CN115307802A - 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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- CN115307802A CN115307802A CN202211238459.6A CN202211238459A CN115307802A CN 115307802 A CN115307802 A CN 115307802A CN 202211238459 A CN202211238459 A CN 202211238459A CN 115307802 A CN115307802 A CN 115307802A
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- 238000002955 isolation Methods 0.000 title claims abstract description 149
- 238000001514 detection method Methods 0.000 title claims abstract description 116
- 238000000034 method Methods 0.000 title claims abstract description 9
- 230000007246 mechanism Effects 0.000 claims abstract description 110
- 239000000523 sample Substances 0.000 claims abstract description 54
- 238000012545 processing Methods 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
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- 230000008602 contraction Effects 0.000 description 1
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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 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 a detection station; probes in the multiple groups of detection mechanisms are 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 each laser emitter; the force application device promotes the rubber vibration isolation support to generate different types of deformation; when the rubber vibration isolation support deforms, the probe is driven to swing and the laser emitter is driven to swing in the opposite direction, and the position of a laser spot projected by the laser emitter is changed; and collecting the positions of the laser light spots projected by each laser emitter at the moment, comparing the positions of the laser light spots projected by the same laser emitters, and calculating the stress value of the position by combining the elastic modulus of the rubber layer in the rubber vibration isolation support so as to obtain the stress value of each position of the rubber vibration isolation support in the deformation of different types.
Description
Technical Field
The invention relates to a pressure detection system and a pressure detection method, in particular to a stress detection system and a stress detection method for a rubber vibration isolation support.
Background
The rubber vibration isolation support is a support component which is used for supporting the weight of a container or equipment and fixing the container or equipment at a certain position, is also used for bearing 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 deformations under receiving various effect, for example takes place vertical deformation under the load of upper portion load, can take place horizontal deformation under the effect of horizontal force, can take place torsional deformation under the effect of torsional moment, and can take place to overturn under the effect of moment of overturning. 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 effect of multiple acting forces, so that the rubber vibration isolation support can generate multiple different deformations in the use process; in order to prevent the rubber layer of the rubber vibration isolation support from being damaged due to excessive 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 the rubber vibration isolation support at each position under different deformations so as to obtain the stress value of the rubber vibration isolation support at each position under different deformations.
A second object of the present invention is to provide a stress detection method for the above stress detection system.
The technical scheme for solving the technical problems is as follows:
a stress detection system for a 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 promote the rubber vibration isolation support to generate different types of deformation, 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, wherein,
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 feed driving mechanism for driving the detection mechanisms to move along the radial direction of the rubber vibration isolation support and a stress calculation device, wherein,
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 mechanisms 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 on 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 deviated from the rubber vibration isolation support;
the stress calculation device comprises a receiving plate arranged on the support, an image acquisition device for acquiring laser light spots in the receiving plate and an image processing device, wherein the receiving plate is over against the transmitting openings of the laser transmitters of the multiple groups of detection mechanisms; the image processing device is used for calculating the position deviation of the laser light spots projected onto the receiving plate by each group of laser transmitters before and after deformation, converting the position deviation into the 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 the strain and the 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 circumferential equiangular 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 circumferential equiangular 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 each horizontal force application cylinder is connected with the upper end of the rubber vibration isolation support.
Preferably, the force application device further comprises a plurality of groups of fixing mechanisms for fixing the lower side of the rubber vibration isolation support, and 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 mechanisms comprises a fixing piece, one end of each fixing piece is connected with the support, and the other end of each 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 pulling force direction of the lantern ring to the rubber vibration isolation support is opposite to the torque direction of 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 urges 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 support is of a double-layer structure, and the force application device and the detection device are positioned on the upper layer of the support; the horizontal conveying mechanism is arranged on the lower layer of the support, and the vertical lifting mechanism is used for transferring a rubber vibration isolation support in the horizontal conveying mechanism to a detection station on the upper layer of the support.
Preferably, the image acquisition device is a camera.
A stress detection method for a rubber vibration isolation support comprises the following steps:
s1, conveying a rubber vibration isolation support to be detected to a detection station by a conveying device;
s2, the feed driving mechanism drives the mounting base and the plurality of groups of detection mechanisms arranged on the mounting base to move, so that probes in the plurality of groups of detection mechanisms are 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 spots onto a 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 an acting force on a rubber vibration isolation support positioned in a detection station by a force application device to enable the rubber vibration isolation support to deform in different types, driving the probe to swing while the rubber vibration isolation support deforms in the process, driving the laser transmitter to swing in the opposite direction while the probe swings, and changing the position of a laser spot projected onto a receiving plate by the laser transmitter; the image acquisition device acquires the positions of laser spots projected by the laser transmitters in the detection mechanisms onto the receiving plate at the moment;
and S5, processing the images of the front and the back by the image processing device, comparing the positions of the laser light spots projected to the receiving plate by the laser transmitters in the same detection mechanism, converting the positions into strain values of the positions corresponding to the detection mechanism in the rubber vibration isolation support, and calculating the stress values of the positions according to the relation between the strain and the stress by combining the elastic modulus of the rubber layer in the rubber vibration isolation support.
Preferably, in step (5), when the same type of strain is detected, step S4 is repeated a plurality of times, and after 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. the stress detection system for the rubber vibration isolation support drives the multiple groups of detection mechanisms to move radially through the feeding driving mechanism, 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, when the rubber vibration isolation support is unevenly deformed (such as twisted or tilted), the probes in each group of detection mechanisms can still be elastically pressed on the rubber vibration isolation support and rotate under the urging of the deformation force of the rubber vibration isolation support, so that the laser transmitter connected with the probes synchronously and reversely swings, and the image acquisition device can acquire the positions of changed laser spots through the receiving plate; the position of a laser spot projected to a receiving plate by a laser transmitter in the same detection mechanism under a normal state is compared by an image processing device, so that the deformation is calculated, the deformation is converted into a strain value of a 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 the strain and the stress by combining the elastic modulus of a rubber layer in the rubber vibration isolation support, so that the stress value of each position of the rubber vibration isolation support under the deformation of different types 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 and development 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 illustrating a stress detection system for a rubber vibration isolation mount according to the present invention.
Fig. 2-4 are three perspective views of the stress detection system for the rubber vibration isolation mount according to the present invention.
FIG. 5 is a front view of the stress sensing system for a rubber isolation mount of the present invention.
Fig. 6 is a schematic perspective view of the 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 the rubber vibration isolation mount of the present invention detecting the stress calculation of the vibration isolation rubber mount in torsional deformation.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the embodiments of the present invention are not limited thereto.
Referring to fig. 1-8, the stress detection system for the rubber vibration isolation support comprises a workbench 1, a conveying device arranged on the workbench 1 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 on the detection station to promote the rubber vibration isolation support to generate different types of deformation, and a detection device 5 used for detecting the deformation of the rubber vibration isolation support on the detection station at each position of the different types of deformation.
Referring to fig. 1 to 8, the detecting device 5 includes a support 4 and a plurality of sets of detecting modules disposed on the support 4, wherein the plurality of sets of detecting modules are arranged at equal angles along a circumferential direction of the detecting station, each set of detecting module includes a support 501, a plurality of sets 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, wherein the plurality of sets of detecting mechanisms are vertically arranged on a mounting seat 505; the feeding driving mechanism 503 is used for driving the mounting base 505 to move, the feeding driving mechanism 503 adopts a driving mode that a motor is combined with a screw rod transmission mechanism, and is configured with a plurality of groups of guiding mechanisms to improve the movement precision, wherein the guiding mechanism adopts a mode that a guiding rod is combined with a guiding block; the lead screw is driven to rotate by the motor, so that the mounting seat 505 connected with the lead screw nut is driven to move, and the probes in the multiple groups of detection mechanisms are in contact with the outer side surface of the rubber vibration isolation support; when the detection is completed, the feeding driving mechanism 503 can drive the multiple sets of detection mechanisms to reset.
Referring to fig. 1-8, each set of detection mechanisms includes a probe, a laser emitter 509 disposed at a tail end of the probe, and a ball bearing 510 disposed between the probe and the laser emitter 509, wherein the probe and the laser emitter 509 are mounted on opposite sides of the ball bearing 510, and the ball bearing 510 is mounted on the mounting seat 505; the emitting port of the laser emitter 509 faces away from the rubber vibration isolation bearing; by mounting the probe and the laser transmitter 509 on the ball bearing 510, the probe and the laser transmitter 509 can rotate synchronously and in multiple angles to adapt to the uneven deformation of the rubber vibration isolation support, and meanwhile, the distance between the starting position and the end position of the probe is equal to the distance between the starting position and the end position projected onto the receiving plate 504 by the laser transmitter 509, but the directions are opposite, and based on the principle, the deformation amount of the rubber vibration isolation support at the position can be determined by detecting the starting position and the end position of the laser spot, so that the strain value and the stress value can be obtained.
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, and one end of the conical spring 508 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 reset; 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 elastic force of the conical spring 508.
Referring to fig. 1 to 8, the probe comprises a needle 506 and an elastic telescopic rod 507 connected to the needle 506, wherein the head end of the elastic telescopic rod 507 is connected to the ball bearing 510, and the tail end is connected to the needle 506. By the arrangement of the structure, the probes in each group of detection mechanisms can be elastically pressed on the rubber vibration isolation support, and after the rubber vibration isolation support is unevenly deformed, the probes in each group of detection mechanisms can still be elastically pressed on the corresponding position (the position is consistent with the initial position) of the rubber vibration isolation support and rotate under the deformation of the rubber vibration isolation support, so that the laser transmitter 509 connected with the probes can synchronously and reversely swing, and the image acquisition device can acquire the position of the changed laser light spot.
Referring to fig. 8, the flexible telescoping shaft 507 may also be part of the probe.
Referring to fig. 1 to 8, the stress calculating device includes a receiving plate 504 disposed on a support 501, an image collecting device (e.g., a camera 502) for collecting laser light spots in the receiving plate 504, and an image processing device (e.g., a computer), wherein the receiving plate 504 faces the emitting ports of the laser emitters 509 of the multiple sets of detecting mechanisms; the image acquisition device calculates the strain value of the position corresponding to the detection mechanism in the rubber vibration isolation support through the position deviation of the laser light spot 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.
Referring to fig. 1 to 8, the force application device includes a vertical force application mechanism 6 and a horizontal force application mechanism 7, wherein the vertical force application mechanism 6 is installed above the support 4, and includes a plurality of groups of first vertical force application cylinders arranged at equal angles on the circumference and a second vertical force application cylinder arranged at the center of the plurality of groups of first vertical force application cylinders arranged at equal angles on the circumference; 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 belongs to movable connection. Through the arrangement, different acting forces can be applied to the rubber vibration isolation support, for example, the rubber vibration isolation support is twisted by applying pulling force and pushing force to the upper side of the rubber vibration isolation support through two groups of horizontal force application cylinders; the lower pressure can be applied to the rubber vibration isolation support through the first vertical force application cylinders and the second vertical force application cylinders of the multiple groups, and the lower pressure of each group of the first vertical force application cylinders or/and the second vertical force application cylinders is changed, so that the rubber vibration isolation support generates a tipping moment, and the vibration isolation support 501 is tipped.
Referring to fig. 1 to 8, the force application device further includes a plurality of fixing mechanisms 8 for fixing the lower side of the rubber vibration isolation support, the fixing mechanisms 8 are arranged in a plurality of groups, and the plurality of 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 support 4, the other end of the fixing piece is connected with the lower side of the rubber vibration isolation support, 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 support 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 amount 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 of 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 to 8, the conveying device includes a horizontal conveying mechanism 2 and a vertical lifting mechanism 3, wherein the support 4 is a double-layer structure, and the force application device and the detection device 5 are located on an upper layer of the support 4; the horizontal conveying mechanism 2 is arranged on 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 the detection station on the upper layer of the support 4.
Referring to fig. 1-8, the horizontal conveying mechanism 2 comprises two groups of conveying rollers, 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 conveyor rollers may be driven by one set of power means, or by two sets of power means, respectively.
Referring to fig. 1 to 8, the vertical lifting mechanism 3 includes 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 includes a vertical cylinder disposed on the working table 1; the vertical guide mechanisms are in a plurality of groups, and each group can adopt a guide mode that a guide rod is matched with a guide sleeve/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 includes the steps of:
s1, conveying a rubber vibration isolation support to be detected to a detection station by a conveying device;
s2, the feed 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 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 onto the receiving plate 504; the image acquisition device acquires the positions of laser light spots projected onto the receiving plate 504 by the laser transmitters 509 in all detection mechanisms of the rubber vibration isolation support in a normal state;
s4, applying an acting force on the rubber vibration isolation support positioned in the detection station by the force application device to enable the rubber vibration isolation support to deform in different types, driving the probe to swing while the rubber vibration isolation support deforms in the process, driving the laser transmitter 509 to swing in the opposite direction while the probe swings, and changing the position of a laser spot projected by the laser transmitter 509 onto 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 each detection mechanism at the moment;
and S5, processing the images of the front and the back twice by the image processing device, comparing the positions of the laser light spots projected to the receiving plate 504 by the laser transmitters 509 in the same detection mechanism, converting the positions into strain values of the positions corresponding to the detection mechanism in the rubber vibration isolation support, and calculating the stress values of the positions according to the relation between the strain and the stress by combining the elastic modulus of the rubber layers in the rubber vibration isolation support so as to obtain the stress values of the positions of the rubber vibration isolation support in the deformation with different types.
In step (5), when detecting the same type of deformation, step S4 may be repeated a plurality of times, and after calculating strain values a plurality of times, an average value may be obtained.
The following description is given to the stress detection method for the rubber vibration isolation support in combination with the case that the rubber vibration isolation support is subjected to torsional deformation:
as shown in fig. 9, the position where the rubber vibration isolation mount contacts the probe is C, and after the rubber vibration isolation mount is deformed in a torsional manner, the contact position of the probe is D; since the position (i.e., the point O) of the spherical bearing is fixed, and L1 is the distance from the spherical bearing to the receiving plate at the initial time, the length of L1 can be measured; the point A is the position of the deformed laser spot, the point B is the position of the laser spot before deformation, the actual distance L3 between the point A and the point B is obtained through an image processing technology, and the OB is vertical to the receiving plate, so that the length of L2 can be obtained through a trigonometric function or a pythagorean theorem in the right-angled triangle OAB, and the size of a & lt a is obtained; since = b, the size of =canalso be solved; since the distance of OC is the distance from the ball bearing to the probe tip, also a known quantity; the OD can detect the extension or contraction distance of the probe through a sensor arranged in an elastic telescopic rod of the probe, and then the OD = OC +. DELTA.X, wherein the Delta X is the change stroke of the probe; in the triangular OCD, the lengths of OC and OD and the included angle b between OC and OD are known, so that the length of CD can be obtained; since FC and FD are the radius R of the rubber layer and are known quantities, in the isosceles triangle FCD, the magnitude of ═ c can be found from the trigonometric function, and ≦ c is Φ (unit: degrees); therefore, the arc length between the points C and 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 of the CD is the deformation of the C point position in the torsional deformation, and a strain value is obtained according to the deformation; and then, according to the stress = elastic modulus strain, the stress value at the point C can be obtained.
The present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents and are included in the scope of the present invention.
Claims (10)
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 different acting forces to the rubber vibration isolation support positioned on the detection station so as to promote the rubber vibration isolation support to generate different types of 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 different types of deformation, and 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 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 feed driving mechanism for driving the detection mechanisms to move along the radial direction of the rubber vibration isolation support and a stress calculation device, wherein,
the multiple groups of detection mechanisms are vertically arranged on the mounting seat; the feed driving mechanism is used for driving the mounting seat to move; each group of detection mechanisms 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 on 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 deviated from the rubber vibration isolation support;
the stress calculation device comprises a receiving plate arranged on the support, an image acquisition device used for acquiring laser spots in the receiving plate and an image processing device, wherein the receiving plate is over against the emitting ports of the laser emitters of the multiple groups of detection mechanisms; the image processing device is used for calculating the position deviation of laser light spots projected onto the receiving plate by each group of laser transmitters before and after deformation, converting the position deviation into a strain value of a 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.
2. The stress detection system for a rubber vibration isolation bearing according to claim 1, wherein the force application device comprises a vertical force application mechanism and a horizontal force application mechanism, wherein the vertical force application mechanism is installed above the bracket and comprises a plurality of groups of first vertical force application cylinders which are arranged at equal angles in the circumferential direction and a second vertical force application cylinder which is arranged at the center of the plurality of groups of first vertical force application cylinders which are arranged at equal angles in the circumferential direction; 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 each horizontal force application cylinder is connected with the upper end of the rubber vibration isolation support.
3. The stress detection system for a rubber vibration isolation support according to claim 2, wherein the force applying device further comprises a plurality of sets of fixing mechanisms for fixing the lower side of the rubber vibration isolation support, and the plurality of sets of fixing mechanisms are arranged at equal angles along the circumferential direction of the rubber vibration isolation support; each group of fixing mechanisms comprises a fixing piece, one end of each fixing piece is connected with the support, and the other end of each fixing piece is connected with the lower side of the rubber vibration isolation support.
4. The stress detecting system for the rubber vibration isolation support according to claim 3, wherein the fixing member comprises a collar and two sets of locking screws, wherein the two sets of locking screws are respectively mounted on the support and the rubber vibration isolation support; two ends of the lantern ring are respectively sleeved on the two groups of locking screws; the pull direction of the lantern ring to the rubber vibration isolation support is opposite to the torque direction of the rubber vibration isolation support.
5. The stress-detecting system for a rubber vibration-isolating mount according to claim 1, wherein a conical spring is disposed between said probe and said mount, said conical spring being mounted on said mount and acting on said mount at one end and on said probe at the other end; the elastic force of the conical spring urges the probe to reset.
6. The stress-detecting system for a rubber vibration-isolating mount according to claim 1, wherein the probe includes a needle head and an elastic telescopic rod connected to the needle head, wherein the elastic telescopic rod is connected to the ball bearing at a head end and to the needle head at a tail end.
7. The stress detection system for the rubber vibration isolation mount according to claim 1, wherein the conveying device comprises a horizontal conveying mechanism and a vertical lifting mechanism, wherein the support has a double-layer structure, and the force application device and the detection device are located on an upper layer of the support; the horizontal conveying mechanism is arranged on the lower layer of the support, and the vertical lifting mechanism is used for transferring a rubber vibration isolation support in the horizontal conveying mechanism to a detection station on the upper layer of the support.
8. The system of claim 1, wherein the image capturing device is a camera.
9. A stress detection method applied to the stress detection system for the rubber vibration isolation mount according to any one of claims 1 to 8, 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 feed 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 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 spots onto a 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 an acting force to the rubber vibration isolation support in the detection station by a force application device to enable the rubber vibration isolation support to deform in different types, driving the probe to swing while the rubber vibration isolation support deforms in the process, driving the laser transmitter to swing in the opposite direction while the probe swings, and changing the position of a laser spot projected onto the receiving plate by the laser transmitter; the image acquisition device acquires the positions of laser spots projected by the laser transmitters in the detection mechanisms onto the receiving plate at the moment;
and S5, processing the images of the front and the back by the image processing device, comparing the positions of laser spots projected to the receiving plate by the laser transmitters in the same detection mechanism, converting the strain values into strain values of the positions corresponding to the detection mechanism in the rubber vibration isolation support, and calculating the stress values of the positions according to the relation between the strain and the stress by combining the elastic modulus of the rubber layer in the rubber vibration isolation support.
10. The method of claim 9, wherein in step S5, the step S4 is repeated a plurality of times while detecting the same type of deformation, and after calculating a plurality of strain values, the strain values are averaged.
Priority Applications (1)
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