CN115307802B - Stress detection system and method for rubber vibration isolation support - Google Patents
Stress detection system and method for rubber vibration isolation support Download PDFInfo
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- CN115307802B CN115307802B CN202211238459.6A CN202211238459A CN115307802B CN 115307802 B CN115307802 B CN 115307802B CN 202211238459 A CN202211238459 A CN 202211238459A CN 115307802 B CN115307802 B CN 115307802B
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- vibration isolation
- rubber vibration
- isolation support
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- 238000002955 isolation Methods 0.000 title claims abstract description 150
- 238000001514 detection method Methods 0.000 title claims abstract description 116
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000007246 mechanism Effects 0.000 claims abstract description 108
- 239000000523 sample Substances 0.000 claims abstract description 53
- 230000008569 process Effects 0.000 claims description 10
- 230000000694 effects Effects 0.000 description 4
- 238000005056 compaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0028—Force sensors associated with force applying means
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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
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
Abstract
The invention relates to a stress detection system and a method for a rubber vibration isolation support, wherein the stress detection method comprises the following steps: the conveying device conveys the rubber vibration isolation support to the detection station; probes in the multiple groups of detection mechanisms are simultaneously in elastic contact with the outer side surface of the rubber vibration isolation support; the laser transmitter projects a laser spot onto the receiving plate; collecting the positions of laser light spots projected by all laser transmitters; the force application device promotes the rubber vibration isolation support to deform in different types; when the rubber vibration isolation support is deformed, the probe is driven to swing and the laser transmitter is driven to swing in the opposite direction, and the position of a laser spot projected by the laser transmitter is changed; and collecting the positions of laser light spots projected by all laser transmitters at the moment, comparing the positions of the laser light spots projected by the same laser transmitters, and calculating the stress value of the positions by combining the elastic modulus of the rubber layer in the rubber vibration isolation support, so as to obtain the stress values of all positions of the rubber vibration isolation support in different types of deformation.
Description
Technical Field
The invention relates to a pressure detection system and a method, in particular to a stress detection system and a method for a rubber vibration isolation support.
Background
The rubber vibration isolation support is a supporting part for supporting the weight of a container or equipment and fixing the container or equipment at a certain position, and also bears vibration and earthquake load during operation, and is generally used in the fields of bridges, buildings and the like.
In the use, the rubber vibration isolation support can take place various deformation because of receiving the effect of various power, for example take place vertical deformation under the load of upper load, take place horizontal deformation under the effect of horizontal force, take place torsional deformation under torsional moment's effect, and take place the tipping under the effect of tipping moment. However, when the rubber vibration isolation support works, the rubber vibration isolation support is not only subjected to one acting force, but also subjected to the superposition of multiple acting forces, so that the rubber vibration isolation support can be deformed in multiple different ways in the use process; in order to prevent the rubber layer of the rubber vibration isolation support from being damaged due to overlarge stress, the rubber vibration isolation support needs to be subjected to stress detection before use, and the stress of each position of the rubber vibration isolation support under various deformation of the rubber vibration isolation support is detected, so that the safe use range of the rubber vibration isolation support is obtained. However, the prior art does not have a device and a method for detecting the stress value of each position of the rubber vibration isolation support in different deformations.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a stress detection system for a rubber vibration isolation support, which can detect the strain of each position of the rubber vibration isolation support under different deformations so as to obtain the stress value of each position of the rubber vibration isolation support under different deformations.
A second object of the present invention is to provide a stress detection method for the stress detection system.
The technical scheme for solving the technical problems is as follows:
the stress detection system for the rubber vibration isolation support comprises a workbench, a conveying device arranged on the workbench and used for conveying the rubber vibration isolation support to a detection station, a force application device used for applying different acting forces to the rubber vibration isolation support positioned on the detection station so as to enable the rubber vibration isolation support to deform in different types, and a detection device used for detecting the deformation of each position of the rubber vibration isolation support positioned on the detection station in the different types of deformation,
the detection device comprises a bracket and a plurality of groups of detection modules arranged on the bracket, wherein the plurality of groups of detection modules are arranged at equal angles along the circumferential direction of the detection station, each group of detection modules comprises a support, a plurality of groups of detection mechanisms arranged on the support, a feeding driving mechanism for driving the detection mechanisms to move along the radial direction of the rubber vibration isolation support and a stress calculation device,
the multiple groups of detection mechanisms are vertically arranged on the mounting seat; the feeding driving mechanism is used for driving the mounting seat to move; each group of detection mechanism comprises a probe, a laser emitter arranged at the tail end of the probe and a ball bearing arranged between the probe and the laser emitter, wherein the probe and the laser emitter are arranged at two opposite sides of the ball bearing, and the ball bearing is arranged on the mounting seat; the emission port of the laser emitter is away from the rubber vibration isolation support;
the stress calculation device comprises a receiving plate arranged on a support, an image acquisition device for acquiring laser light spots in the receiving plate and an image processing device, wherein the receiving plate is opposite to an emitting port of a laser emitter of the multiple groups of detection mechanisms; the image processing device is used for calculating the position deviation of the laser light points projected onto the receiving plate by each group of laser transmitters before and after deformation, converting the position deviation into a strain value of the position corresponding to the detection mechanism in the rubber vibration isolation support, and calculating the stress value of the position according to the relation between strain and stress.
Preferably, the force application device comprises a vertical force application mechanism and a horizontal force application mechanism, wherein the vertical force application mechanism is arranged above the bracket and comprises a plurality of groups of first vertical force application cylinders which are arranged in a circumference equal angle manner and a plurality of groups of second vertical force application cylinders which are arranged in the center of the first vertical force application cylinders which are arranged in a circumference equal angle manner; the horizontal force application mechanism comprises two groups of horizontal force application cylinders, the two groups of horizontal force application cylinders are arranged on two sides of the rubber vibration isolation support, and a piston rod of the horizontal force application cylinder is connected with the upper end of the rubber vibration isolation support.
Preferably, the force application device further comprises fixing mechanisms for fixing the lower side of the rubber vibration isolation support, wherein the plurality of groups of fixing mechanisms are arranged at equal angles along the circumferential direction of the rubber vibration isolation support; each group of fixing mechanism comprises a fixing piece, one end of the fixing piece is connected with the bracket, and the other end of the fixing piece is connected with the lower side of the rubber vibration isolation support.
Preferably, the fixing piece comprises a lantern ring and two groups of locking screws, wherein the two groups of locking screws are respectively arranged on the bracket and the rubber vibration isolation support; two ends of the lantern ring are respectively sleeved on the two groups of locking screws; the direction of the pulling force of the lantern ring on the rubber vibration isolation support is opposite to the direction of the torque received by the rubber vibration isolation support.
Preferably, a conical spring is arranged between the probe and the mounting seat, the conical spring is mounted on the mounting seat, one end of the conical spring acts on the mounting seat, and the other end of the conical spring acts on the probe; the elastic force of the conical spring promotes the probe to reset.
Preferably, the probe comprises a needle head and an elastic telescopic rod connected with the needle head, wherein the head end of the elastic telescopic rod is connected with the ball bearing, and the tail end of the elastic telescopic rod is connected with the needle head.
Preferably, the conveying device comprises a horizontal conveying mechanism and a vertical lifting mechanism, wherein the bracket is of a double-layer structure, and the force application device and the detection device are positioned on the upper layer of the bracket; the horizontal conveying mechanism is arranged on the lower layer of the support, and the vertical lifting mechanism is used for transferring the rubber vibration isolation support in the horizontal conveying mechanism to the detection station on the upper layer of the support.
Preferably, the image acquisition device is a camera.
The stress detection method for the rubber vibration isolation support comprises the following steps of:
s1, conveying a rubber vibration isolation support to be detected to a detection station by a conveying device;
s2, the feeding driving mechanism drives the mounting seat and a plurality of groups of detection mechanisms arranged on the mounting seat to move, so that probes in the plurality of groups of detection mechanisms are simultaneously in elastic contact with the outer side surface of the rubber vibration isolation support;
s3, starting the image acquisition device and the laser transmitters in each group of detection mechanisms, so that the laser transmitters project laser light spots on the receiving plate; the image acquisition device acquires the positions of laser light spots projected onto the receiving plate by the laser transmitters in the detection mechanisms of the rubber vibration isolation support in a normal state;
s4, applying force to the rubber vibration isolation support in the detection station by the force application device, so that the rubber vibration isolation support deforms in different types, in the process, the rubber vibration isolation support deforms and drives the probe to swing, in the process of swinging the probe, the laser transmitter is driven to swing in the opposite direction, and the position of a laser spot projected onto the receiving plate by the laser transmitter is changed; the image acquisition device acquires the positions of laser light spots projected onto the receiving plate by the laser transmitters in the detection mechanisms at the moment;
s5, the image processing device processes the images of the front and rear two times, compares the positions of laser spots projected to the receiving plate by the laser transmitters in the same detection mechanism, converts the positions into strain values of the positions corresponding to the detection mechanism in the rubber vibration isolation support, combines the elastic modulus of the rubber layer in the rubber vibration isolation support, and calculates stress values of the positions according to the relation between strain and stress.
Preferably, in step (5), when detecting the same type of deformation, step S4 is repeated a plurality of times, and after the strain values are calculated a plurality of times, the strain values are averaged.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the stress detection system for the rubber vibration isolation support, the feeding driving mechanism drives the multiple groups of detection mechanisms to move radially, so that probes in the multiple groups of detection mechanisms are in elastic contact with the outer side surface of the rubber vibration isolation support, after the rubber vibration isolation support is unevenly deformed (such as twisted or tipped), the probes in each group of detection mechanisms can still be elastically pressed on the rubber vibration isolation support and rotate under the promotion of the deformation force of the rubber vibration isolation support, and the laser transmitters connected with the probes synchronously and reversely swing, so that the image acquisition device can acquire the positions of changed laser spots through the receiving plate; the positions of laser light spots projected to the receiving plate by the laser transmitters in the same detection mechanism in a normal state are compared by the image processing device, so that the deformation is calculated, converted into a strain value of the position corresponding to the detection mechanism in the rubber vibration isolation support, and the stress value of the position is calculated according to the relation between strain and stress by combining the elastic modulus of the rubber layer in the rubber vibration isolation support, so that the stress value of each position of the rubber vibration isolation support under different types of deformation is obtained.
The stress detection system for the rubber vibration isolation support can detect the stress value of each position of the rubber vibration isolation support under different types of deformation, so that research personnel can obtain the stress distribution and the stress magnitude of the rubber vibration isolation support under different types of deformation through the stress value of each position in the rubber vibration isolation support, and theoretical support is provided for later improvement of the rubber vibration isolation support.
The stress detection method for the rubber vibration isolation support is simple in steps and convenient to implement.
Drawings
Fig. 1 is a block diagram of a stress detection system for a rubber vibration isolation mount of the present invention.
Fig. 2-4 are schematic perspective views of three different views of the stress detection system for a rubber vibration isolation mount according to the present invention.
Fig. 5 is a front view of the stress detecting system for the rubber vibration isolation mount of the present invention.
Fig. 6 is a schematic perspective view of a detection device.
Fig. 7 is a front view of the detection device.
Fig. 8 is a schematic structural view of the detection mechanism.
Fig. 9 is a schematic diagram of the stress detection system for a rubber vibration isolation mount of the present invention detecting stress calculations of the vibration isolation rubber mount in torsional deformations.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but embodiments of the present invention are not limited thereto.
Referring to fig. 1 to 8, the stress detection system for the rubber vibration isolation mount of the present invention comprises a table 1, a conveying device provided on the table 1 for conveying the rubber vibration isolation mount to a detection station, a force applying device for applying different forces to the rubber vibration isolation mount located on the detection station to cause different types of deformation of the rubber vibration isolation mount, and a detection device 5 for detecting the magnitude of deformation of the rubber vibration isolation mount located on the detection station at each position in the different types of deformation.
Referring to fig. 1-8, the detecting device 5 includes a support 4 and a plurality of groups of detecting modules disposed on the support 4, wherein the plurality of groups of detecting modules are arranged at equal angles along a circumferential direction of the detecting station, each group of detecting modules includes a support 501, a plurality of groups of detecting mechanisms disposed on the support 501, a feeding driving mechanism 503 for driving the detecting mechanisms to move along a radial direction of the rubber vibration isolation support, and a stress calculating device, and the plurality of groups of detecting mechanisms are vertically arranged on a mounting seat 505; the feeding driving mechanism 503 is used for driving the mounting seat 505 to move, the feeding driving mechanism 503 adopts a driving mode of combining a motor and a screw rod transmission mechanism, and is provided with a plurality of groups of guiding mechanisms to improve the movement precision, wherein the guiding mechanisms adopt a mode of combining a guiding rod and a guiding block; the motor drives the screw rod to rotate, so that the mounting seat 505 connected with the screw rod nut is driven to move, and probes in the multiple groups of detection mechanisms are contacted with the outer side surface of the rubber vibration isolation support; when the detection is completed, the feeding driving mechanism 503 may drive the multiple sets of detection mechanisms to reset.
Referring to fig. 1-8, each set of detection mechanisms includes a probe, a laser transmitter 509 disposed at a trailing end of the probe, and a ball bearing 510 disposed between the probe and the laser transmitter 509, wherein the probe and the laser transmitter 509 are mounted on opposite sides of the ball bearing 510, and the ball bearing 510 is mounted on the mount 505; the emitting port of the laser emitter 509 faces away from the rubber vibration isolation mount; by mounting the probe and the laser transmitter 509 on the ball bearing 510, the probe and the laser transmitter 509 can be rotated synchronously and at multiple angles to accommodate uneven deformation of the rubber vibration mount, and at the same time, the distance between the start position and the end position of the probe is equal to the distance between the start position and the end position of the laser transmitter 509 projected onto the receiving plate 504, but opposite in direction, based on this principle, the deformation amount of the rubber vibration mount at the position can be determined by detecting the start position and the end position of the laser spot, thereby obtaining the strain value and the stress value.
Referring to fig. 1-8, a conical spring 508 is arranged between the probe and the mounting seat 505, the conical spring 508 is mounted on the mounting seat 505, one end acts on the mounting seat 505, and the other end acts on the probe; the spring force of the conical spring 508 urges the probe to return; when the feeding driving mechanism 503 drives the detecting mechanism to reset, the probe is separated from the rubber vibration isolation support, and the probe can reset under the elasticity of the conical spring 508.
Referring to fig. 1-8, the probe comprises a needle 506 and a flexible rod 507 connected with the needle 506, wherein the head end of the flexible rod 507 is connected with the ball bearing 510, and the tail end is connected with the needle 506. Through setting up above-mentioned structure for the probe in every group detection mechanism all can elastic compaction be in on the rubber vibration isolation support, works as after the rubber vibration isolation support takes place inhomogeneous deformation, the probe in every group detection mechanism still can elastic compaction be in on the corresponding position of rubber vibration isolation support (this position is unanimous with the initial position), and take place to rotate under the deformation of rubber vibration isolation support, so that the laser transmitter 509 that is connected with this probe can synchronous reverse swing, makes the position of the laser spot after the change can be gathered to image acquisition device.
Referring to fig. 8, the resilient telescoping rod 507 may also be part of the probe.
Referring to fig. 1-8, the stress calculating device includes a receiving plate 504 disposed on a support 501, an image acquisition device (e.g., a camera 502) for acquiring laser light spots in the receiving plate 504, and an image processing device (e.g., a computer), wherein the receiving plate 504 faces an emission port of a laser emitter 509 of a plurality of sets of detection mechanisms; the image acquisition device calculates a strain value of a position corresponding to the detection mechanism in the rubber vibration isolation support through the position deviation of the laser light points projected onto the receiving plate 504 by each group of laser transmitters 509 before and after deformation, and calculates the stress value of the position according to the strain value.
Referring to fig. 1-8, the force application device comprises a vertical force application mechanism 6 and a horizontal force application mechanism 7, wherein the vertical force application mechanism 6 is installed above the bracket 4 and comprises a plurality of groups of first vertical force application cylinders which are arranged in a circumference equal angle manner and a second vertical force application cylinder which is arranged in the center of the plurality of groups of first vertical force application cylinders which are arranged in a circumference equal angle manner; the horizontal force application mechanism 7 comprises two groups of horizontal force application cylinders, the two groups of horizontal force application cylinders are arranged on two sides of the rubber vibration isolation support, a piston rod of each horizontal force application cylinder is connected with the upper end of the rubber vibration isolation support, and the connection of the horizontal force application cylinders belongs to movable connection. Through the arrangement, different acting forces can be applied to the rubber vibration isolation support, for example, pulling force and pushing force are respectively applied to the upper side of the rubber vibration isolation support through two groups of horizontal force application cylinders, so that the rubber vibration isolation support is twisted; the first vertical force application cylinder and the second vertical force application cylinder of the plurality of groups can apply downward pressure to the rubber vibration isolation support, and the magnitude of the downward pressure of the first vertical force application cylinder or/and the second vertical force application cylinder of each group is changed, so that a tipping moment is generated on the rubber vibration isolation support, and the vibration isolation support 501 is tipped.
Referring to fig. 1-8, the force application device further includes a fixing mechanism 8 for fixing the lower side of the rubber vibration isolation support, wherein the fixing mechanisms 8 are multiple groups, and the multiple groups of fixing mechanisms 8 are arranged at equal angles along the circumferential direction of the rubber vibration isolation support; each group of fixing mechanisms 8 comprises a fixing piece, one end of the fixing piece is connected with the bracket 4, and the other end of the fixing piece is connected with the lower side of the rubber vibration isolation support, wherein the fixing piece comprises a lantern ring and two groups of locking screws, and the two groups of locking screws are respectively arranged on the bracket 4 and the rubber vibration isolation support; two ends of the lantern ring are respectively sleeved on the two groups of locking screws; when the deformation of each position of the rubber vibration isolation support in torsional deformation is measured, the pulling direction of the lantern ring to the rubber vibration isolation support is opposite to the torque direction received by the rubber vibration isolation support, so that the lower side of the rubber vibration isolation support is prevented from rotating, and the rubber vibration isolation support can be subjected to torsional deformation.
Referring to fig. 1-8, the conveying device comprises a horizontal conveying mechanism 2 and a vertical lifting mechanism 3, wherein the bracket 4 has a double-layer structure, and the force application device and the detection device 5 are positioned on the upper layer of the bracket 4; the horizontal conveying mechanism 2 is arranged at the lower layer of the support 4, and the vertical lifting mechanism 3 is used for transferring the rubber vibration isolation support in the horizontal conveying mechanism 2 to a detection station at the upper layer of the support 4.
Referring to fig. 1-8, the horizontal conveying mechanism 2 comprises two groups of conveying rollers, wherein the two groups of conveying rollers are arranged in parallel, and each group of conveying rollers comprises a plurality of conveying rollers; in this embodiment, the two sets of conveying rollers may be driven by one set of power means, or by two sets of power means, respectively.
Referring to fig. 1-8, the vertical lifting mechanism 3 comprises a supporting plate, a vertical driving mechanism for driving the supporting plate to move vertically, and a vertical guiding mechanism for guiding the vertical movement of the supporting plate vertically, wherein the vertical driving mechanism comprises a vertical cylinder arranged on the workbench 1; the vertical guide mechanisms are multiple groups, and each group can adopt a guide mode that a guide rod is matched with a guide sleeve/a guide hole (arranged on the supporting plate).
Referring to fig. 1 to 8, the stress detection method for the rubber vibration isolation mount of the present invention comprises the steps of:
s1, conveying a rubber vibration isolation support to be detected to a detection station by a conveying device;
s2, the feeding driving mechanism 503 drives the mounting seat 505 and a plurality of groups of detection mechanisms arranged on the mounting seat 505 to move, so that probes in the plurality of groups of detection mechanisms are simultaneously in elastic contact with the outer side surface of the rubber vibration isolation support;
s3, starting the image acquisition device and the laser transmitters 509 in each group of detection mechanisms, so that the laser transmitters 509 project laser spots on the receiving plate 504; the image acquisition device acquires the positions of laser spots projected onto the receiving plate 504 by the laser transmitters 509 in the detection mechanisms of the rubber vibration isolation support in a normal state;
s4, the force application device applies force to the rubber vibration isolation support in the detection station, so that the rubber vibration isolation support deforms in different types, the probe is driven to swing while the rubber vibration isolation support deforms in the process, the laser transmitter 509 is driven to swing in the opposite direction in the process of swinging the probe, and the position of a laser spot projected onto the receiving plate 504 by the laser transmitter 509 is changed accordingly; the image acquisition device acquires the positions of laser spots projected onto the receiving plate 504 by the laser transmitters 509 in the detection mechanisms at the moment;
s5, the image processing device processes the images of the front and rear two times, compares the positions of laser light spots projected to the receiving plate 504 by the laser transmitters 509 in the same detection mechanism, converts the positions into strain values of the positions corresponding to the detection mechanism in the rubber vibration isolation support, combines the elastic modulus of the rubber layer in the rubber vibration isolation support, and calculates the stress values of the positions according to the relation between the strain and the stress, so as to obtain the stress values of the positions of the rubber vibration isolation support in different types of deformation.
In step (5), when detecting the same type of strain, the step S4 may be repeated a plurality of times, and the average value may be obtained after a plurality of times of strain values are calculated.
The stress detection method for the rubber vibration isolation support of the invention is described below in connection with the case where the rubber vibration isolation support is subjected to torsional deformation:
as shown in fig. 9, the contact position of the rubber vibration isolation support and the probe is C, and after the rubber vibration isolation support is torsionally deformed, the contact position of the probe is D; since the position (i.e. O point) of the ball bearing is fixed and L1 is the distance from the ball bearing to the receiving plate at the initial moment, the length of L1 can be measured; the point A is the position of the laser light spot after deformation, the point B is the position of the laser light spot before deformation, the actual distance L3 between the two points A, B is obtained through an image processing technology, and the point OB is perpendicular to the receiving plate, so that in a right-angle triangle OAB, the length of L2 can be obtained through a trigonometric function or Pythagorean theorem, and the magnitude of angle a is obtained; since = a = b, the magnitude of = b can also be calculated; because the OC is the distance from the ball bearing to the end of the probe, this is also a known quantity; od=oc+Δx, where Δx is the probe's varying travel, if its extension or retraction distance can be detected by a sensor disposed within the elastic telescoping rod of the probe; in the triangle OCD, the length of OC and OD and the included angle b of the OC and OD are known, so that the length of CD can be obtained; because FC and FD are radii R of the rubber layers and are known amounts, in an isosceles triangle FCD, the magnitude of +.c can be found from the trigonometric function, and +.c is φ (in degrees); therefore, the arc length between the two points of C, D is pi R phi/180, wherein R is the radius of the rubber layer of the vibration isolation rubber support; the arc length of the two points CD is the deformation of the point C in torsional deformation, and the strain value is obtained according to the deformation; and then obtaining the stress value at the C point according to the stress=elastic modulus.
The foregoing is illustrative of the present invention and is not to be construed as limiting thereof, but rather as various changes, modifications, substitutions, combinations, and simplifications which may be made therein without departing from the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (9)
1. A stress detection system for a rubber vibration isolation support is characterized by comprising a workbench, a conveying device, a force application device and a detection device, wherein the conveying device is arranged on the workbench and used for conveying the rubber vibration isolation support to a detection station, the force application device is used for applying torsion acting force to the rubber vibration isolation support positioned on the detection station so as to enable the rubber vibration isolation support to generate torsion deformation, the detection device is used for detecting the deformation of each position of the rubber vibration isolation support positioned on the detection station in the torsion deformation,
the detection device comprises a bracket and a plurality of groups of detection modules arranged on the bracket, wherein the plurality of groups of detection modules are arranged at equal angles along the circumferential direction of the detection station, each group of detection modules comprises a support, a plurality of groups of detection mechanisms arranged on the support, a feeding driving mechanism for driving the detection mechanisms to move along the radial direction of the rubber vibration isolation support and a stress calculation device,
the multiple groups of detection mechanisms are vertically arranged on the mounting seat; the feeding driving mechanism is used for driving the mounting seat to move; each group of detection mechanism comprises a probe, a laser emitter arranged at the tail end of the probe and a ball bearing arranged between the probe and the laser emitter, wherein the probe and the laser emitter are arranged at two opposite sides of the ball bearing, and the ball bearing is arranged on the mounting seat; the emission port of the laser emitter is away from the rubber vibration isolation support;
the stress calculation device comprises a receiving plate arranged on a support, an image acquisition device for acquiring laser light spots in the receiving plate and an image processing device, wherein the receiving plate is opposite to an emitting port of a laser emitter of the multiple groups of detection mechanisms; the image processing device is used for calculating the position deviation of the laser light points projected onto the receiving plate by each group of laser transmitters before and after deformation, converting the position deviation into a strain value of the position corresponding to the detection mechanism in the rubber vibration isolation support, and calculating a stress value of the position according to the relation between strain and stress;
the force application device is a horizontal force application mechanism; the horizontal force application mechanism comprises two groups of horizontal force application cylinders which are arranged on two sides of the rubber vibration isolation support, and a piston rod of the horizontal force application cylinder is connected with the upper end of the rubber vibration isolation support; and the two groups of horizontal force application cylinders respectively apply tension and thrust to the upper side of the rubber vibration isolation support, so that the rubber vibration isolation support is twisted.
2. The stress detection system for a rubber vibration isolation mount according to claim 1, wherein the force application device further comprises a plurality of sets of fixing mechanisms for fixing the lower side of the rubber vibration isolation mount, the plurality of sets of fixing mechanisms being arranged at equal angles along the circumferential direction of the rubber vibration isolation mount; each group of fixing mechanism comprises a fixing piece, one end of the fixing piece is connected with the bracket, and the other end of the fixing piece is connected with the lower side of the rubber vibration isolation support.
3. The stress detection system for a rubber vibration isolation mount of claim 2, wherein the mount comprises a collar and two sets of locking screws, wherein the two sets of locking screws are mounted on the bracket and the rubber vibration isolation mount, respectively; two ends of the lantern ring are respectively sleeved on the two groups of locking screws; the direction of the pulling force of the lantern ring on the rubber vibration isolation support is opposite to the direction of the torque received by the rubber vibration isolation support.
4. The stress detection system for a rubber vibration isolation mount according to claim 1, wherein a conical spring is provided between the probe and the mount, the conical spring being mounted on the mount with one end acting on the mount and the other end acting on the probe; the elastic force of the conical spring promotes the probe to reset.
5. The stress detection system for a rubber vibration isolation mount of claim 1, wherein the probe comprises a needle and an elastically telescoping rod connected to the needle, wherein a head end of the elastically telescoping rod is connected to the ball bearing and a tail end is connected to the needle.
6. The stress detection system for a rubber vibration isolation mount according to claim 1, wherein the conveying device comprises a horizontal conveying mechanism and a vertical lifting mechanism, wherein the bracket is of a double-layer structure, and the force application device and the detection device are positioned on the upper layer of the bracket; the horizontal conveying mechanism is arranged on the lower layer of the support, and the vertical lifting mechanism is used for transferring the rubber vibration isolation support in the horizontal conveying mechanism to the detection station on the upper layer of the support.
7. The stress detection system for a rubber vibration isolation mount of claim 1, wherein the image acquisition device is a camera.
8. A stress detection method applied to the stress detection system for a rubber vibration isolation mount according to any one of claims 1 to 7, characterized by comprising the steps of:
s1, conveying a rubber vibration isolation support to be detected to a detection station by a conveying device;
s2, the feeding driving mechanism drives the mounting seat and a plurality of groups of detection mechanisms arranged on the mounting seat to move, so that probes in the plurality of groups of detection mechanisms are simultaneously in elastic contact with the outer side surface of the rubber vibration isolation support;
s3, starting the image acquisition device and the laser transmitters in each group of detection mechanisms, so that the laser transmitters project laser light spots on the receiving plate; the image acquisition device acquires the positions of laser light spots projected onto the receiving plate by the laser transmitters in the detection mechanisms of the rubber vibration isolation support in a normal state;
s4, applying torsion acting force to the rubber vibration isolation support in the detection station by the force application device, so that the rubber vibration isolation support is subjected to torsion deformation, in the process, the rubber vibration isolation support is deformed and drives the probe to swing, in the process of swinging the probe, the laser transmitter is driven to swing in the opposite direction, and the position of a laser spot projected onto the receiving plate by the laser transmitter is changed; the image acquisition device acquires the positions of laser light spots projected onto the receiving plate by the laser transmitters in the detection mechanisms at the moment;
s5, the image processing device processes the images of the front and rear two times, compares the positions of laser spots projected to the receiving plate by the laser transmitters in the same detection mechanism, converts the positions into strain values of the positions corresponding to the detection mechanism in the rubber vibration isolation support, combines the elastic modulus of the rubber layer in the rubber vibration isolation support, and calculates stress values of the positions according to the relation between strain and stress.
9. The method according to claim 8, wherein in step S5, when detecting the same type of deformation, the step S4 is repeated a plurality of times, and after the strain values are calculated a plurality of times, the strain values are averaged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211238459.6A CN115307802B (en) | 2022-10-11 | 2022-10-11 | Stress detection system and method for rubber vibration isolation support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211238459.6A CN115307802B (en) | 2022-10-11 | 2022-10-11 | Stress detection system and method for rubber vibration isolation support |
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