CN114088556B - Sealing element testing device - Google Patents
Sealing element testing device Download PDFInfo
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- CN114088556B CN114088556B CN202111282930.7A CN202111282930A CN114088556B CN 114088556 B CN114088556 B CN 114088556B CN 202111282930 A CN202111282930 A CN 202111282930A CN 114088556 B CN114088556 B CN 114088556B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/40—Investigating hardness or rebound hardness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/005—Sealing rings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording means
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Abstract
The embodiment of the disclosure belongs to the technical field of sealing element testing, and particularly relates to a sealing element testing device. Embodiments of the present disclosure aim to solve the problem of inaccurate acquisition of the indentation formation process on a seal in the related art. The sealing element testing device comprises a displacement structure for installing the sealing element and the sealing matching element, wherein the displacement structure can drive the sealing element and the sealing matching element to repeatedly contact and separate, and the repeated contact and separation process of the sealing element and the sealing matching element when a workpiece is repeatedly opened and closed is simulated; the image acquisition equipment arranged on the displacement structure can acquire images of the sealing element and the sealing matching element in contact and separation in real time, and the forming process of the surface indentation of the sealing element under different preset conditions is tested.
Description
Technical Field
The embodiment of the disclosure relates to the technical field of sealing element testing, in particular to a sealing element testing device.
Background
Sealing elements such as rubber for sealing the valve, a buffer pad on the door, a sealing pad of a cup cover of the vacuum cup, a sealing core of a ball charging connector and the like are all soft materials, and are matched with a harder sealing matching element for sealing. After a period of use, the location where the seal contacts the seal mating member may form an indentation.
In the related art, the seal member and the seal mating member are generally detached from the corresponding devices, and the indentations on the seal member are observed through a microscope to obtain the forming process and forming mechanism of the indentations. However, analysis of the formation process and mechanism of the obtained indentations by removing the seal and seal mating member from the apparatus results in inaccuracy of the obtained indentation formation process and mechanism.
Disclosure of Invention
Embodiments of the present disclosure provide a sealing member testing device to solve the problem of inaccurate acquisition of an indentation forming process on a sealing member.
In one aspect, embodiments of the present disclosure provide a seal testing apparatus, comprising: a displacement structure for mounting a seal and a seal mating member, the displacement structure for driving the seal and the seal mating member to repeatedly contact and separate; and the image acquisition equipment is arranged on the displacement structure and is opposite to the contact area of the sealing element and the sealing matching element, and is used for acquiring images when the sealing element and the sealing matching element are contacted and separated.
Through the above-mentioned setting simulation work piece when opening and close repeatedly the process that sealing member and sealing mating member contacted and separated repeatedly, obtain the image when sealing member and sealing mating member contacted and separated simultaneously in real time, test the formation process of sealing member surface indentation under the different preset conditions.
In some embodiments, which may include the above embodiments, the displacement structure includes a fixed seat, a displacement frame, and a driving device; the displacement frame is arranged at the upper part of the fixed seat, and the sealing matching piece is arranged on the fixed seat; the displacement frame comprises a frame body and a mounting plate arranged on the frame body, wherein the mounting plate is perpendicular to the relative movement direction of the sealing element and the sealing matching element, and the sealing element is arranged on the mounting plate; the driving device is connected with the frame body and the fixing seat, and is used for driving the frame body to move relative to the fixing seat.
In some embodiments, which may include the above embodiments, a mounting window is provided on the mounting plate, a transparent plate is provided in the mounting window, and the sealing member is configured to be disposed on the transparent plate; the image acquisition equipment is arranged on one side, away from the fixed seat, of the mounting plate, and is connected with the frame body, and the image acquisition equipment is opposite to the mounting window.
In some embodiments, which may include the foregoing embodiments, a bottom end of the frame facing away from the fixing base has a fixing beam extending in a direction parallel to the mounting plate, and the image capturing device is connected to the fixing beam through a first adjusting device, where the first adjusting device is used to adjust a relative position of the image capturing device and the mounting window.
In some embodiments, which may include the above embodiments, the fixing base includes a base plate, a second adjusting device provided on the base plate, and a supporting portion; the driving device is connected with the bottom plate, the supporting part is arranged on the second adjusting device, the sealing matching piece is arranged on the supporting part, and the second adjusting device is used for adjusting the relative position of the supporting part and the mounting window.
In some embodiments, which may include the above embodiments, the second adjustment device includes a first angular stage and a second angular stage; the first angular position table is arranged on the bottom plate, the second angular position table is arranged on the first angular position table, and the supporting part is arranged on the second angular position table; the rotation axes of the first angular position table and the second angular position table are vertical.
In some embodiments, which may include the above embodiments, the support portion is provided with a first direction detecting device, and the mounting plate is provided with a second direction detecting device.
In some embodiments, which may include the above embodiments, a pressure detecting device is provided on the support portion, and the pressure detecting device is connected to the seal mating member, and is configured to detect a pressure applied to the seal mating member.
In some embodiments, which may include the above embodiments, the support portion includes a support seat and a jack post; the supporting seat is connected with the bottom plate, a mounting hole perpendicular to the mounting plate is formed in the supporting seat, and the supporting column penetrates through the mounting hole; the top of supporting the footstock is used for installing sealing fit spare, pressure detection device sets up in the mounting hole, and is located support the lower part of jack-prop.
In some embodiments, which may include the above embodiments, a limiting mechanism is disposed between the abutment post and the wall of the mounting hole, the limiting mechanism being configured to cause a centerline of the abutment post to be collinear with a centerline of the mounting hole.
The sealing element testing device provided by the embodiment of the disclosure can drive the sealing element and the sealing matching element to repeatedly contact and separate, and simulate the repeated contact and separation process of the sealing element and the sealing matching element when the workpiece is repeatedly opened and closed; simultaneously, images of the contact and separation of the sealing element and the sealing matching element are obtained in real time, and the forming process of the surface indentation of the sealing element under different preset conditions is tested.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a schematic perspective view of a seal testing device according to an embodiment of the disclosure;
fig. 2 is a schematic perspective view of a second embodiment of a seal testing device according to the present disclosure;
FIG. 3 is a cross-sectional view of FIG. 2;
FIG. 4 is a schematic diagram of a seal and seal mating member installation of a seal testing apparatus provided by an embodiment of the present disclosure;
FIG. 5 is an enlarged view of a portion of the portion A of FIG. 3;
fig. 6 is a partial enlarged view of the portion B in fig. 3.
Reference numerals illustrate:
1: a displacement structure;
2: an image acquisition device;
3: a seal;
4: a seal fit;
5: a first direction detection device;
6: a second direction detecting device;
7: a pressure detection device;
11: a fixing seat;
12: a displacement frame;
13: a driving device;
41: a seal fitting lower portion;
42: an upper seal fitting portion;
111: a bottom plate;
112: a first adjusting device;
113: a support part;
114: a fixing plate;
121: a frame body;
122: a mounting plate;
123: a transparent plate;
124: mounting a beam;
125: a fixed beam;
126: first adjusting device
1121: a first angular stage;
1122: a second angular stage;
1123: a first base structure;
1124: a first angle adjustment structure;
1125: a first swing structure;
1131: a support base;
1132: a supporting column;
1133: a mounting hole;
1134: a mounting slot;
1135: a limiting mechanism;
1136: a first support base;
1137: a second support base;
1138: and a connection hole.
Specific embodiments of the present disclosure have been shown by way of the above drawings and will be described in more detail below. These drawings and the written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the disclosed concepts to those skilled in the art by reference to specific embodiments.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are some embodiments of the present disclosure, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without inventive effort, based on the embodiments in this disclosure are intended to be within the scope of this disclosure.
When the workpiece (such as a valve, a door, a cup cover of a vacuum cup, a ball charging connector and the like) is closed, the sealing matching piece is matched with the sealing piece to realize sealing, so that leakage of gas or liquid is avoided. Specifically, the sealing matching piece is in stress application process on the surface of the sealing piece, the sealing matching piece is in contact with the sealing piece, the surface of the sealing piece is extruded, and the surface of the sealing piece is elastically deformed; when the workpiece is opened, the sealing matching piece performs a stress release process on the surface of the sealing piece, the sealing matching piece and the sealing piece are separated from each other, and the surface of the sealing piece which is elastically deformed is restored to the initial state.
When the workpiece is repeatedly opened and closed, the sealing matching piece applies repeated stress and releases the stress on the surface of the sealing piece, the contact area between the sealing matching piece and the sealing piece is smaller, the pressure of the sealing matching piece acting on the surface of the sealing piece is larger, and in the process of applying the repeated stress and releasing the stress, if the surrounding environment of the workpiece changes, or the workpiece changes, the contact between the sealing matching piece and the sealing piece can be influenced, so that the surface of the sealing piece is locally plastically deformed, and an indentation is formed.
Illustratively, when the sealing element is contacted with the sealing matching element due to the change of the temperature of the workpiece, the change of the fluid state in the workpiece, the change of the surrounding working condition and the like, the sealing element and the sealing matching element generate force transient unbalance, so that the sealing matching element or the sealing element generates tiny displacement, and the accumulated tiny displacement can bring about fretting wear, so that the surface of the sealing element generates indentation.
For other examples, in order to avoid the phenomenon that the workpiece is blocked in the repeated opening and closing process, the fit clearance between the workpiece and the guide mechanism is usually designed to be larger, so that the workpiece is easy to be subjected to unbalanced stress in the moving process, the contact angle between the sealing fit piece and the sealing piece is caused to deflect, the contact area between the sealing fit piece and the sealing piece after the angle deflection is smaller than that under the normal condition, the contact stress is more concentrated, and the sealing piece is easier to be subjected to local plastic deformation to form indentations. The deflection direction and the deflection size of the contact angle are random, and when the workpiece is closed next time, the position of the indentation is changed due to uncontrollable deflection angle, so that a typical double eyelid effect in engineering is formed, and the sealing performance is affected.
In the related art, the seal member and the seal mating member are generally detached from the corresponding devices, and the indentations on the seal member are observed through a microscope to obtain the forming process and forming mechanism of the indentations. However, when the indentation on the surface of the sealing member is observed by a microscope, only the shape and depth of the indentation finally formed on the surface of the sealing member can be obtained, and the formation process of the indentation cannot be detected, and it is not known how the indentation is generated and erased. Meanwhile, the indentation on the surface of the sealing element is the result of superposition of the indentations after the workpiece is opened and closed for many times, and the formation process of each single indentation cannot be known when a microscope observes, so that the obtained indentation formation process and mechanism are inaccurate.
The embodiment of the disclosure provides a sealing element testing device, which comprises a displacement structure for installing a sealing element and a sealing matching element, wherein the displacement structure can drive the sealing element and the sealing matching element to repeatedly contact and separate, and is used for simulating the repeated contact and separation process of the sealing element and the sealing matching element when a workpiece is repeatedly opened and closed; the displacement structure is also provided with image acquisition equipment, and the image acquisition equipment is opposite to the contact area of the sealing element and the sealing matching element; the image acquisition equipment can acquire images when the sealing element and the sealing matching element are contacted and separated so as to detect the contact process between the sealing element and the sealing matching element in real time, and further improve the accuracy of the obtained indentation forming process and mechanism. In addition, the image acquisition device can acquire images of each contact and separation of the sealing element and the sealing matching element, and can detect the single contact of the sealing element and the sealing matching element, so that the accuracy of the obtained indentation forming process and mechanism is further improved.
Referring to fig. 1, a seal testing apparatus provided in an embodiment of the disclosure includes: a displacement structure 1, wherein the displacement structure 1 is used for installing the sealing element 3 and the sealing matching element 4, and the displacement structure 1 can drive the sealing element 3 and the sealing matching element 4 to repeatedly contact and separate; the device also comprises an image acquisition device 2, wherein the image acquisition device 2 is arranged on the displacement structure 1, and the image acquisition device 2 is opposite to the contact area of the sealing element 3 and the sealing matching element 4 and is used for acquiring images when the sealing element 3 and the sealing matching element 4 are contacted and separated.
The displacement structure 1 can be formed by a mounting beam and a driving component, the driving component is connected with the mounting beam, the driving component can drive the mounting beam to move, the mounting beam is used for mounting the sealing element 3 and the sealing matching element 4, and when the driving component drives the mounting beam to move, the mounting beam drives the sealing element 3 and the sealing matching element 4 to repeatedly contact and separate. The mounting beam may comprise a fixed cross beam and a movable vertical beam which are arranged vertically to each other, the sealing element 3 is fixedly mounted on the fixed cross beam, one end of the movable vertical beam is connected with the driving assembly, the other end of the movable vertical beam is used for mounting the sealing element 4, and the driving assembly drives the movable vertical beam to move towards a direction approaching to the fixed cross beam, so that the sealing element 4 is in contact with the sealing element 3; or the drive assembly drives the moving vertical beam to move away from the fixed cross beam so that the sealing engagement 4 is separated from the sealing element 3. The opposite position of the sealing element 3 of the fixed cross beam is also provided with a fixed bracket, and the image acquisition equipment 2 is arranged on the fixed bracket and is used for acquiring images when the sealing element 3 is contacted with and separated from the sealing matching element 4.
The mounting beam may further comprise a first mounting beam and a second mounting beam arranged opposite to each other, the driving assembly comprises a first driving assembly and a second driving assembly, the first mounting beam is connected with the first driving assembly, and the second mounting beam is connected with the second driving assembly; the sealing element 3 is fixed on the first mounting beam, the sealing matching element 4 is fixed on the second mounting beam, the first driving assembly drives the first mounting beam to move towards the direction close to the second mounting beam, and the second driving assembly drives the second mounting beam to move towards the direction close to the first mounting beam, so that the first mounting beam and the second mounting beam are close to each other, and the sealing element 3 and the sealing matching element 4 can be contacted; or the first driving component drives the first mounting beam to move towards a direction away from the second mounting beam, and the second driving component drives the second mounting beam to move towards a direction away from the first mounting beam, so that the first mounting beam and the second mounting beam are away from each other, and the sealing element 3 and the sealing matching element 4 can be separated. The mounting beam may further include a fixing beam, two ends of the fixing beam are used for connecting the first mounting beam and the second mounting beam, and a fixing bracket is further arranged on the fixing beam, the image acquisition device 2 is installed on the fixing bracket, and is opposite to the contact area of the sealing element 3 and the sealing matching element 4, and is used for acquiring images when the sealing element 3 and the sealing matching element 4 are contacted and separated.
Therefore, the sealing element testing device disclosed by the embodiment of the disclosure drives the sealing element and the sealing matching element to repeatedly contact and separate through the displacement structure, and simulates the process of repeatedly contacting and separating the sealing element and the sealing matching element when the workpiece is repeatedly opened and closed; and images when the sealing element and the sealing matching element are contacted and separated are acquired in real time through image acquisition equipment arranged on the displacement structure, and the forming process of the surface indentation of the sealing element under different preset conditions is tested, so that the single contact detection of the sealing element and the sealing matching element is realized. As shown in fig. 1, 2 and 3, the displacement structure 1 may include a fixed seat 11, a displacement frame 12 and a driving device 13; the displacement frame 12 is arranged at the upper part of the fixed seat 11, and the sealing matching piece 4 is arranged on the fixed seat 11; the displacement frame 12 includes a frame body 121 and a mounting plate 122 provided on the frame body 121, the mounting plate 122 being provided perpendicular to a relative movement direction (vertical direction in fig. 1 and 2) of the seal member 3 and the seal mating member 4, the seal member 3 being for being provided on the mounting plate 122; the driving device 13 is connected to the frame 121 and the fixed seat 11, and the driving device 13 is used for driving the frame 121 to move relative to the fixed seat 11.
Illustratively, in the orientations shown in fig. 1 and 2, the frame 121 may be at least two vertically disposed support beams, uniformly distributed on the upper portion of the fixing base 11, and disposed around the outer circumference of the fixing base 11. At this time, the mounting plate 122 is horizontally disposed, and one support beam is disposed at each corner of the mounting plate 122, and the sealing member 3 is disposed on the mounting plate 122. The frame 121 is driven by the driving device 13 to move in a vertical direction relative to the fixed seat 11, and meanwhile, the mounting plate 122 is driven to move relative to the fixed seat 11, and the mounting plate 122 drives the sealing element 3 to move relative to the fixed seat 11, so that the sealing element and the sealing matching element are contacted or separated.
As shown in fig. 1, the frame 121 includes four vertically disposed support beams, which are uniformly distributed on the upper portion of the fixing base 11 and are disposed around the outer circumference of the fixing base 11. The mounting plate 122 may be a rectangular plate, and is horizontally disposed, and four corners of the mounting plate 122 are correspondingly provided with a supporting beam, specifically, the four corners of the mounting plate 122 are embedded into notches formed on the four frame bodies 121, so that the mounting plate 122 is horizontally fixed.
For example, as shown in fig. 2, when the mounting plate 122 is a rectangular plate disposed horizontally, the frame body 121 further includes at least two mounting beams 124 disposed horizontally, the mounting beams 124 are disposed between two supporting beams disposed vertically, and two ends of the mounting beams 124 are respectively connected vertically to the two supporting beams disposed vertically. The two opposite sides of the mounting plate 122 are respectively erected on two oppositely arranged mounting beams 124, and the mounting beams 124 are used for supporting and fixing the mounting plate 122, so that the mounting plate 122 is kept horizontally fixed. Or two opposite sides of the mounting plate 122 are respectively inserted into the notches of two oppositely arranged mounting beams 124, and the mounting beams 124 are used for supporting and fixing the mounting plate 122 so that the mounting plate 122 is kept horizontally fixed.
When the frame 121 is driven by the driving device 13 to move in a direction away from the fixing seat 11 (in the orientation shown in fig. 2, the frame 121 drives the mounting plate 122 to move in a direction away from the fixing seat 11 (in the orientation shown in fig. 2, the mounting plate moves upward), and at this time, the sealing member 3 will be away from the sealing mating member 4. When the frame 121 is driven by the driving device 13 to move toward the direction approaching the fixing seat 11 (downward movement in the orientation shown in fig. 2), the frame 121 drives the mounting plate 122 to move toward the direction approaching the fixing seat 11 (downward movement in the orientation shown in fig. 2), and at this time, the sealing member 3 approaches and contacts the sealing mating member 4.
Therefore, the sealing element testing device of the embodiment of the disclosure installs the sealing matching element 4 through the fixed seat 11 of the displacement structure 1, installs the sealing element 3 through the displacement frame 12 arranged on the upper portion of the fixed seat 11, drives the frame body 121 of the displacement frame 12 to move relative to the fixed seat 11 through the driving device 13, so that the sealing element 3 and the sealing matching element 4 are repeatedly contacted and separated, and simulates the repeated contact and separation process of the sealing element 3 and the sealing matching element 4 when the workpiece is repeatedly opened and closed.
Referring to fig. 4, in the present embodiment, a mounting window is provided on the mounting plate 122, a transparent plate 123 is provided in the mounting window, and the sealing member 3 is configured to be disposed on the transparent plate 123; the image acquisition device 2 is arranged on one side of the mounting plate 122, which is away from the fixed seat 11, and the image acquisition device 2 is connected with the frame body 121, and the image acquisition device 2 is arranged opposite to the mounting window. The image pickup apparatus 2 photographs the sealing member 3 located on the transparent plate 123 through the transparent plate 123, so that the image pickup apparatus 2 can smoothly record the formation process of the impression on the sealing member 3.
For example, a through hole penetrating through the mounting plate 122 may be formed on the mounting plate 122 to form a mounting window, a transparent plate 123 matched with the mounting window is embedded in the through hole, and the transparent plate 123 is disposed near one side of the sealing matching piece 4; alternatively, a through hole penetrating through the mounting plate 122 may be formed on the mounting plate 122 to form a mounting window, the transparent plate 123 is laid at the position of the mounting window on the mounting plate 122 (the size of the mounting window is larger than that of the transparent plate 123 at this time), and the transparent plate 123 is disposed near one side of the fixed seal fitting 4.
Illustratively, through holes are formed in the sealing element 3 and the transparent plate 123, and when the transparent plate 123 is arranged in the mounting window, the connecting element sequentially passes through the through holes in the sealing element 3 and the transparent plate 123, so that the sealing element 3 is fixed on the transparent plate 123, and the sealing element 3 is ensured not to shake in the mounting window.
Therefore, the sealing element testing device of the embodiment of the disclosure installs the sealing element 3 through the mounting plate 122 on the displacement frame 12, and if the performance of the sealing element 3 with different shapes and different materials needs to be tested, the sealing element 3 is only required to be detached from the mounting window of the mounting plate 122 and then replaced, so that the operation is simple and convenient. And use mounting panel 122 as carrier support seal 3, compared with the scheme of directly installing seal 3 on displacement frame 12, safe and reliable can not destroy seal 3 self when simulating seal 3's sealing performance. Meanwhile, the image acquisition device 2 is opposite to a mounting window on the mounting plate 122, so that images of the sealing element and the sealing matching element when in contact and separation can be accurately acquired in real time.
The shape and thickness of the mounting plate 122, the transparent plate 123, and the sealing member 3 of the present embodiment are set according to the specific circumstances, and are not limited herein.
Referring to fig. 1, 2 and 3, in the present embodiment, a bottom end of the frame 121 facing away from the fixing base 11 has a fixing beam 125 extending along a direction parallel to the mounting plate 122, the image capturing device 2 is connected to the fixing beam 125 through a first adjusting device 126, and the first adjusting device 126 is used for adjusting a relative position of the image capturing device 2 and the mounting window 123.
Specifically, the first adjusting device 126 is used for installing the fixed image capturing device 2, and meanwhile, can also drive the image capturing device 2 to move so as to adjust the relative position of the image capturing device 2 and the installation window 123, so that the image capturing device 2 can capture images when the sealing element 3 and the sealing matching element 4 are contacted and separated under different orientations.
The first adjusting device 126 may be a ring-shaped bracket, and the outer periphery of the bracket extends with a buckle, and the buckle is clamped on the fixed beam 125, so that the image capturing apparatus 2 passes through the ring-shaped opening of the bracket, and the first adjusting device 126 is connected with the fixed beam 125. Wherein the fixed beam 125 is parallel to the mounting plate 122, and the fixed beam 125 may be a slide rail and the image acquisition device 2 may be a camera. The annular mouth of first adjusting device 126 is worn to establish by the camera's camera lens for the camera is installed on first adjusting device 126, and the buckle joint of first adjusting device 126 is on the slide rail, and with slide rail sliding connection, can drive the camera and slide preset distance on the slide rail, diversified record sealing member 3's state.
For example, in the orientations shown in fig. 1 and 2, the frame 121 may include four vertically disposed support beams, the mounting plate 122 is formed in a rectangular shape, horizontally disposed, and four corners of the mounting plate 122 are connected with the four frame 121, respectively. At this time, three fixing beams 125 may be included, and the three fixing beams 125 are all located at the same horizontal plane, wherein two fixing beams 125 are parallel to each other, and the two fixing beams 125 parallel to each other are used for being connected with the four frame bodies 121 as supporting beams; the two fixed beams 125 are connected by the remaining one fixed beam 125, the remaining one fixed beam 125 being used for mounting the first adjusting device 126, the first adjusting device 126 sliding along the remaining one fixed beam 125.
For example, five fixing beams 125 may be further included, where the five fixing beams 125 are all located on the same horizontal plane, and four fixing beams 125 are connected end to form a rectangular frame body, and the rectangular frame body is used to connect with four frame bodies 121 to serve as supporting beams; the remaining one fixed beam 125 is connected to the middle of the rectangular frame for mounting the first adjusting device 126, and the first adjusting device 126 slides along the remaining one fixed beam 125.
Therefore, the seal testing device of this embodiment installs the image capturing device 2 through the first adjusting device 126, the first adjusting device 126 is connected with the fixed beam 125 and can slide along the fixed beam 125, and the image capturing device 2 will be driven to slide along the fixed beam 125 when sliding along the fixed beam 125, so as to adjust the relative position of the image capturing device 2 and the installation window 123, so that the image capturing device 2 can not only monitor and record the repeated contact and separation process of the seal matching piece 4 and the seal piece 3 in real time, but also detect the formation process of the indentation on the seal piece 3 and the disappearance process of the indentation after the seal matching piece 4 and the seal piece 3 contact each other in real time. At the same time, it is ensured that the image acquisition apparatus 2 can monitor the state of the sealing area where the seal mating member 4 and the seal member 3 are in contact with each other in each direction.
Referring to fig. 1 and 2, in the present embodiment, the fixing base 11 includes a base 111, a second adjusting device 112 disposed on the base 111, and a supporting portion 113; the driving device 13 is connected to the base plate 111, the supporting part 113 is arranged on the second adjusting device 112, the sealing fitting 4 is arranged on the supporting part 113, and the second adjusting device 12 is used for adjusting the relative position of the supporting part 113 and the mounting window 123.
The base plate 111 is horizontally disposed and formed into a rectangular shape, and is used for supporting the second adjusting device 112 and the supporting portion 113, four corners of the base plate 111 are respectively connected with the driving devices 13, one ends of the four driving devices 13 far away from the base plate 111 are all connected with the frame body 121, and the four driving devices 13 jointly drive the frame body 121 to move relative to the base plate 111, so that the sealing member 3 on the mounting plate 122 is driven to move relative to the base plate 111. The driving device 13 may be a piezoelectric driver, which converts input electric energy into output mechanical energy by using the inverse piezoelectric effect of the piezoelectric ceramic material, so as to realize displacement driving. The driving device 13 may also be a multi-layer piezoelectric stack driver, mainly formed by stacking multiple layers of piezoelectric ceramic plates and electrode plates, where the multiple layers of piezoelectric ceramic plates form multiple micro-displacement output units, and the displacement deformation is large, the output force is large, so that nano-scale displacement driving can be realized, and in this embodiment, the micro-displacement (nano-scale) of the frame 121 can be ensured. For easy installation, the piezoelectric stack driver is fixed on the bottom plate 111, so that the displacement output end of the piezoelectric stack driver is connected with the frame 121, and when the displacement output end freely stretches and contracts, the frame 121 is driven to move.
Referring to fig. 1, 2, 3 and 5, in the present embodiment, the second adjusting device 12 is horizontally disposed on the bottom plate 111 for driving the supporting portion 113 to rotate by a predetermined angle, so as to adjust the position of the sealing fitting 4 relative to the mounting window 123.
Illustratively, the second adjustment device 112 includes a first angular stage 1121 and a second angular stage 1122; the first angular stage 1121 is provided on the base plate 111, the second angular stage 1122 is provided on the first angular stage 1121, and the support portion 113 is provided on the second angular stage 1122; the axes of rotation of the first angular stage 1121 and the second angular stage 1122 are perpendicular.
Wherein, the first angular platform 1121 drives the supporting portion 113 to swing a first preset angle on a first plane, and the second angular platform 1122 simultaneously drives the first angular platform 1121 and the supporting portion 113 to swing a second preset angle on a second plane; the first plane and the second plane are perpendicular to each other. When the second adjusting device 112 adjusts the position of the sealing fitting 4 relative to the mounting window 123, the second angular platform 1122 is kept to be inoperative, and the first angular platform 1121 is adjusted to swing, at this time, the first angular platform 1121 will drive the first angular platform 1121 and the supporting portion 113 to swing together; then, the first angular stage 1121 is kept inactive, and the second angular stage 1122 is adjusted, and at this time, the second angular stage 1122 drives the supporting portion 113 to swing.
Illustratively, as shown in fig. 5, the first angular stage 1121 includes: the first bottom structure 1123, the first angle adjusting structure 1124 and the first swinging structure 1125, wherein one side surface of the first bottom structure 1123 is arranged on the bottom plate 111, the other side surface of the first bottom structure 1123, which faces away from the bottom plate 111, is provided with an arc surface, the side wall of the arc surface is provided with scales, and the first swinging structure is matched with the arc surface and can swing back and forth on the arc surface; the first angle adjusting structure 1124 is connected with the first swinging structure 1125, and is used for controlling the swinging angle of the first swinging structure 1125 on the arc surface, and can observe the specific swinging angle according to the scale on the side wall of the arc surface during swinging. The second angular stage 1122 is identical to the first angular stage 1121 in structure and operation, and will not be described in detail herein.
The forming process of the surface indentations of the sealing element is different under different preset conditions, wherein the different preset conditions comprise: the environment (temperature, pressure) in which the seal and seal fit are located, the contact angle of the seal and seal fit, and the contact pressure of the seal and seal fit. In order to simulate the process of repeatedly contacting and separating the seal mating member 4 and the seal member 3 under different contact angles, the present embodiment adjusts the installation angle of the seal mating member 4 through the first angular position table 1121 and the second angular position table 1122, thereby changing the contact angle of the seal mating member 4 and the seal member 3 so that the seal mating member 4 and the seal member 3 can contact each other at any angle.
In the embodiment, in an initial state, the sealing element 3 is horizontally placed, the sealing matching element 4 is vertically placed, the sealing element and the sealing matching element are vertically contacted with each other, and an in-situ indentation is formed on the sealing element 3; when the stress between the workpieces is unbalanced, the contact angle between the sealing matching piece 4 and the sealing piece 3 is changed, and an off-position indentation is formed on the sealing piece 3. When the contact angle between the sealing matching piece 4 and the sealing piece 3 is continuously changed, the workpiece can form the indentations with different depths and different shapes on different positions of the sealing piece 3 each time, the subsequent indentations can also be formed on the existing indentations, and silver veins can be formed around the indentations after the operation is repeated.
In this embodiment, the included angle between the sealing matching piece 4 and the axis in the vertical direction is adjusted by the first angular table 1121 and the second angular table 1122, so that the sealing matching piece 4 is inclined, when the workpiece is repeatedly opened and closed, the condition that the contact angle between the sealing matching piece 4 and the sealing piece 3 is changed due to unbalanced stress is simulated, the difference between the in-situ indentation and the ex-situ indentation is observed, and meanwhile, the process of forming silver veins around the indentation is observed and recorded, so that support is provided for researching the cumulative superposition effect of the indentation.
Referring to fig. 2, 3, 5 and 6, in the present embodiment, the supporting portion 113 is provided with a first direction detecting device 5, and the first direction detecting device 5 is used for detecting an installation angle of the supporting portion 113 in real time; the mounting plate 122 is provided with a second direction detecting device 6, and the second direction detecting device 6 is used for detecting the inclination angle of the mounting plate 122 in real time.
The installation angle of the supporting portion 113 represents the installation angle of the sealing mating member 4, the inclination angle of the installation plate 122 represents the installation angle of the sealing member 3, and a person skilled in the art can know which angle the indentation state of the surface of the sealing member 3 is obtained under the contact of the first direction detecting device 5 and the second direction detecting device 6 according to the angle information fed back, and can also adjust the installation angle of the sealing mating member 4 and the installation angle of the sealing member 3 according to the feedback information, so as to simulate the formation process of the indentation under various contact angles.
As illustrated in fig. 2, 3 and 6, the second direction detecting device 6 is disposed at an arbitrary position on the mounting plate 122 and horizontally disposed on the mounting plate 122, and accurately obtains the mounting angle of the mounting plate 122 as the mounting plate 122 moves or swings. The supporting part 113 is connected with a fixed plate 114, and the fixed plate 114 is provided with the first direction detection device 5, so that the first direction detection device 5 can be supported and fixed, and the installation angle of the supporting part 113 can be accurately obtained when the first direction detection device 5 swings or moves along with the supporting part 113.
In the present embodiment, as shown in fig. 5 and 6, the support portion 113 is provided with a pressure detecting device 7, and the pressure detecting device 7 is connected to the seal mating member 4 for detecting the pressure to which the seal mating member 4 is subjected. The pressure detection device 7 can detect the contact pressure between the sealing matching piece 4 and the sealing piece 3 in real time, and a person skilled in the art can obtain the indentation state of the surface of the current sealing piece 3 according to the pressure information fed back by the pressure detection device 7 under the condition of how much pressure is contacted, and can also adjust the installation positions of the sealing matching piece 4 and the sealing piece 3 according to the feedback information, so as to simulate the formation process of the indentation under various contact pressures.
The first direction detecting device 5 and the second direction detecting device 6 may be direction sensors, for example, measure acceleration and gravity by sensing the magnitude of inertial force of an object in a certain direction, measure the magnitude of component force of an object in two directions orthogonal to gravity, thereby determining the angle of the object in the horizontal direction, and convert the direction signals into electrical signals. The pressure detection means 7 may be a pressure sensor by sensing a pressure signal and converting the pressure signal into an electrical signal. Specifically, the pressure sensor includes a sensing element, a conversion element and a measurement circuit, the sensing element is connected with the component to be measured (support portion 113), after the component to be measured (support portion 113) applies pressure to the sensing element, the conversion element converts the pressure of the sensing element into an electrical signal, and the electrical signal is output through the measurement circuit, so that the pressure received by the component to be measured (support portion 113) is obtained.
Referring to fig. 3, 4 and 5, in the present embodiment, the supporting portion 113 includes a supporting seat 1131 and a supporting post 1132; the supporting seat 1131 is connected with the bottom plate 111, the supporting seat 1131 is provided with a mounting hole 1133 vertical to the mounting plate 122, and the supporting column 1132 is penetrated in the mounting hole 1133; the top end of the abutment column 1132 is used for installing the sealing fitting 4, and the pressure detection device 7 is arranged in the installation hole 1133 and is positioned at the lower part of the abutment column 1132.
In the orientation shown in fig. 5, the pressure detecting device 7 is disposed at the bottom of the mounting hole 1133 in the support base 1131, the bottom end of the supporting column 1132 is disposed above the pressure detecting device 7, and the top end of the supporting column 1132 is used for mounting the sealing fitting 4. In this embodiment, the abutment 1132 is contacted with the pressure detecting device 7, and when the sealing member 3 and the sealing member 4 are contacted, the sealing member 4 transmits the contact pressure to the abutment 1132 and is received by the pressure detecting device 7 at the bottom end of the abutment 1132. Therefore, the support portion 113 of the present embodiment can not only mount the fixed seal mating member 4, but also accurately obtain the contact pressure between the seal member 3 and the seal mating member 4. Meanwhile, the shape of the sealing matching piece 4 is different from the material, the contact pressure between the sealing matching piece 4 and the sealing piece 3 is different, and when various different sealing matching pieces 4 need to be simulated, the sealing matching piece 4 only needs to be detached from the top end of the propping column 1132 and replaced.
Illustratively, as shown in FIG. 4, the top end of the abutment post 1132 is formed with a mounting slot 1134, the seal fit 4 includes an upper seal fit portion 42 and a lower seal fit portion 41, the lower seal fit portion 41 is disposed within the mounting slot 1134, and the upper seal fit portion 42 extends out of the mounting slot 1134 for contact with the seal 3.
Illustratively, as shown in FIG. 6, the support base 1131 includes: the first support seat 1136 and the second support seat 1137, the first support seat 1136 is connected with the bottom plate 111, the second support seat 1137 is arranged above the first support seat 1136, the first support seat 1136 and the second support seat 1137 are provided with connecting holes 1138, and the connecting piece sequentially passes through the connecting holes 1138 on the first support seat 1136 and the second support seat 1137, so that the first support seat 1136 and the second support seat 1137 can be detachably connected.
For the integrally formed support base 1131, when the pressure detection device 7 needs to be replaced, all components arranged on the support base 1131 need to be disassembled from top to bottom, but for the detachable support base 1131, the installation and replacement of the pressure detection device 7 can be performed only by disassembling the whole second support base 1137.
Referring to fig. 6, in the present embodiment, a limiting mechanism 1135 is disposed between the supporting column 1132 and the hole wall of the mounting hole 1133, and the limiting mechanism 1135 is used to make the center line of the supporting column 1132 and the center line of the mounting hole 1133 collinear.
For example, the limiting mechanism 1135 may be a fixing sleeve, which is fixedly sleeved in the mounting hole 1133 and is disposed around the outer periphery of the supporting column 1132, so as to limit the supporting column 1132, and ensure that the supporting column 1132 does not deviate in the mounting hole 1133.
For example, the limiting mechanism 1135 may be a plurality of vertically arranged balls, where the plurality of vertically arranged balls are disposed in the mounting hole 1133 and around the outer periphery of the supporting column 1132, so as to limit the supporting column 1132, and ensure that the supporting column 1132 does not deviate in the mounting hole 1133.
In an embodiment of the present disclosure, further includes: and a control unit.
The control unit is electrically connected to the driving device 13, and is configured to send a control signal to the driving device 13, and after receiving the control signal, the driving device 13 moves the driving frame 121 in a direction away from the bottom plate 111, or controls the driving device 13 to drive the driving frame 121 to move in a direction close to the bottom plate 111. When the driving device 13 drives the frame body 121 to move in a direction away from the bottom plate 111, the frame body 121 drives the mounting plate 122 to move in a direction away from the supporting portion 113, so that the sealing fitting 4 is separated from the sealing member 3; when the driving device 13 drives the frame body 121 to move toward the direction approaching the bottom plate 111, the frame body 121 will drive the mounting plate 122 to move toward the direction approaching the supporting portion 113, so that the seal mating member 4 and the seal member 3 are in contact with each other.
The control unit is electrically connected with the first direction detecting device 5, so as to receive the inclination angle of the supporting portion 113 in the vertical direction detected by the first direction detecting device 5 in real time, that is, receive the inclination angle of the sealing fitting 4 in the vertical direction detected by the first direction detecting device 5 in real time.
The control unit is electrically connected with the second direction detecting device 6, so as to receive the inclination angle of the mounting plate 122 in the horizontal direction detected by the second direction detecting device 6 in real time, that is, receive the inclination angle of the sealing member 3 in the horizontal direction detected by the second direction detecting device 6 in real time.
The control unit is electrically connected with the first angular platform 1121 and the second angular platform 1122 of the angle adjusting unit 2, and controls the first angular platform 1121 and the second angular platform 1122 according to the received inclination angle of the sealing member 3 in the horizontal direction, the inclination angle of the sealing member 4 in the vertical direction, and the actual simulation requirement, so as to further adjust the inclination angle of the sealing member 4 in the vertical direction. So that the testing device of the present embodiment can monitor the contact condition of the seal mating member 4 and the seal member 3 at various angles.
The control unit is electrically connected with the image acquisition device 2 and the first adjusting device 126 respectively, and can receive the indentation forming process and the indentation disappearing process of the sealing interface shot by the image acquisition device 2 in real time, and meanwhile, can control the first adjusting device 126 to move on the fixed beam 125, so that the image acquisition device 2 can shoot the sealing interface of each azimuth and each angle.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present disclosure, and not for limiting the same; although the present disclosure has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present disclosure.
Claims (6)
1. A seal testing apparatus, comprising:
a displacement structure for mounting a seal and a seal mating member, the displacement structure for driving the seal and the seal mating member to repeatedly contact and separate;
the image acquisition device is arranged on the displacement structure and is opposite to the contact area of the sealing element and the sealing matching element, and is used for acquiring images when the sealing element and the sealing matching element are contacted and separated;
the displacement structure comprises a fixed seat, a displacement frame and a driving device;
the displacement frame is arranged at the upper part of the fixed seat, and the sealing matching piece is arranged on the fixed seat;
the displacement frame comprises a frame body and a mounting plate arranged on the frame body, wherein the mounting plate is perpendicular to the relative movement direction of the sealing element and the sealing matching element, and the sealing element is arranged on the mounting plate;
the driving device is connected with the frame body and the fixed seat and is used for driving the frame body to move relative to the fixed seat;
the mounting plate is provided with a mounting window, a transparent plate is arranged in the mounting window, and the sealing element is arranged on the transparent plate; through holes are formed in the sealing piece and the transparent plate, and when the transparent plate is arranged in the mounting window, the connecting piece sequentially penetrates through the sealing piece and the transparent plate;
the image acquisition equipment is arranged on one side of the mounting plate, which is away from the fixed seat, and is connected with the frame body, and the image acquisition equipment is arranged opposite to the mounting window;
the fixing seat comprises a bottom plate, a second adjusting device and a supporting part, wherein the second adjusting device is arranged on the bottom plate;
the driving device is connected with the bottom plate, the supporting part is arranged on the second adjusting device, the sealing matching piece is arranged on the supporting part, and the second adjusting device is used for adjusting the relative position of the supporting part and the mounting window;
the second adjusting device comprises a first angular position table and a second angular position table;
the first angular position table is arranged on the bottom plate, the second angular position table is arranged on the first angular position table, and the supporting part is arranged on the second angular position table; the rotation axes of the first angular position table and the second angular position table are vertical; the first angular position table drives the supporting part to swing a first preset angle on a first plane, and the second angular position table simultaneously drives the first angular position table and the supporting part to swing a second preset angle on a second plane; the first plane and the second plane are perpendicular to each other;
the first angular platform comprises a first bottom structure, a first angle adjusting structure and a first swinging structure; one side surface of the first bottom structure is arranged on the bottom plate, an arc-shaped surface is formed on the other side surface of the first bottom structure, which faces away from the bottom plate, scales are arranged on the side wall of the arc-shaped surface, and the first swinging structure is matched with the arc-shaped surface; the first angle adjusting structure is connected with the first swinging structure, controls the swinging angle of the first swinging structure on the arc-shaped surface, and can observe the specific swinging angle according to scales on the side wall of the arc-shaped surface during swinging.
2. The seal testing apparatus of claim 1, wherein the seal testing apparatus comprises,
the bottom that the support body deviates from the fixing base has along being on a parallel with the fixed beam that the mounting panel direction extends, image acquisition equipment with the fixed beam is connected through a adjusting device, a adjusting device is used for adjusting image acquisition equipment with the relative position of installing window.
3. The seal testing apparatus of claim 1, wherein the seal testing apparatus comprises,
the support part is provided with a first direction detection device, and the mounting plate is provided with a second direction detection device.
4. A seal testing apparatus according to any one of claims 1 to 3,
the support part is provided with a pressure detection device, and the pressure detection device is connected with the sealing matching piece and is used for detecting the pressure born by the sealing matching piece.
5. The seal testing apparatus of claim 4, wherein the seal testing apparatus comprises a seal holder,
the supporting part comprises a supporting seat and a propping column;
the supporting seat is connected with the bottom plate, a mounting hole perpendicular to the mounting plate is formed in the supporting seat, and the supporting column penetrates through the mounting hole;
the top of the propping column is used for installing the sealing matching piece, and the pressure detection device is arranged in the installation hole and is positioned at the lower part of the propping column.
6. The seal testing apparatus of claim 5, wherein the seal testing apparatus comprises,
and a limiting mechanism is arranged between the propping column and the hole wall of the mounting hole and used for enabling the center line of the propping column to be collinear with the center line of the mounting hole.
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| CN202111282930.7A CN114088556B (en) | 2021-11-01 | 2021-11-01 | Sealing element testing device |
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| CN202111282930.7A CN114088556B (en) | 2021-11-01 | 2021-11-01 | Sealing element testing device |
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| CN114858572A (en) * | 2022-03-24 | 2022-08-05 | 中交第二航务工程局有限公司 | Universal type pipe sheet rubber sealing gasket sliding test device and method |
| CN116038292A (en) * | 2022-11-30 | 2023-05-02 | 上海航天控制技术研究所 | Control equipment and method for zero leakage of conical surface soft seal |
| CN115808269A (en) * | 2023-02-07 | 2023-03-17 | 西安空天引擎科技有限公司 | Valve sealing performance testing device and system |
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