CN110631533A - Method for acquiring and adjusting radial clearance of bearing and system - Google Patents
Method for acquiring and adjusting radial clearance of bearing and system Download PDFInfo
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- CN110631533A CN110631533A CN201910893643.6A CN201910893643A CN110631533A CN 110631533 A CN110631533 A CN 110631533A CN 201910893643 A CN201910893643 A CN 201910893643A CN 110631533 A CN110631533 A CN 110631533A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/16—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring distance of clearance between spaced objects
Abstract
The embodiment of the invention provides a method for acquiring radial play of a bearing, which comprises the following steps: acquiring the temperature of an inner ring and the temperature of an outer ring of the bearing; and acquiring the radial clearance of the bearing at least according to the temperature of the inner ring and the temperature of the outer ring. Therefore, according to the method for acquiring the radial clearance of the bearing provided by the embodiment of the invention, in the working process of the bearing, the radial clearance of the bearing is acquired continuously by acquiring the temperature of the inner ring and the temperature of the outer ring of the bearing, so that measures can be further taken to adjust the radial clearance of the bearing. It can be seen that the method for acquiring the radial clearance of the bearing provided by the embodiment of the invention fully considers the difference of the temperature conditions of the inner ring and the outer ring in the working process and the influence of the difference of the temperature of the inner ring and the temperature of the outer ring on the radial clearance of the bearing, and ensures that the acquired radial clearance of the bearing is more accurate.
Description
Technical Field
The embodiment of the invention relates to the field of bearing equipment, in particular to a method and a system for acquiring and adjusting radial play of a bearing.
Background
The radial play of the bearing is a critical parameter affecting the normal use of the bearing. Under the same load and rotating speed, the same bearing has different service lives because of different radial play under the working condition of the bearing. This is because the radial play of the bearing affects the stress on the rolling elements inside the bearing and thus the life of the bearing, and therefore, in order to extend the life of the bearing, it is necessary to know the radial play in the operating state of the bearing.
The existing radial play measured under the working state of the bearing is not accurate enough.
Therefore, how to improve the accuracy of the radial play measurement result in the working state of the bearing becomes a technical problem that needs to be solved urgently by those skilled in the art.
Disclosure of Invention
The embodiment of the invention solves the technical problem of how to improve the accuracy of the radial play measurement result in the bearing working state.
In order to solve the above problem, an embodiment of the present invention provides a method for acquiring a radial clearance of a bearing, including:
acquiring the temperature of an inner ring and the temperature of an outer ring of the bearing;
acquiring the radius of the inner ring of the bearing according to the temperature of the inner ring, and acquiring the radius of the outer ring of the bearing according to the temperature of the outer ring;
obtaining an axial distance between the central axis of the inner ring of the bearing and the central axis of the outer ring of the bearing at least according to the radius of the inner ring and the radius of the outer ring;
and acquiring the radial play of the bearing at least according to the axis distance.
Optionally, the method further comprises:
acquiring a first position distance between a first position of an outer ring raceway surface of the bearing and a second position of an inner ring raceway surface of the bearing, wherein the first position and the second position are positioned on the same cross section of the bearing, and a connecting line of the first position and the second position passes through an outer ring central axis and an inner ring central axis of the bearing;
the step of obtaining the axial distance between the inner ring central axis and the outer ring central axis at least according to the radius of the inner ring and the radius of the outer ring of the bearing comprises the following steps:
and obtaining the axis distance according to the inner ring radius, the outer ring radius and the first position distance.
Optionally, the method further comprises:
acquiring a second position distance between a third position of an outer ring raceway surface of the bearing and a fourth position of an inner ring raceway surface of the bearing, and a third position distance between a fifth position of the outer ring raceway surface and a sixth position of the inner ring raceway surface, wherein the third position, the fourth position, the fifth position and the sixth position are located on the same cross section of the bearing, and connecting lines of the third position, the fourth position, the fifth position and the sixth position pass through at least one of an outer ring central axis and an inner ring central axis of the bearing;
the step of obtaining the axial distance between the inner ring central axis and the outer ring central axis at least according to the radius of the inner ring and the radius of the outer ring of the bearing comprises the following steps:
and obtaining the axial distance between the central axis of the inner ring of the bearing and the central axis of the outer ring of the bearing according to the radius of the inner ring, the radius of the outer ring, the second position distance and the third position distance.
Optionally, the method further comprises:
obtaining the estimated contact deformation of a rolling body and a bearing ring of the bearing;
acquiring a first calculated radial clearance according to the estimated contact deformation and the axis distance;
calculating a radial clearance by utilizing an ith, and obtaining an ith calculation contact deformation of the rolling body and the bearing ring, wherein the i is an integer greater than or equal to 1;
obtaining the (i + 1) th calculated radial clearance by utilizing the ith calculated contact deformation, and obtaining the (i + 1) th calculated contact deformation of the rolling body and the bearing ring by utilizing the ith calculated radial clearance;
and when the absolute value of the difference between the ith calculation contact deformation and the (i + 1) th calculation contact deformation is smaller than the calculation contact deformation threshold value, and the absolute value of the difference between the ith calculation radial clearance and the (i + 1) th calculation radial clearance is smaller than the calculation radial clearance threshold value, taking the ith calculation radial clearance as the radial clearance of the bearing.
The embodiment of the invention also provides a method for adjusting the radial play of the bearing, which comprises the following steps:
acquiring the radial clearance of the bearing by using the method for acquiring the radial clearance of the bearing;
when the radial play satisfies a radial play threshold, adjusting the temperature of the bearing to adjust the radial play of the bearing.
The embodiment of the invention also provides a system for acquiring the radial play of the bearing, which comprises:
the temperature acquisition unit is suitable for acquiring the temperature of an inner ring and the temperature of an outer ring of the bearing;
the radial clearance obtaining unit is suitable for obtaining the inner ring radius of the bearing according to the inner ring temperature and obtaining the outer ring radius of the bearing according to the outer ring temperature;
obtaining an axial distance between the central axis of the inner ring of the bearing and the central axis of the outer ring of the bearing at least according to the radius of the inner ring and the radius of the outer ring;
acquiring the radial play of the bearing at least according to the axis distance;
the temperature acquisition unit comprises an inner ring temperature sensor and an outer ring temperature sensor, the inner ring temperature sensor is arranged on the inner ring of the bearing, and the outer ring temperature sensor is arranged on the outer ring of the bearing.
Optionally, the method further comprises:
the first position distance acquiring unit is suitable for acquiring a first position distance between a first position of an outer ring raceway surface of the bearing and a second position of an inner ring raceway surface of the bearing, wherein the first position and the second position are positioned on the same cross section of the bearing, and a connecting line of the first position and the second position passes through an outer ring central axis and an inner ring central axis of the bearing;
the radial play acquiring unit is suitable for acquiring the axis distance according to the inner ring radius, the outer ring radius and the first position distance;
the first distance acquisition unit is a first distance sensor, the first distance sensor is arranged on the raceway surface of any bearing ring of the bearing, the probe direction of the first distance sensor points to the other bearing ring of the bearing, and the probe direction of the first distance sensor is located on the straight line of the cross section of the bearing and passes through the central axis of the bearing ring.
Optionally, the method further comprises:
a second position distance acquiring unit adapted to acquire a second position distance between a third position of an outer ring raceway surface of the bearing and a fourth position of an inner ring raceway surface of the bearing;
a third distance obtaining unit adapted to obtain a third position distance between a fifth position of an outer ring raceway surface of the bearing and a sixth position of the inner ring raceway surface, wherein the third position, the fourth position, the fifth position, and the sixth position are located on the same cross section of the bearing, and a connection line of the fourth position, the fifth position, and the sixth position passes through at least one of an outer ring central axis and an inner ring central axis of the bearing;
the radial play acquiring unit is suitable for acquiring an axial distance between the central axis of the inner ring of the bearing and the central axis of the outer ring of the bearing according to the radius of the inner ring, the radius of the outer ring, the second position distance and the third position distance;
the second distance acquisition unit is a second distance sensor, the third distance acquisition unit is a third distance sensor, the second distance sensor and the third distance sensor are arranged on the raceway surface of the same bearing ring of the bearing, the probe directions of the second distance sensor and the third distance sensor point to the other bearing ring of the bearing and are positioned on the same straight line, and the straight line is positioned on the central axis of the cross section of the bearing and passing through the bearing ring.
Optionally, the method further comprises:
the estimated contact deformation obtaining unit is suitable for obtaining estimated contact deformation of a rolling body and a bearing ring of the bearing;
the radial play acquisition unit is adapted to:
acquiring a first calculated radial clearance according to the estimated contact deformation and the axis distance;
calculating a radial clearance by utilizing an ith, and obtaining an ith calculation contact deformation of the rolling body and the bearing ring, wherein the i is an integer greater than or equal to 1;
obtaining the (i + 1) th calculated radial clearance by utilizing the ith calculated contact deformation, and obtaining the (i + 1) th calculated contact deformation of the rolling body and the bearing ring by utilizing the ith calculated radial clearance;
and when the absolute value of the difference between the ith calculation contact deformation and the (i + 1) th calculation contact deformation is smaller than the calculation contact deformation threshold value, and the absolute value of the difference between the ith calculation radial clearance and the (i + 1) th calculation radial clearance is smaller than the calculation radial clearance threshold value, taking the ith calculation radial clearance as the radial clearance of the bearing.
The embodiment of the invention also provides a system for adjusting the radial play of the bearing, which comprises:
the system for acquiring the radial clearance of the bearing;
a temperature adjusting unit adapted to adjust a temperature of the bearing to adjust a radial play of the bearing when the radial play satisfies a radial play threshold;
the temperature adjustment unit includes:
the heat absorption part is in a spiral pipe shape and is arranged in the hollow shaft at the position where the bearing is arranged;
the heat release part is arranged on the position, far away from the bearing, of the hollow shaft;
and the conveying pump is arranged in the hollow shaft, and the heat absorption part, the heat release part and the conveying pump are communicated through a conduit.
Compared with the prior art, the technical scheme of the embodiment of the invention has the advantages and effects that:
the embodiment of the invention provides a method for acquiring radial play of a bearing, which comprises the following steps: acquiring the temperature of an inner ring and the temperature of an outer ring of the bearing; and acquiring the radial clearance of the bearing at least according to the temperature of the inner ring and the temperature of the outer ring.
Therefore, according to the method for acquiring the radial clearance of the bearing provided by the embodiment of the invention, in the working process of the bearing, the radial clearance of the bearing is acquired continuously by acquiring the temperature of the inner ring and the temperature of the outer ring of the bearing, so that measures can be further taken to adjust the radial clearance of the bearing. It can be seen that the method for acquiring the radial clearance of the bearing provided by the embodiment of the invention fully considers the difference of the temperature conditions of the inner ring and the outer ring in the working process and the influence of the difference of the temperature of the inner ring and the temperature of the outer ring on the radial clearance of the bearing, and ensures that the acquired radial clearance of the bearing is more accurate.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic representation of bearing life as a function of radial play under operating conditions;
FIG. 2 is a schematic flow chart of a method for acquiring radial play of a bearing according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a relative position of a bearing ring according to the method for acquiring radial play of a bearing provided by the embodiment of the present invention;
FIG. 4 is a schematic diagram of the relative position of another bearing ring in the method for acquiring the radial play of the bearing provided by the embodiment of the invention;
fig. 5 is a schematic flow chart of a method for adjusting radial play of a bearing according to an embodiment of the present invention;
FIG. 6 is a schematic view of a system for acquiring radial play of a bearing provided by an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a system for acquiring radial play of a bearing provided by an embodiment of the present invention;
FIG. 8 is another schematic structural diagram of a system for acquiring radial play of a bearing provided by an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a temperature adjustment unit of the adjustment system for radial play of a bearing provided in the embodiment of the present invention;
fig. 10 is a partial structural schematic diagram of an adjustment system for radial play of a bearing provided in an embodiment of the present invention.
Legend: 1. a temperature acquisition unit; 2. a radial play acquisition unit; 11. a first distance sensor; 12. a second distance sensor; 13. a third distance sensor; 14. an inner ring temperature sensor; 15. an outer ring temperature sensor; 21. a heat absorbing part; 22. a heat releasing section; 23. a delivery pump.
Detailed Description
It is known from the background art that the working play of a bearing has a great influence on the working life of the bearing.
Referring to fig. 1, fig. 1 is a schematic view illustrating the variation of the bearing life with the radial play in the operating state.
According to fig. 1, the life of the bearing is maximized in the case of a defined operating condition as the radial play varies in the operating state of the bearing. The optimal working clearance can be obtained through calculation of a bearing mechanical analysis model or actual test.
For a radial bearing, the radial play in the operating state can be obtained by the following formula:
ur＝u0+Δua+ΔuT；
wherein u isr-radial play in the working condition of the bearing;
u0initial design radial play u of the bearing0；
Δua-amount of change in radial play of the bearing due to interference mounting;
ΔuT-the amount of change in radial play of the bearing due to temperature changes.
Generally, after the bearing is assembled, the initial designed radial clearance of the bearing and the variation of the radial clearance of the bearing caused by interference installation are kept unchanged, and the radial clearance of the bearing in the working state is mainly related to the variation of the radial clearance of the bearing caused by temperature change.
The radial play of the bearing in the working state can be indirectly calculated by using the formula through measuring the overall temperature of the bearing, but the difference between the calculated result and the actual radial play is large because the conditions set by the formula are ideal.
Therefore, in order to improve the accuracy of a radial play measurement result in a bearing working state, an embodiment of the present invention provides a method for obtaining a bearing radial play, including:
acquiring the temperature of an inner ring and the temperature of an outer ring of the bearing;
and acquiring the radial clearance of the bearing at least according to the temperature of the inner ring and the temperature of the outer ring.
Therefore, according to the method for acquiring the radial clearance of the bearing provided by the embodiment of the invention, in the working process of the bearing, the radial clearance of the bearing is acquired continuously by acquiring the temperature of the inner ring and the temperature of the outer ring of the bearing, so that measures can be further taken to adjust the radial clearance of the bearing.
It can be seen that the method for acquiring the radial clearance of the bearing provided by the embodiment of the invention fully considers the difference of the temperature conditions of the inner ring and the outer ring in the working process and the influence of the difference of the temperature of the inner ring and the temperature of the outer ring on the radial clearance of the bearing, and ensures that the acquired radial clearance of the bearing is more accurate.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 2, fig. 2 is a schematic flow chart of a method for acquiring radial play of a bearing according to an embodiment of the present invention.
The embodiment of the invention provides a method for acquiring radial play of a bearing, which comprises the following steps:
step S10: and acquiring the temperature of the inner ring and the temperature of the outer ring of the bearing.
It will be appreciated that in order to obtain the inner and outer ring temperatures of the bearing, wireless temperature sensors may be provided in the vicinity of the bearing, in particular on the inner and outer rings of the bearing, respectively.
Step S11: and acquiring the radial clearance of the bearing at least according to the temperature of the inner ring and the temperature of the outer ring.
It should be noted that, the herein described obtaining the radial play of the bearing according to at least the inner ring temperature and the outer ring temperature means that the radial play of the bearing may be obtained only according to the inner ring temperature and the outer ring temperature, or the radial play of the bearing may be obtained according to the inner ring temperature, the outer ring temperature and other data.
After the inner ring temperature and the outer ring temperature are obtained, the radial clearance of the bearing is obtained based on the inner ring temperature and the outer ring temperature, specifically, the radial clearance of the bearing can be directly obtained by a method utilizing a fitting formula, the inner ring radius and the outer ring radius of the bearing can also be obtained through the inner ring temperature and the outer ring temperature of the bearing, the axial distance between the inner ring central axis of the bearing and the outer ring central axis of the bearing is obtained by utilizing the inner ring radius and the outer ring radius of the bearing, and the radial clearance of the bearing is obtained by utilizing the axial distance.
It can be seen that, according to the method for acquiring the radial clearance of the bearing provided by the embodiment of the invention, the radial clearance of the bearing is acquired by acquiring the temperature of the inner ring and the temperature of the outer ring of the bearing, the difference of the temperature conditions of the inner ring and the outer ring in the working process and the influence of the difference of the temperature of the inner ring and the temperature of the outer ring on the radial clearance of the bearing are fully considered, and the acquired radial clearance of the bearing is ensured to be more accurate.
In order to further improve the accuracy of the obtained radial play of the bearing, in a specific implementation manner, the method for obtaining the radial play of the bearing according to the embodiment of the present invention may include:
firstly, the inner ring radius of the bearing is obtained according to the inner ring temperature, and the outer ring radius of the bearing is obtained according to the outer ring temperature.
It will be appreciated that the outer ring radius R of the bearing1And inner circle radius R2Mainly related to temperature, and the radius R of the outer ring caused by thermal expansion under the condition of different temperature field distributions can be obtained by calculating the temperature fields of the inner ring and the outer ring of the bearing1And inner circle radius R2As a result of the change in (c), further canAnd acquiring the radius of the inner ring of the bearing according to the temperature of the inner ring, and acquiring the radius of the outer ring of the bearing according to the temperature of the outer ring.
After the radius of the inner ring and the radius of the outer ring are obtained, the axial distance between the central axis of the inner ring of the bearing and the central axis of the outer ring of the bearing is obtained, and specifically, the axial distance between the central axis of the inner ring of the bearing and the central axis of the outer ring of the bearing can be obtained at least according to the radius of the inner ring and the radius of the outer ring.
In an embodiment, please refer to fig. 3, fig. 3 is a schematic diagram of a relative position of a bearing ring in the method for acquiring radial play of a bearing according to an embodiment of the present invention.
As shown in the figure, it can be seen that the axial distance between the central axis of the inner ring of the bearing and the central axis of the outer ring of the bearing is O in the figure1O2And is and
O1O2＝R1-R2-Dmin；
wherein, O1O2-an axial distance between an inner ring central axis of the bearing and an outer ring central axis of the bearing;
R1-the outer ring radius;
R2-inner circle radius;
Dmin-minimum distance between outer and inner ring raceway surfaces in working condition.
Minimum distance D between outer ring raceway surface and inner ring raceway surface in normal operating stateminRemains substantially unchanged and can be considered constant. Specifically, for the bearing to obtain the radial play, the minimum distance D between the outer ring raceway surface and the inner ring raceway surface of the bearing in the working state is measuredminThe method of (1).
In order to further improve the accuracy of the obtained result, in a specific embodiment, D of the bearing to be tested can also be obtained by a detection modeminFor this reason, the method for acquiring the radial play of the bearing provided by the embodiment of the present invention may further include: obtaining a distance between a first position of an outer ring raceway surface of the bearing and a second position of an inner ring raceway surface of the bearingWherein the first position and the second position are located on the same cross section of the bearing, and a connecting line of the first position and the second position passes through the central axis of the outer ring and the central axis of the inner ring of the bearing. The cross-section of the bearing is a plane perpendicular to the bearing axis, and for conventional bearings, the cross-section is generally annular.
It is understood that a and B in fig. 3 are the first position and the second position that satisfy the requirement, and the first position distance AB is the minimum distance D between the outer ring raceway surface and the inner ring raceway surface of the bearingmin。
The first position distance can be obtained through a first distance sensor, the first distance sensor is arranged on the raceway surface of any bearing ring of the bearing, the probe direction of the first distance sensor points to the other bearing ring of the bearing, and the probe direction of the first distance sensor is located on the straight line of the cross section of the bearing and passes through the central axis of the bearing ring.
The step of obtaining the axial distance between the inner ring central axis and the outer ring central axis according to at least the inner ring radius and the outer ring radius of the bearing comprises the following steps: and obtaining the axis distance according to the inner ring radius, the outer ring radius and the first position distance.
Thus, the minimum distance D between the outer ring raceway surface and the inner ring raceway surface is obtained in real timeminThe accuracy of the obtained minimum distance between the outer ring raceway surface and the inner ring raceway surface of the bearing can be improved, and the obtained radial play is improved to be more accurate.
However, since the first position and the second position are always changed when the bearing is in operation, the first position distance is not easy to be obtained in real time, and therefore, in another specific embodiment, the axis distance O may be obtained by other methods1O2。
Referring to fig. 4, fig. 4 is a schematic diagram of a relative position of another bearing ring of the method for acquiring radial play of a bearing according to the embodiment of the present invention.
As shown in the drawings, the method for acquiring radial play of a bearing provided by the embodiment of the present invention may further include: acquiring a second position distance between a third position of an outer ring raceway surface of the bearing and a fourth position of an inner ring raceway surface of the bearing and a third position distance between a fifth position of the outer ring raceway surface and a sixth position of the inner ring raceway surface, wherein the third position, the fourth position, the fifth position and the sixth position are located on the same cross section of the bearing, and connecting lines of the third position, the fourth position, the fifth position and the sixth position pass through at least one of an outer ring central axis and an inner ring central axis of the bearing.
It is to be understood that fig. 4 shows a case where the connecting lines of the fourth position, the fifth position, and the sixth position pass through the outer ring center axis of the bearing.
The second position distance and the third position distance are AA in the figure1And CC1Or BB1And DD1。
The second position distance and the third position distance can be acquired through a second distance sensor and a third distance sensor, the second distance sensor and the third distance sensor are arranged on a raceway surface of the same bearing ring of the bearing, the probe directions of the second distance sensor and the third distance sensor point to the other bearing ring of the bearing and are positioned on the same straight line, and the straight line is positioned on the central axis of the cross section of the bearing and passing through the bearing ring.
And after the second position distance and the third position distance are obtained, obtaining the axial distance between the central axis of the inner ring of the bearing and the central axis of the outer ring of the bearing according to the radius of the inner ring, the radius of the outer ring, the second position distance and the third position distance.
Specifically, as can be seen from FIG. 4, B1O1＝R1-BB1；
D1O1＝R1-DD1；
D1B1＝2R1-BB1-DD1；
D1E＝B1D1/2；
At triangular ED1O2In the interior of said container body,
O1E＝D1E-B1O1；
in a triangular EO1O2In the interior of said container body,
similarly in the triangle FO1O2In the interior of said container body,
therefore, the axial distance between the central axis of the inner ring of the bearing and the central axis of the outer ring of the bearing can be obtained according to the radius of the inner ring, the radius of the outer ring, the second position distance and the third position distance.
Similarly, when the connecting line of the fourth position, the fifth position and the sixth position passes through the central axis of the inner ring of the bearing, the axial distance between the central axis of the inner ring of the bearing and the central axis of the outer ring of the bearing can be obtained according to the radius of the inner ring, the radius of the outer ring, the distance of the second position and the distance of the third position.
It can be seen that, when the third position, the fourth position, the fifth position and the sixth position are kept fixed, the second position distance and the third position distance can be obtained in real time, and the axis distance can be further obtained, so that the instantaneity of obtaining the axis distance is improved.
And finally, obtaining the radial clearance of the bearing at least according to the axis distance after obtaining the axis distance.
It will be appreciated that the axial distance can be considered to be half the radial play of the bearing, i.e.:
wherein, O1O2-an axial distance between an inner ring central axis of the bearing and an outer ring central axis of the bearing;
urradial play of the bearing.
Thereby obtaining O1O2The radial play of the bearing can be obtained.
Therefore, the inner ring radius and the outer ring radius of the bearing are obtained through the inner ring temperature and the outer ring temperature of the bearing, the first position distance or the second position distance and the third position distance are obtained in real time, the axial distance between the inner ring central axis of the bearing and the outer ring central axis of the bearing is obtained, and finally the radial clearance of the bearing is obtained.
However, when the load of the bearing is large, a large contact deformation may occur due to the load acting between the rolling elements of the bearing and the bearing ring, and the larger the load is, the larger the contact deformation is, which will directly affect the accuracy of the obtained radial play, and in order to ensure the accuracy of the obtained radial play, the contact deformation of the bearing needs to be considered at the same time when the radial play of the bearing is obtained, for this reason, in a specific embodiment, the method for obtaining the radial play of the bearing provided by the embodiment of the present invention may further include: obtaining the estimated contact deformation of a rolling body and a bearing ring of the bearing;
at the same time, the step of acquiring the radial play of the bearing at least according to the axis distance may be converted into: and acquiring the radial play of the bearing according to the axis distance and the estimated contact deformation.
Further, it is easily understood that, in consideration of contact deformation of the rolling elements and the bearing rings of the bearing, the relationship between the axial distance and the radial play becomes:
Wherein, O1O2-an axial distance between an inner ring central axis of the bearing and an outer ring central axis of the bearing;
ur-radial play of the bearing;
δr-deformation of the rolling elements of the bearing in contact with the bearing rings.
Because the estimated contact deformation is influenced by the load in the estimated bearing working state and the structural size of each part of the bearing, the estimated contact deformation can be obtained by utilizing the load in the estimated bearing working state and the structural size of each part of the bearing and establishing a bearing balance equation and solving the numerical value. The predicted contact deformation does not vary much when the load is determined. Therefore, the radial play of the bearing can be directly obtained according to the axial distance and the estimated contact deformation, and compared with a method without considering the contact deformation, the method has the advantage that the obtained result is more accurate.
When the load of the bearing changes, the estimated contact deformation cannot reflect the deformation between the rolling element and the bearing ring in the bearing running process, so that the accuracy of the obtained radial play also has a certain influence, and in order to obtain a more accurate result, the accuracy of the obtained result needs to be improved, specifically, the step of obtaining the radial play of the bearing according to the axis distance and the estimated contact deformation in the method for obtaining the radial play of the bearing provided by the embodiment of the present invention may include:
acquiring a first calculated radial clearance according to the estimated contact deformation and the axis distance;
calculating a radial clearance by utilizing an ith, and obtaining an ith calculation contact deformation of the rolling body and the bearing ring, wherein the i is an integer greater than or equal to 1;
obtaining the (i + 1) th calculated radial clearance by utilizing the ith calculated contact deformation, and obtaining the (i + 1) th calculated contact deformation of the rolling body and the bearing ring by utilizing the ith calculated radial clearance;
and when the absolute value of the difference between the ith calculation contact deformation and the (i + 1) th calculation contact deformation is smaller than the calculation contact deformation threshold value, and the absolute value of the difference between the ith calculation radial clearance and the (i + 1) th calculation radial clearance is smaller than the calculation radial clearance threshold value, taking the ith calculation radial clearance as the radial clearance of the bearing.
In other words, in the process of acquiring the radial play of the bearing, firstly, acquiring a first calculated radial play according to the estimated contact deformation and the axis distance;
obtaining a first calculated contact deformation of the rolling body and the bearing ring by using a first calculated radial play;
obtaining a second calculated radial clearance by using the first calculated contact deformation, and obtaining a second calculated contact deformation of the rolling body and the bearing ring by using the second calculated radial clearance;
when the absolute value of the difference between the first calculated contact deformation and the second calculated contact deformation is smaller than a calculated contact deformation threshold value and the absolute value of the difference between the first calculated radial play and the second calculated radial play is smaller than a calculated radial play threshold value, taking the first calculated radial play as the radial play of the bearing;
when the absolute value of the difference between the first calculated contact deformation and the second calculated contact deformation is greater than or equal to a calculated contact deformation threshold value, or the absolute value of the difference between the first calculated radial play and the second calculated radial play is greater than or equal to a calculated radial play threshold value, continuing calculation;
obtaining a third calculated radial play by using the second calculated contact deformation, and obtaining a third calculated contact deformation of the rolling element and the bearing ring by using the third calculated radial play;
when the absolute value of the difference between the second calculated contact deformation and the third calculated contact deformation is smaller than a calculated contact deformation threshold value and the absolute value of the difference between the second calculated radial play and the third calculated radial play is smaller than a calculated radial play threshold value, taking the second calculated radial play as the radial play of the bearing;
when the absolute value of the difference between the second calculated contact deformation and the third calculated contact deformation is greater than or equal to a calculated contact deformation threshold value, or the absolute value of the difference between the second calculated radial play and the third calculated radial play is greater than or equal to a calculated radial play threshold value, continuing calculation;
until the desired radial play of the bearing is obtained.
And obtaining the radial clearance of the bearing according to the axis distance and the estimated contact deformation by using an iterative calculation mode and continuously performing iterative calculation, wherein the difference between the contact deformation of the rolling element and the bearing ring of the obtained bearing and the contact deformation of the radial clearance of the rolling element and the bearing ring of the actual bearing and the radial clearance of the bearing is smaller and smaller until the absolute value of the difference is smaller than a set threshold value, the obtained result is considered to meet the requirement, and the obtained calculated radial clearance is used as the radial clearance of the bearing. Therefore, the contact deformation of the rolling body and the bearing ring of the bearing and the radial clearance of the bearing are obtained in an iterative calculation mode, and the obtaining is more accurate.
After the radial play of the bearing, the working state of the bearing can be monitored by utilizing the radial play of the bearing, and the corresponding play of the bearing when the radial play is the longest in service life can be adjusted to prolong the service life of the bearing. As can be seen from the radial play in the operating state, the radial play in the operating state of the bearing can be indirectly adjusted by adjusting the temperature of the bearing.
Referring to fig. 5, fig. 5 is a schematic flow chart illustrating a method for adjusting a radial clearance of a bearing according to an embodiment of the present invention.
In a specific implementation manner, an embodiment of the present invention further provides a method for adjusting a radial play of a bearing, including:
step S1: acquiring the radial clearance of the bearing by using the method for acquiring the radial clearance of the bearing; step S2: when the radial play satisfies a radial play threshold, adjusting the temperature of the bearing to adjust the radial play of the bearing.
The radial play threshold may be determined in accordance with an operating condition of the bearing.
As can be seen from the above formula, the radial play of the bearing is affected by the temperature. Specifically, when the inner ring of the bearing is a rotating ring, the inner ring generally generates more heat, the radial clearance is reduced along with the temperature rise, and at the moment, the temperature of the inner ring of the bearing can be reduced, so that the radial clearance in a working state is increased, and the purpose of prolonging the service life of the bearing is achieved.
In a similar way, under the condition that the outer ring of the bearing is a rotating ring, the outer ring generally generates more heat, the radial clearance can be increased along with the temperature rise, and the temperature of the outer ring of the bearing can be reduced at the moment, so that the radial clearance in the working state is reduced, and the purpose of prolonging the service life of the bearing is achieved.
The method for adjusting the radial clearance of the bearing provided by the embodiment of the invention indirectly adjusts the radial clearance of the bearing in a working state by adjusting the temperature of the bearing, thereby prolonging the service life of the bearing.
In a specific embodiment, in the method for adjusting the radial clearance of the bearing provided by the embodiment of the invention, the radial clearance of the bearing can be adjusted by using a temperature adjusting unit arranged on the bearing.
According to the method for adjusting the radial clearance of the bearing provided by the embodiment of the invention, the temperature of the inner ring or the outer ring of the bearing can be adjusted through the temperature adjusting unit, and when the temperature of the inner ring or the outer ring of the bearing changes, the expansion amount of the inner ring or the outer ring of the bearing changes along with the temperature adjusting unit, so that the radial clearance of the bearing changes, the radial clearance of the bearing in a working state can be adjusted, and the service life of the bearing is prolonged.
The following describes a system for acquiring and adjusting radial play of a bearing provided by an embodiment of the present invention, and the system for acquiring and adjusting radial play of a bearing described below can be regarded as a functional module architecture and a specific device that are required to implement the method for acquiring and adjusting radial play of a bearing provided by an embodiment of the present invention, respectively. The contents of the system for taking up and adjusting the radial play of the bearing described below may be referred to in correspondence with the system for taking up and adjusting the radial play of the bearing described above, respectively.
Referring to fig. 6, fig. 6 is a schematic view of a system for acquiring radial play of a bearing according to an embodiment of the present invention.
As shown in the drawings, an embodiment of the present invention provides a system for acquiring radial play of a bearing, including:
the temperature acquisition unit 1 is suitable for acquiring the temperature of an inner ring and the temperature of an outer ring of the bearing;
and the radial play acquisition unit 2 is suitable for acquiring the radial play of the bearing at least according to the inner ring temperature and the outer ring temperature.
In a specific implementation manner, in the system for acquiring radial play of a bearing provided by an embodiment of the present invention, the radial play acquiring unit is adapted to acquire the radial play of the bearing according to at least an inner ring temperature and an outer ring temperature of the bearing, and includes:
acquiring the radius of the inner ring of the bearing according to the temperature of the inner ring, and acquiring the radius of the outer ring of the bearing according to the temperature of the outer ring;
obtaining an axial distance between the central axis of the inner ring of the bearing and the central axis of the outer ring of the bearing at least according to the radius of the inner ring and the radius of the outer ring;
and acquiring the radial play of the bearing at least according to the axis distance.
In a specific implementation manner, the system for acquiring radial play of a bearing provided by the embodiment of the present invention further includes:
the first position distance acquiring unit is suitable for acquiring a first position distance between a first position of an outer ring raceway surface of the bearing and a second position of an inner ring raceway surface of the bearing, wherein the first position and the second position are positioned on the same cross section of the bearing, and a connecting line of the first position and the second position passes through an outer ring central axis and an inner ring central axis of the bearing;
the radial play obtaining unit is adapted to obtain the axis distance according to the inner ring radius, the outer ring radius and the first position distance.
In a specific implementation manner, in the system for acquiring a radial clearance of a bearing provided in the embodiment of the present invention, the first distance acquiring unit is a first distance sensor 11, the first distance sensor 11 is disposed on a raceway surface of any one of bearing rings of the bearing, a probe direction of the first distance sensor 11 points to another bearing ring of the bearing, and a straight line in which the probe direction of the first distance sensor 11 is located on a cross section of the bearing and passes through a central axis of the bearing ring.
Referring to fig. 7, fig. 7 is a schematic structural diagram of a system for acquiring radial play of a bearing according to an embodiment of the present invention.
In fig. 7, the first distance sensor 11 is mounted on the inner ring of the bearing, but the first distance sensor 11 may be mounted on the outer ring of the bearing, and fig. 7 does not limit the embodiment of the present invention.
Under the working state of the bearing, because the inner ring and the outer ring rotate relatively, the probe of the first distance sensor 11 arranged on the inner ring or the outer ring can measure the distance between the probe and the other bearing ring in real time, when the straight line of the probe direction is positioned on the cross section of the bearing and passes through the central axis of the bearing ring, and when the probe is positioned at the point with the shortest distance to the other bearing ring, the measured distance is the minimum distance D between the outer ring raceway surface and the inner ring raceway surface under the working statemin. In practical operation, the shortest distance measured in a certain time period can be used as the minimum distance D between the outer ring raceway surface and the inner ring raceway surface in the working statemin. In order to obtain more accurate results, a plurality of distance sensors meeting the setting requirements can be simultaneously placed on the bearing ring.
In another specific implementation manner, the system for acquiring radial play of a bearing provided by the embodiment of the present invention further includes:
a second position distance acquiring unit adapted to acquire a second position distance between a third position of an outer ring raceway surface of the bearing and a fourth position of an inner ring raceway surface of the bearing;
a third distance obtaining unit adapted to obtain a third position distance between a fifth position of an outer ring raceway surface of the bearing and a sixth position of the inner ring raceway surface, wherein the third position, the fourth position, the fifth position, and the sixth position are located on the same cross section of the bearing, and a connection line of the fourth position, the fifth position, and the sixth position passes through at least one of an outer ring central axis and an inner ring central axis of the bearing;
the radial play obtaining unit is adapted to obtain an axial distance between an inner ring central axis of the bearing and an outer ring central axis of the bearing according to the inner ring radius, the outer ring radius, the second position distance and the third position distance.
In a specific implementation manner, in the system for acquiring a radial clearance of a bearing provided in the embodiment of the present invention, the second distance acquiring unit is a second distance sensor 12, the third distance acquiring unit is a third distance sensor 13, the second distance sensor 12 and the third distance sensor 13 are disposed on a raceway surface of a same bearing ring of the bearing, probe directions of the second distance sensor 12 and the third distance sensor 13 point to another bearing ring of the bearing and are located on a same straight line, and the straight line is located on a cross section of the bearing and passes through a central axis of the bearing ring.
Referring to fig. 8, fig. 8 is another schematic structural diagram of a system for acquiring radial play of a bearing according to an embodiment of the present invention.
In fig. 8, the second distance sensor 12 and the third distance sensor 13 are mounted on the outer ring of the bearing, but the second distance sensor 12 and the third distance sensor 13 may also be mounted on the inner ring of the bearing at the same time, and fig. 8 does not limit the embodiment of the present invention.
In the working state of the bearing, because the inner ring and the outer ring rotate relatively, the probes of the second distance sensor 12 and the third distance sensor 13 arranged on the inner ring or the outer ring can measure the distance between the probe and the other bearing ring in real time, and the axial distance between the central axis of the inner ring of the bearing and the central axis of the outer ring of the bearing can be obtained by utilizing the radius of the inner ring, the radius of the outer ring, the second position distance and the third position distance, so that the radial clearance of the bearing is obtained.
Since the second positional distance and the third positional distance can be obtained in real time, the radial play of the bearing can be obtained in real time.
The outer envelope of the ribs of the outer ring does not necessarily have to be a standard circle, taking into account that the bearing ring will be deformed in its entirety after loading. Therefore, a plurality of pairs of distance sensors can be arranged in the circumferential direction to ensure the accuracy of the test result. In addition, one or more pairs of displacement sensors can be arranged on two sides of the bearing respectively to eliminate errors caused by the inclination of the inner ring.
The first, second and third distance sensors may be displacement measuring devices based on changes in reluctance, such as inductive sensors, eddy current sensors, etc. The basic principle is that the coil of the sensor probe can generate an alternating magnetic field, when a metal body approaches the magnetic field, the metal surface can generate induced current, the current in the corresponding probe coil changes, and the change is related to parameters such as metal permeability, coil geometry, size, distance between the probe and the surface of the metal conductor and the like. The calibrated sensor can accurately measure the distance between the probe and the measured metal surface.
When the first, second and third distance sensors are mounted on the rotating ring of the bearing, there are great requirements on the mounting firmness and the reliability of the device. In practice, the placement and mounting of the sensor can be accomplished by customizing the bearing rings or mounting collars.
In a specific implementation manner, the system for acquiring radial play of a bearing provided by the embodiment of the present invention further includes: the estimated contact deformation obtaining unit is suitable for obtaining estimated contact deformation of a rolling body and a bearing ring of the bearing;
and the radial play acquisition unit is suitable for acquiring the radial play of the bearing according to the axis distance and the predicted contact deformation.
In a specific implementation manner, in the system for acquiring radial play of a bearing provided by the embodiment of the present invention, the radial play acquiring unit is adapted to:
acquiring a first calculated radial clearance according to the estimated contact deformation and the axis distance;
calculating a radial clearance by utilizing an ith, and obtaining an ith calculation contact deformation of the rolling body and the bearing ring, wherein the i is an integer greater than or equal to 1;
obtaining the (i + 1) th calculated radial clearance by utilizing the ith calculated contact deformation, and obtaining the (i + 1) th calculated contact deformation of the rolling body and the bearing ring by utilizing the ith calculated radial clearance;
and when the absolute value of the difference between the ith calculation contact deformation and the (i + 1) th calculation contact deformation is smaller than the calculation contact deformation threshold value, and the absolute value of the difference between the ith calculation radial clearance and the (i + 1) th calculation radial clearance is smaller than the calculation radial clearance threshold value, taking the ith calculation radial clearance as the radial clearance of the bearing.
In a specific implementation manner, in the system for acquiring the radial play of the bearing provided by the embodiment of the present invention, the temperature acquiring unit includes an inner ring temperature sensor 14 and an outer ring temperature sensor 15, the inner ring temperature sensor 14 is disposed on an inner ring of the bearing, and the outer ring temperature sensor 15 is disposed on an outer ring of the bearing.
The inner ring temperature sensor 14 provided in the bearing inner ring can measure the temperature of the bearing inner ring, and the outer ring temperature sensor 15 provided in the bearing outer ring can measure the temperature of the bearing outer ring.
It can be seen that, according to the system for acquiring the radial clearance of the bearing provided by the embodiment of the invention, the radial clearance of the bearing is acquired by acquiring the temperature of the inner ring and the temperature of the outer ring of the bearing, the difference of the temperature conditions of the inner ring and the outer ring in the working process and the influence of the difference of the temperature of the inner ring and the temperature of the outer ring on the radial clearance of the bearing are fully considered, and the acquired radial clearance of the bearing is ensured to be more accurate.
The embodiment of the invention also provides a system for adjusting the radial play of the bearing, which is used for realizing the method for adjusting the radial play of the bearing.
The embodiment of the invention provides a bearing radial play adjusting system, which comprises:
the system for acquiring the radial clearance of the bearing;
a temperature adjustment unit adapted to adjust a temperature of the bearing to adjust a radial play of the bearing when the radial play satisfies a radial play threshold.
When the inner ring of the bearing is a rotating ring, the inner ring generally generates more heat, the radial clearance is reduced along with the temperature rise, the highest temperature threshold of the inner ring of the bearing is set at the moment, and when the temperature of the inner ring of the bearing exceeds the threshold, the temperature of the inner ring of the bearing can be reduced at the moment, so that the radial clearance in a working state is increased, and the purpose of prolonging the service life of the bearing is achieved.
Similarly, when the outer ring of the bearing is a rotating ring, the outer ring generally generates more heat, the radial clearance is increased along with the temperature rise, the highest temperature threshold of the outer ring of the bearing is set at the moment, and when the temperature of the outer ring of the bearing exceeds the threshold, the temperature of the outer ring of the bearing can be reduced, so that the radial clearance in the working state is reduced, and the purpose of prolonging the service life of the bearing is achieved.
In a specific implementation manner, in the adjusting system of the radial play of the bearing provided by the embodiment of the invention, the temperature adjusting unit includes:
a heat absorbing part 21 which is in a spiral pipe shape and is arranged in the hollow shaft at the position where the bearing is arranged;
a heat releasing part 22 arranged on the hollow shaft at a position far away from the bearing;
and the conveying pump 23 is arranged in the hollow shaft, and the heat absorption part, the heat release part and the conveying pump are communicated through a conduit.
Referring to fig. 9 and 10, fig. 9 is a schematic structural diagram of a temperature adjustment unit of a system for adjusting radial play of a bearing according to an embodiment of the present invention, and fig. 10 is a schematic structural diagram of a portion of the system for adjusting radial play of a bearing according to an embodiment of the present invention.
When the radial clearance meets the radial clearance threshold, the delivery pump 23 is started to drive the gas or liquid in the conduit to do circular reciprocating motion, so that heat is taken away from the heat absorption part 21 and released in the heat release part 22.
When the inner ring of the bearing is a rotating ring, the inner ring generally generates more heat, the radial clearance is reduced along with the temperature rise, and the heat absorption part 21 can be made into a spiral pipe shape and arranged inside a hollow shaft at the position where the bearing is arranged, so that the heat is conveniently taken away, and the purposes of reducing the temperature of the inner ring of the bearing and prolonging the service life of the bearing are achieved.
In the system for acquiring the radial clearance of the bearing and the system for adjusting the radial clearance of the bearing provided by the embodiment of the invention, each component structure can send signals in a wireless communication mode and the like, and the specific implementation mode can refer to the prior art for processing; the system needing power in each component structure can provide power source by adopting the modes of direct power supply, battery, wireless power supply and the like.
According to the adjusting system for the radial clearance of the bearing provided by the embodiment of the invention, the radial clearance is adjusted in real time by adjusting the temperature of the bearing by utilizing the relation between the service life of the bearing and the radial clearance and the relation between the radial clearance and the working temperature, so that the purpose of prolonging the service life of the bearing is realized.
Although the embodiments of the present invention are disclosed above, the embodiments of the present invention are not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present embodiments, and it is intended that the scope of the present embodiments be defined by the appended claims.
Claims (10)
1. A method for acquiring radial play of a bearing is characterized by comprising the following steps:
acquiring the temperature of an inner ring and the temperature of an outer ring of the bearing;
acquiring the radius of the inner ring of the bearing according to the temperature of the inner ring, and acquiring the radius of the outer ring of the bearing according to the temperature of the outer ring;
obtaining an axial distance between the central axis of the inner ring of the bearing and the central axis of the outer ring of the bearing at least according to the radius of the inner ring and the radius of the outer ring;
and acquiring the radial play of the bearing at least according to the axis distance.
2. The method for acquiring the radial play of the bearing according to claim 1, further comprising:
acquiring a first position distance between a first position of an outer ring raceway surface of the bearing and a second position of an inner ring raceway surface of the bearing, wherein the first position and the second position are positioned on the same cross section of the bearing, and a connecting line of the first position and the second position passes through an outer ring central axis and an inner ring central axis of the bearing;
the step of obtaining the axial distance between the inner ring central axis and the outer ring central axis at least according to the radius of the inner ring and the radius of the outer ring of the bearing comprises the following steps:
and obtaining the axis distance according to the inner ring radius, the outer ring radius and the first position distance.
3. The method for acquiring the radial play of the bearing according to claim 1, further comprising:
acquiring a second position distance between a third position of an outer ring raceway surface of the bearing and a fourth position of an inner ring raceway surface of the bearing, and a third position distance between a fifth position of the outer ring raceway surface and a sixth position of the inner ring raceway surface, wherein the third position, the fourth position, the fifth position and the sixth position are located on the same cross section of the bearing, and connecting lines of the third position, the fourth position, the fifth position and the sixth position pass through at least one of an outer ring central axis and an inner ring central axis of the bearing;
the step of obtaining the axial distance between the inner ring central axis and the outer ring central axis at least according to the radius of the inner ring and the radius of the outer ring of the bearing comprises the following steps:
and obtaining the axial distance between the central axis of the inner ring of the bearing and the central axis of the outer ring of the bearing according to the radius of the inner ring, the radius of the outer ring, the second position distance and the third position distance.
4. The method for acquiring the radial play of the bearing according to claim 1, further comprising:
obtaining the estimated contact deformation of a rolling body and a bearing ring of the bearing;
acquiring a first calculated radial clearance according to the estimated contact deformation and the axis distance;
calculating a radial clearance by utilizing an ith, and obtaining an ith calculation contact deformation of the rolling body and the bearing ring, wherein the i is an integer greater than or equal to 1;
obtaining the (i + 1) th calculated radial clearance by utilizing the ith calculated contact deformation, and obtaining the (i + 1) th calculated contact deformation of the rolling body and the bearing ring by utilizing the ith calculated radial clearance;
and when the absolute value of the difference between the ith calculation contact deformation and the (i + 1) th calculation contact deformation is smaller than the calculation contact deformation threshold value, and the absolute value of the difference between the ith calculation radial clearance and the (i + 1) th calculation radial clearance is smaller than the calculation radial clearance threshold value, taking the ith calculation radial clearance as the radial clearance of the bearing.
5. A method of adjusting radial play of a bearing, comprising:
acquiring the radial play of the bearing by using the radial play acquisition method of the bearing according to any one of claims 1 to 4;
when the radial play satisfies a radial play threshold, adjusting the temperature of the bearing to adjust the radial play of the bearing.
6. A system for acquiring radial play of a bearing, comprising:
the temperature acquisition unit is suitable for acquiring the temperature of an inner ring and the temperature of an outer ring of the bearing;
the radial clearance obtaining unit is suitable for obtaining the inner ring radius of the bearing according to the inner ring temperature and obtaining the outer ring radius of the bearing according to the outer ring temperature;
obtaining an axial distance between the central axis of the inner ring of the bearing and the central axis of the outer ring of the bearing at least according to the radius of the inner ring and the radius of the outer ring;
acquiring the radial play of the bearing at least according to the axis distance;
the temperature acquisition unit comprises an inner ring temperature sensor and an outer ring temperature sensor, the inner ring temperature sensor is arranged on the inner ring of the bearing, and the outer ring temperature sensor is arranged on the outer ring of the bearing.
7. The system for acquiring radial play of a bearing according to claim 6, further comprising:
the first position distance acquiring unit is suitable for acquiring a first position distance between a first position of an outer ring raceway surface of the bearing and a second position of an inner ring raceway surface of the bearing, wherein the first position and the second position are positioned on the same cross section of the bearing, and a connecting line of the first position and the second position passes through an outer ring central axis and an inner ring central axis of the bearing;
the radial play acquiring unit is suitable for acquiring the axis distance according to the inner ring radius, the outer ring radius and the first position distance;
the first distance acquisition unit is a first distance sensor, the first distance sensor is arranged on the raceway surface of any bearing ring of the bearing, the probe direction of the first distance sensor points to the other bearing ring of the bearing, and the probe direction of the first distance sensor is located on the straight line of the cross section of the bearing and passes through the central axis of the bearing ring.
8. The system for acquiring radial play of a bearing according to claim 6, further comprising:
a second position distance acquiring unit adapted to acquire a second position distance between a third position of an outer ring raceway surface of the bearing and a fourth position of an inner ring raceway surface of the bearing;
a third distance obtaining unit adapted to obtain a third position distance between a fifth position of an outer ring raceway surface of the bearing and a sixth position of the inner ring raceway surface, wherein the third position, the fourth position, the fifth position, and the sixth position are located on the same cross section of the bearing, and a connection line of the fourth position, the fifth position, and the sixth position passes through at least one of an outer ring central axis and an inner ring central axis of the bearing;
the radial play acquiring unit is suitable for acquiring an axial distance between the central axis of the inner ring of the bearing and the central axis of the outer ring of the bearing according to the radius of the inner ring, the radius of the outer ring, the second position distance and the third position distance;
the second distance acquisition unit is a second distance sensor, the third distance acquisition unit is a third distance sensor, the second distance sensor and the third distance sensor are arranged on the raceway surface of the same bearing ring of the bearing, the probe directions of the second distance sensor and the third distance sensor point to the other bearing ring of the bearing and are positioned on the same straight line, and the straight line is positioned on the central axis of the cross section of the bearing and passing through the bearing ring.
9. The system for acquiring radial play of a bearing according to claim 6, further comprising:
the estimated contact deformation obtaining unit is suitable for obtaining estimated contact deformation of a rolling body and a bearing ring of the bearing;
the radial play acquisition unit is adapted to:
acquiring a first calculated radial clearance according to the estimated contact deformation and the axis distance;
calculating a radial clearance by utilizing an ith, and obtaining an ith calculation contact deformation of the rolling body and the bearing ring, wherein the i is an integer greater than or equal to 1;
obtaining the (i + 1) th calculated radial clearance by utilizing the ith calculated contact deformation, and obtaining the (i + 1) th calculated contact deformation of the rolling body and the bearing ring by utilizing the ith calculated radial clearance;
and when the absolute value of the difference between the ith calculation contact deformation and the (i + 1) th calculation contact deformation is smaller than the calculation contact deformation threshold value, and the absolute value of the difference between the ith calculation radial clearance and the (i + 1) th calculation radial clearance is smaller than the calculation radial clearance threshold value, taking the ith calculation radial clearance as the radial clearance of the bearing.
10. An adjustment system for radial play of a bearing, comprising:
a system for acquiring the radial play of a bearing according to any one of claims 6 to 9;
a temperature adjusting unit adapted to adjust a temperature of the bearing to adjust a radial play of the bearing when the radial play satisfies a radial play threshold;
the temperature adjustment unit includes:
the heat absorption part is in a spiral pipe shape and is arranged in the hollow shaft at the position where the bearing is arranged;
the heat release part is arranged on the position, far away from the bearing, of the hollow shaft;
and the conveying pump is arranged in the hollow shaft, and the heat absorption part, the heat release part and the conveying pump are communicated through a conduit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910893643.6A CN110631533A (en) | 2019-09-20 | 2019-09-20 | Method for acquiring and adjusting radial clearance of bearing and system |
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| CN201910893643.6A CN110631533A (en) | 2019-09-20 | 2019-09-20 | Method for acquiring and adjusting radial clearance of bearing and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111678449A (en) * | 2020-07-29 | 2020-09-18 | 湘电风能有限公司 | Bearing radial clearance measuring method |
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2019
- 2019-09-20 CN CN201910893643.6A patent/CN110631533A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111678449A (en) * | 2020-07-29 | 2020-09-18 | 湘电风能有限公司 | Bearing radial clearance measuring method |
| CN111678449B (en) * | 2020-07-29 | 2021-06-25 | 湘电风能有限公司 | Bearing radial clearance measuring method |
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Application publication date: 20191231 |