CN108827633B - Intelligent debugging device for paired rolling bearings - Google Patents
Intelligent debugging device for paired rolling bearings Download PDFInfo
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- CN108827633B CN108827633B CN201810377082.XA CN201810377082A CN108827633B CN 108827633 B CN108827633 B CN 108827633B CN 201810377082 A CN201810377082 A CN 201810377082A CN 108827633 B CN108827633 B CN 108827633B
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention provides an intelligent debugging device for a paired rolling bearing, which is innovative in that: the intelligent debugging device for the paired rolling bearings comprises a bracket, a support sleeve, an inner baffle, an outer baffle, a C-shaped sleeve, a clamping plate, a swing rod, a pendulum bob, a connecting bolt, a tension and pressure sensor, a displacement sensor, a gasket and an angle sensor; the beneficial technical effects of the invention are as follows: the device can measure the pretightening force, the displacement and the friction torque simultaneously, so that a relation curve model of the pretightening force, the displacement and the friction torque is established, and the adjustment of the required pretightening force under different working conditions is completed in the adjustment of the actual rolling bearing according to the curve model.
Description
Technical Field
The invention relates to a friction performance testing technology of a rolling bearing, in particular to an intelligent debugging device for a paired rolling bearing.
Background
Rolling bearings are important parts in the mechanical field; when the rolling bearing is installed, the proper pretightening force has important significance for improving the service performance of the rolling bearing: the pre-tightening force is too small, so that a gap exists in the rolling bearing during working, and the working precision is influenced; the friction between the rolling body and the inner and outer raceways is obviously intensified due to overlarge pretightening force, and the service life of the rolling bearing is seriously influenced; when the rolling bearing is installed, if correct pretightening force can be applied to the rolling bearing, the operation effect of the rolling bearing can be greatly improved, so that the relation between the pretightening force and the friction torque needs to be researched, a device capable of simultaneously measuring the friction torque and the pretightening force is needed, and the prior art has few devices.
Disclosure of Invention
Aiming at the problems in the background art, the invention provides an intelligent debugging device for a paired rolling bearing, which comprises two rolling bearings to be tested, and is characterized in that: the intelligent debugging device for the paired rolling bearings comprises a bracket, a support sleeve, an inner baffle, an outer baffle, a C-shaped sleeve, a clamping plate, a swing rod, a pendulum bob, a connecting bolt, a tension and pressure sensor, a displacement sensor, a gasket and an angle sensor;
the support is fixed in position, a connecting column is arranged on the right end face of the support, the axial direction of the connecting column is parallel to the horizontal direction, a through hole penetrating through the support is formed in the connecting column, the through hole is coaxial with the connecting column, and the outer diameter of the connecting column is matched with the inner diameter of the support sleeve; the support sleeve is sleeved outside the connecting column, and the outer diameter of the support sleeve is matched with the inner diameter of the rolling bearing; the inner diameter of the inner baffle is matched with the outer diameter of the support sleeve, the outer diameter of the inner baffle is smaller than the outer diameter of the inner ring of the rolling bearing, the inner baffle is sleeved on the support sleeve, and the left end face of the inner baffle is in contact with the right end face of the support; the first rolling bearing is sleeved outside the support sleeve, and the left end face of the inner ring of the first rolling bearing is in contact with the right end face of the inner baffle; the outer diameter of the gasket is the same as that of the rolling bearing, the inner diameter of the gasket is larger than that of the outer ring of the rolling bearing, the gasket is sleeved outside the support sleeve, and the left end face of the gasket is in contact with the right end face of the outer ring of the first rolling bearing; the second rolling bearing is sleeved outside the support sleeve, and the left end face of the outer ring of the second rolling bearing is contacted with the right end face of the gasket; the inner diameter of the outer baffle is matched with the connecting bolt, the outer diameter of the outer baffle is smaller than that of the inner ring of the rolling bearing, the outer baffle is arranged on the right side of the connecting column, the left end face of the outer baffle is in contact with the right end face of the inner ring of the second rolling bearing, and a gap is reserved between the left end face of the outer baffle and the right end face of the connecting column; the connecting bolt is sleeved in an inner hole of the outer baffle plate, a bolt head of the connecting bolt is positioned on the right side of the outer baffle plate, the middle part of the connecting bolt is positioned in the through hole, and the left end of the connecting bolt is positioned on the left side of the bracket; the pull pressure sensor is provided with a threaded hole matched with the connecting bolt, the left end of the connecting bolt is in threaded connection with the pull pressure sensor, the right end face of the pull pressure sensor is in contact with the left end face of the support, and the outer baffle is abutted against the right end face of the inner ring of the second rolling bearing by the bolt head; a limiting pin is arranged on the left end face of the bracket, a limiting hole matched with the limiting pin is arranged on the right end face of the pull pressure sensor, and the limiting pin is sleeved in the limiting hole; the C-shaped sleeve is sleeved outside the rolling bearing and the washer, the clamping plate is sleeved outside the C-shaped sleeve, and the rolling bearing is clamped by the clamping plate through the C-shaped sleeve; the angle sensor is arranged on the upper end face of the clamping plate; the upper end of the swing rod is fixedly connected with the lower end of the clamping plate, and the lower end of the swing rod is connected with the pendulum bob; the displacement sensor is arranged on the right side of the connecting bolt and can measure the axial displacement of the connecting bolt.
In the foregoing apparatus: the tension and pressure sensor is used for measuring the tension of the connecting bolt, and the tension of the connecting bolt is the pre-tightening force acting on the inner ring of the rolling bearing; the displacement sensor is used for measuring the displacement of the right end face of the connecting bolt, and the displacement of the right end face of the connecting bolt is the deformation of the inside of the bearing, namely the pre-tightening displacement; the angle sensor is used for measuring the swing angle of the clamping plate, and the swing angle of the clamping plate is the swing amplitude of the outer ring of the rolling bearing; the splint consists of two plates which are connected by butterfly bolts and nuts.
The principle of the invention is as follows: according to the structure, the connecting bolt tightly supports the inner ring of the rolling bearing through the outer baffle plate, so that the inner ring of the rolling bearing cannot move along with the outer ring, the clamping plate tightly holds the outer ring of the rolling bearing through the C-shaped sleeve, and the outer ring of the rolling bearing and the clamping plate synchronously move;
during specific measurement, firstly lifting the pendulum bob to an initial position, then enabling the pendulum bob to naturally fall down, and recording an ascending highest point reached again as a monitoring position after the pendulum bob naturally falls down; in the process, the rotation angle of the outer ring is monitored through the angle sensor to obtain theta1And theta2；θ1The included angle between the length swinging direction and the vertical direction is the initial position; theta2An included angle between the length direction and the vertical direction is arranged at the monitoring position; the initial position is lower than the rolling axisThe height of the bearing axis; then, the friction torque M of the revolute pair is calculated according to the following formula:
wherein m is the mass of the oscillating member; g is the acceleration of gravity; l is the pendulum length.
Referring to fig. 2, the position marked by the mark C in the figure is the initial position, and the position marked by the mark D is the monitoring position; during measurement, the pendulum bob is lifted to an initial position, and at the moment, the included angle between the pendulum length and the vertical direction is theta1(ii) a Then the pendulum bob naturally falls, the pendulum bob firstly swings downwards to the lowest point, after the pendulum bob passes through the lowest point, the pendulum bob begins to rise again and reaches the ascending highest point again, in the process, due to energy loss caused by friction torque, the pendulum bob cannot rise to the same height as the initial position, and only can reach a monitoring position with lower height (delta h in the figure is the upward swing height loss caused by energy loss), at the moment, the included angle between the pendulum length and the vertical direction is theta2(ii) a According to the principle of conservation of energy, the friction torque should work equal to the lost energy, then:
M(θ1+θ2)＝mgL(cosθ1-cosθ2)
and (5) deforming the formula to obtain the friction torque calculation formula.
Before the friction torque measurement operation is carried out, the size of the pretightening force is adjusted by rotating the connecting bolt, the tension and pressure sensor can detect the accurate numerical value of the pretightening force, and the pretightening force numerical value corresponding to the currently measured friction torque and the displacement of the inner ring of the bearing can be read by the displacement sensor; the friction torque and the pre-tightening displacement corresponding to each pre-tightening force can be obtained by performing a plurality of tests under different pre-tightening force conditions, and the friction torque, the pre-tightening force and the pre-tightening displacement are drawn on a drawing to obtain a corresponding three-parameter change curve chart;
the three-parameter change curve graph is formed by algorithm calculation and programming, the data of the three sensors are processed by a computer control end, and finally, a final curve schematic diagram is displayed on a software interface display end through interface programming, so that the intelligent processing of the data is realized.
In the prior art, when a bearing is installed, because the pretightening force and the pretightening displacement can not be measured, the pretightening force and the pretightening displacement are usually performed by an installer according to experience, and the error is large; after the scheme of the invention is adopted, the pretightening force can be accurately set by adjusting the thickness of the adjusting gasket, and the specific operation is as follows: the design pretightening force of two rolling bearings to be installed is F0Firstly, the device of the invention is used for independently testing two rolling bearings to be installed to obtain corresponding three-parameter change curves, and then the adjusting shim to be installed (the outer diameter of the adjusting shim is smaller than that of the inner ring of the rolling bearing, and the initial thickness of the adjusting shim is set as U1) Placing between two rolling bearings to be mounted, adjusting the position of connecting bolt to make the outer baffle plate tightly press the inner ring of rolling bearing against the adjusting shim, and measuring friction torque M according to the above-mentioned test method1Then according to M1Finding out corresponding pretightening force F in the three-parameter change curve chart1And the pretension displacement L1Then according to F0Finding out the corresponding pre-tightening displacement L in the three-parameter change curve chart0And a friction torque M0Then calculate L1And L0If F is △ x1Greater than F0Adjusting the thickness of the shim to be U1Adding △ x if F1Less than F0Adjusting the thickness of the shim to be U1△ x is reduced on the basis, after the thickness of the adjusting shim is adjusted, the adjusting shim is installed between the bearings again, and the current friction torque M of the bearings is measured again2If M is present2And M0If the two parts are the same (or within an error range), the adjusting gasket is used for installing the bearing, so that the pretightening force acting on the bearing can reach F0If M is required2And M0If the deviation is larger, the new △ x is calculated again according to the mode and the thickness of the adjusting shim is further adjusted, and then the friction is measured again according to the adjusting shim with the new thicknessAnd (5) moment until the requirement is met.
The beneficial technical effects of the invention are as follows: the device can measure the pretightening force, the displacement and the friction torque simultaneously, so that a relation curve model of the pretightening force, the displacement and the friction torque is established, and the adjustment of the required pretightening force under different working conditions is completed in the adjustment of the actual rolling bearing according to the curve model.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention;
FIG. 2 is a schematic view of a swing portion;
FIG. 3 is a schematic diagram of a three-parameter variation curve;
FIG. 4 is a schematic view of adjusting the position of the spacer;
the names corresponding to each mark in the figure are respectively: the device comprises a support 1, a support sleeve 2, an inner baffle 3, an outer baffle 4, a C-shaped sleeve 5, a clamping plate 6, a swing rod 7, a pendulum bob 8, a connecting bolt 9, a tension and pressure sensor 10, a displacement sensor 11, a gasket 12, an angle sensor 13, an adjusting gasket 14, a first rolling bearing A and a second rolling bearing B.
Detailed Description
The utility model provides a pair antifriction bearing intelligent debugging device, includes the antifriction bearing of two examination awaiting measuring, and its innovation lies in: the device for measuring and adjusting the pre-tightening force of the rolling bearing comprises a bracket 1, a supporting sleeve 2, an inner baffle 3, an outer baffle 4, a C-shaped sleeve 5, a clamping plate 6, a swing rod 7, a pendulum bob 8, a connecting bolt 9, a tension and pressure sensor 10, a displacement sensor 11, a gasket 12 and an angle sensor 13;
the support 1 is fixed in position, a connecting column is arranged on the right end face of the support 1, the axial direction of the connecting column is parallel to the horizontal direction, a through hole penetrating through the support 1 is formed in the connecting column, the through hole is coaxial with the connecting column, and the outer diameter of the connecting column is matched with the inner diameter of the support sleeve 2; the support sleeve 2 is sleeved outside the connecting column, and the outer diameter of the support sleeve 2 is matched with the inner diameter of the rolling bearing; the inner diameter of the inner baffle 3 is matched with the outer diameter of the support sleeve 2, the outer diameter of the inner baffle 3 is smaller than the outer diameter of the inner ring of the rolling bearing, the inner baffle 3 is sleeved on the support sleeve 2, and the left end face of the inner baffle 3 is in contact with the right end face of the support 1; the first rolling bearing is sleeved outside the support sleeve 2, and the left end face of the inner ring of the first rolling bearing is contacted with the right end face of the inner baffle 3; the outer diameter of the gasket 12 is the same as that of the rolling bearing, the inner diameter of the gasket 12 is larger than that of the outer ring of the rolling bearing, the gasket 12 is sleeved outside the support sleeve 2, and the left end face of the gasket 12 is in contact with the right end face of the outer ring of the first rolling bearing; the second rolling bearing is sleeved outside the support sleeve 2, and the left end face of the outer ring of the second rolling bearing is contacted with the right end face of the gasket 12; the inner diameter of the outer baffle 4 is matched with the connecting bolt 9, the outer diameter of the outer baffle 4 is smaller than that of the inner ring of the rolling bearing, the outer baffle 4 is arranged on the right side of the connecting column, the left end face of the outer baffle 4 is in contact with the right end face of the inner ring of the second rolling bearing, and a gap is reserved between the left end face of the outer baffle 4 and the right end face of the connecting column; the connecting bolt 9 is sleeved in an inner hole of the outer baffle 4, the bolt head of the connecting bolt 9 is positioned on the right side of the outer baffle 4, the middle part of the connecting bolt 9 is positioned in the through hole, and the left end of the connecting bolt 9 is positioned on the left side of the bracket 1; a threaded hole matched with the connecting bolt 9 is formed in the tension and pressure sensor 10, the left end of the connecting bolt 9 is in threaded connection with the tension and pressure sensor 10, the right end face of the tension and pressure sensor 10 is in contact with the left end face of the support 1, and the outer baffle 4 is abutted against the right end face of the inner ring of the second rolling bearing by the bolt head; a limiting pin is arranged on the left end face of the bracket 1, a limiting hole matched with the limiting pin is arranged on the right end face of the pull pressure sensor 10, and the limiting pin is sleeved in the limiting hole; the C-shaped sleeve 5 is sleeved outside the rolling bearing and the gasket 12, the clamping plate 6 is sleeved outside the C-shaped sleeve 5, and the rolling bearing is clamped by the clamping plate 6 through the C-shaped sleeve 5; the angle sensor 13 is arranged on the upper end face of the clamping plate 6; the upper end of the swing rod 7 is fixedly connected with the lower end of the clamping plate 6, and the lower end of the swing rod 7 is connected with the pendulum bob 8; the displacement sensor 11 is arranged on the right side of the connecting bolt 9, and the displacement sensor 11 can measure the axial displacement of the connecting bolt 9.
When detecting different antifriction bearings, because the rolling axle bearing capacity is different, can lead to the focus position of swing portion in the device to change, and then arouse the pendulum length change, it is obviously not too scientific to detect the pendulum length once before measuring at every turn, and in order to improve the convenience of measuring volume, the inventor has still provided following preferred scheme: the swing rod 7 is a threaded rod, the pendulum bob 8 is in threaded connection with the swing rod 7, the middle of the swing rod 7 is provided with a hanging ring 7-1, and the axial direction of the swing rod 7 is overlapped with the radial direction of the support sleeve 2. Based on common knowledge, the shape of a conventional pendulum bob 8 can not be a special-shaped structure generally, at this time, the axial direction of a swing rod 7 is enabled to coincide with the radial direction of a support sleeve 2, the swing length direction is coaxial with the axial direction of the swing rod 7, the gravity center of a swing part in the device is inevitably in the axial direction of the swing rod 7, the position of the gravity center can be adjusted by adjusting the relative positions of the pendulum bob 8 and the swing rod 7 through threads, when in adjustment, the swing part is lifted through a hanging ring 7-1, the relative positions of the pendulum bob 8 and the swing rod 7 are adjusted, the gravity center is positioned at the position of the hanging ring 7-1 (whether the gravity center is positioned at the position of the hanging ring 7-1 can be determined by observing whether the axial direction of the swing rod is parallel to the horizontal direction or not), so that the length of the swing length becomes a constant, when different rolling bearings are detected, the, the convenience of detection is greatly improved.
In practical application, if the gravity center is not convenient to adjust, the pendulum length l can be directly solved by the following method:
from the theorem of angular momentum of the simple pendulum system, the kinematic equation of the simple pendulum motion model can be expressed as follows:
the above formula is solved by adopting a separation variable method, and then an expression of the period T of the simple pendulum at any angle can be deduced:
the pendulum length l can then be calculated by:
α is an initial angle, g is the acceleration of gravity;
for a precision bearing, the friction torque is often small, and when the precision bearing swings, the period keeps a relatively correct value, so that the swing length l can be determined through theoretical calculation.
The period T of the simple pendulum can be obtained through the angle sensor 13, the angle sensor records the angle of the left highest point and the right highest point in transmission data, and the used time is also recorded. By processing the data, we can analyze the value of the simple pendulum period T.
Claims (1)
1. The utility model provides a pair antifriction bearing intelligent debugging device, includes the antifriction bearing of two examination awaiting measuring, its characterized in that: the intelligent debugging device for the paired rolling bearings comprises a support (1), a support sleeve (2), an inner baffle (3), an outer baffle (4), a C-shaped sleeve (5), a clamping plate (6), a swing rod (7), a pendulum bob (8), a connecting bolt (9), a tension and pressure sensor (10), a displacement sensor (11), a washer (12) and an angle sensor (13);
the support (1) is fixed in position, a connecting column is arranged on the right end face of the support (1), the axial direction of the connecting column is parallel to the horizontal direction, a through hole penetrating through the support (1) is formed in the connecting column, the through hole is coaxial with the connecting column, and the outer diameter of the connecting column is matched with the inner diameter of the support sleeve (2); the support sleeve (2) is sleeved outside the connecting column, and the outer diameter of the support sleeve (2) is matched with the inner diameter of the rolling bearing; the inner diameter of the inner baffle (3) is matched with the outer diameter of the support sleeve (2), the outer diameter of the inner baffle (3) is smaller than the outer diameter of the inner ring of the rolling bearing, the inner baffle (3) is sleeved on the support sleeve (2), and the left end face of the inner baffle (3) is in contact with the right end face of the support (1); the first rolling bearing is sleeved outside the support sleeve (2), and the left end face of the inner ring of the first rolling bearing is in contact with the right end face of the inner baffle (3); the outer diameter of the gasket (12) is the same as that of the rolling bearing, the inner diameter of the gasket (12) is larger than that of the outer ring of the rolling bearing, the gasket (12) is sleeved outside the support sleeve (2), and the left end face of the gasket (12) is in contact with the right end face of the outer ring of the first rolling bearing; the second rolling bearing is sleeved outside the support sleeve (2), and the left end face of the outer ring of the second rolling bearing is contacted with the right end face of the gasket (12); the inner diameter of the outer baffle (4) is matched with the connecting bolt (9), the outer diameter of the outer baffle (4) is smaller than that of the inner ring of the rolling bearing, the outer baffle (4) is arranged on the right side of the connecting column, the left end face of the outer baffle (4) is in contact with the right end face of the inner ring of the second rolling bearing, and a gap is reserved between the left end face of the outer baffle (4) and the right end face of the connecting column; the connecting bolt (9) is sleeved in an inner hole of the outer baffle (4), the bolt head of the connecting bolt (9) is positioned on the right side of the outer baffle (4), the middle part of the connecting bolt (9) is positioned in the through hole, and the left end of the connecting bolt (9) is positioned on the left side of the bracket (1); a threaded hole matched with the connecting bolt (9) is formed in the tension and pressure sensor (10), the left end of the connecting bolt (9) is in threaded connection with the tension and pressure sensor (10), the right end face of the tension and pressure sensor (10) is in contact with the left end face of the support (1), and the outer baffle (4) is abutted against the right end face of the inner ring of the second rolling bearing by the bolt head; a limiting pin is arranged on the left end face of the bracket (1), a limiting hole matched with the limiting pin is arranged on the right end face of the pull pressure sensor (10), and the limiting pin is sleeved in the limiting hole; the C-shaped sleeve (5) is sleeved outside the two rolling bearings and the gasket (12), the clamping plate (6) is sleeved outside the C-shaped sleeve (5), and the two rolling bearings are clamped by the clamping plate (6) through the C-shaped sleeve (5); the angle sensor (13) is arranged on the upper end face of the clamping plate (6); the upper end of the swing rod (7) is fixedly connected with the lower end of the clamping plate (6), and the lower end of the swing rod (7) is connected with the pendulum bob (8); the displacement sensor (11) is arranged on the right side of the connecting bolt (9), and the displacement sensor (11) can measure the axial displacement of the connecting bolt (9).
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| CN201810377082.XA CN108827633B (en) | 2018-04-25 | 2018-04-25 | Intelligent debugging device for paired rolling bearings |
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| CN201810377082.XA CN108827633B (en) | 2018-04-25 | 2018-04-25 | Intelligent debugging device for paired rolling bearings |
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| FR3112203A1 (en) * | 2020-07-06 | 2022-01-07 | Alstom Transport Technologies | Device for testing parameters relating to at least one bearing, and associated test method |
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| CN110744357B (en) * | 2019-10-28 | 2021-05-14 | 河南科技大学 | Device and method for testing transient pretightening force of main shaft bearing of machine tool |
| CN110887589B (en) * | 2019-12-04 | 2021-08-17 | 兰州华汇仪器科技有限公司 | Method for measuring friction torque of bearing during rotation |
| CN112407324B (en) * | 2020-11-03 | 2022-03-29 | 中国直升机设计研究所 | Helicopter tail rotor load measuring and mounting device |
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| CN106525424A (en) * | 2016-10-27 | 2017-03-22 | 安徽江淮汽车集团股份有限公司 | Comprehensive measurement device and method for bearing rigidity and starting friction torque |
| CN107063688A (en) * | 2017-04-05 | 2017-08-18 | 上海大学 | Match angular contact ball bearing Dynamic wear test device |
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| FR3112203A1 (en) * | 2020-07-06 | 2022-01-07 | Alstom Transport Technologies | Device for testing parameters relating to at least one bearing, and associated test method |
| EP3936848A1 (en) * | 2020-07-06 | 2022-01-12 | ALSTOM Transport Technologies | Device for testing parameters relative to at least one bearing, and associated testing method |
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