170A (en) | 2018-09-28 |
Family
ID=63609509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810377090.4A Pending CN108593170A (en) | 2018-04-25 | 2018-04-25 | Device for measuring revolute pair moment of friction |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU539232A1 (en) * | 1975-10-20 | 1976-12-15 | Донецкое Научно-Производственное Объединение По Разработке И Выпуску Газовой Аппаратуры "Газоаппарат" | Torque measuring device |
| US4235092A (en) * | 1979-06-08 | 1980-11-25 | Burroughs Corporation | Low friction bearing running torque measuring apparatus |
| SU1525493A1 (en) * | 1986-12-19 | 1989-11-30 | Ленинградский механический институт им.Маршала Советского Союза Д.Ф.Устинова | Apparatus for monitoring bearing parameters |
| SU1707495A1 (en) * | 1990-02-14 | 1992-01-23 | Одесское Специальное Конструкторское Бюро Всесоюзного Специализированного Научно-Производственного Объединения "Союзучприбор" | Stand for experimental examination of flexible couplings |
| JPH09183544A (en) * | 1995-12-28 | 1997-07-15 | Kawasaki Steel Corp | Mechanical loss compensating method in sheet takeup control |
| CN200941071Y (en) * | 2006-06-22 | 2007-08-29 | 慈兴集团有限公司 | Friction moment measurer for microload and different speed of bearing |
| RU2343444C2 (en) * | 2006-11-27 | 2009-01-10 | Федеральное государственное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный университет кино и телевидения" ("СПбГУКиТ") | Bearing inspection apparatus |
| CN201600242U (en) * | 2010-01-28 | 2010-10-06 | 洛阳轴研科技股份有限公司 | Bearing axial rigidity measurement instrument |
| KR101279829B1 (en) * | 2011-11-28 | 2013-06-28 | 주식회사 나름 | apparatus for torque measurement |
-
2018
- 2018-04-25 CN CN201810377090.4A patent/CN108593170A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU539232A1 (en) * | 1975-10-20 | 1976-12-15 | Донецкое Научно-Производственное Объединение По Разработке И Выпуску Газовой Аппаратуры "Газоаппарат" | Torque measuring device |
| US4235092A (en) * | 1979-06-08 | 1980-11-25 | Burroughs Corporation | Low friction bearing running torque measuring apparatus |
| SU1525493A1 (en) * | 1986-12-19 | 1989-11-30 | Ленинградский механический институт им.Маршала Советского Союза Д.Ф.Устинова | Apparatus for monitoring bearing parameters |
| SU1707495A1 (en) * | 1990-02-14 | 1992-01-23 | Одесское Специальное Конструкторское Бюро Всесоюзного Специализированного Научно-Производственного Объединения "Союзучприбор" | Stand for experimental examination of flexible couplings |
| JPH09183544A (en) * | 1995-12-28 | 1997-07-15 | Kawasaki Steel Corp | Mechanical loss compensating method in sheet takeup control |
| CN200941071Y (en) * | 2006-06-22 | 2007-08-29 | 慈兴集团有限公司 | Friction moment measurer for microload and different speed of bearing |
| RU2343444C2 (en) * | 2006-11-27 | 2009-01-10 | Федеральное государственное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный университет кино и телевидения" ("СПбГУКиТ") | Bearing inspection apparatus |
| CN201600242U (en) * | 2010-01-28 | 2010-10-06 | 洛阳轴研科技股份有限公司 | Bearing axial rigidity measurement instrument |
| KR101279829B1 (en) * | 2011-11-28 | 2013-06-28 | 주식회사 나름 | apparatus for torque measurement |
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Application publication date: 20180928 |