CN116840195A - Dynamic transmittance test device for sealing ring of extrusion oil film damper based on machine vision - Google Patents
Dynamic transmittance test device for sealing ring of extrusion oil film damper based on machine vision Download PDFInfo
- Publication number
- CN116840195A CN116840195A CN202310564405.7A CN202310564405A CN116840195A CN 116840195 A CN116840195 A CN 116840195A CN 202310564405 A CN202310564405 A CN 202310564405A CN 116840195 A CN116840195 A CN 116840195A
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- China
- Prior art keywords
- sealing ring
- cylinder
- cylinder body
- machine vision
- oil film
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- 238000007789 sealing Methods 0.000 title claims abstract description 41
- 238000002834 transmittance Methods 0.000 title claims abstract description 22
- 238000001125 extrusion Methods 0.000 title claims abstract description 21
- 238000012360 testing method Methods 0.000 title claims abstract description 21
- 238000001514 detection method Methods 0.000 claims abstract description 24
- 230000005284 excitation Effects 0.000 claims abstract description 3
- 230000003746 surface roughness Effects 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 17
- 238000013016 damping Methods 0.000 description 4
- 230000008447 perception Effects 0.000 description 4
- 230000001629 suppression Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000004438 eyesight Effects 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000016776 visual perception Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/59—Transmissivity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
The invention provides a dynamic transmittance test device for an extrusion oil film damper sealing ring based on machine vision, which comprises a cylinder, a supporting boss arranged below the cylinder, a vibration exciter connected with the cylinder through a vibration excitation rod, and sealing pieces to be tested respectively arranged at two ports of the cylinder, wherein the upper surface and the lower surface of the cylinder are provided with shading plates, and a laser is arranged in the cylinder; the outside of barrel both ends are equipped with annular camera and image acquisition card respectively, and annular camera and image acquisition card are connected with the computer. The invention solves the problems of poor universality, lagging dynamic detection method, poor dynamic detection precision and the like of the existing detection device for the surface roughness and the light leakage degree of the sealing ring.
Description
Technical Field
The invention relates to the field of aeroengine part detection, in particular to a dynamic transmittance test device for an extrusion oil film damper sealing ring based on machine vision
Background
The squeeze film damper has been widely used in aircraft engines as an efficient passive vibration damping means. The piston ring is a sealing piece for guaranteeing the closing of the oil groove of the extrusion oil film damper, so that the lubricating oil leakage quantity of the extrusion oil film damper can be obviously reduced, and the vibration reduction and suppression performance of the extrusion oil film damper in the actual operation process can be improved.
The vibration damping performance of the extrusion oil film damper is closely related to the running stability of the whole aircraft engine, and the end sealing structure of the extrusion oil film damper is a key part for controlling the lubricating oil leakage quantity and the damping coefficient of the extrusion oil film damper. Modern aircraft engines often employ squeeze film dampers with piston ring seal designs to achieve more excellent damping. The whole size structure of the sealing ring has larger influence on the vibration reduction and suppression effect of the extrusion oil film damper, and the sealing ring is often in a dynamic rotation working environment, if the surface roughness cannot meet the requirements in the assembly and dynamic operation process of the piston ring, the vibration reduction and suppression effect of the extrusion oil film damper can be negatively influenced, and even the whole machine is unstable in work.
Disclosure of Invention
The invention aims to solve the problems of poor universality, lagging dynamic detection method, poor dynamic detection precision and the like of the existing detection device for the surface roughness and the light leakage of the sealing ring, and provides a device for testing the dynamic transmittance of the sealing ring of the extrusion oil film damper based on machine vision.
The purpose of the invention is realized in the following way: the laser comprises a cylinder body, a supporting boss arranged below the cylinder body, a vibration exciter connected with the cylinder body through a vibration excitation rod, and sealing pieces to be tested respectively arranged at two ports of the cylinder body, wherein the upper surface and the lower surface of the cylinder body are provided with light shielding plates, and a laser is arranged in the cylinder body; the outside of barrel both ends are equipped with annular camera and image acquisition card respectively, and annular camera and image acquisition card are connected with the computer.
1. The cylinder body is a cylindrical box body.
2. The laser is a light source for detecting the transmittance of the sealing ring test piece, and emits laser to two ends of the cylinder; the vibration exciter generates dynamic rotation conditions to finish the detection of the transmittance of the sealing ring in a dynamic environment; the industrial computer module is used to feedback capture image information.
Compared with the prior art, the invention has the beneficial effects that: the detection module and the lighting unit are arranged at the proper angles of the upper end and the lower end of the cylinder body based on the machine vision sensing module, the detection of the dynamic transmittance of the sealing ring is finished by utilizing a machine vision mode and combining with the vibration exciter device, the working efficiency is high, the detection result is accurate and reliable, and the universality is strong. The machine vision sensing module is led in for detecting the transmittance of the sealing ring to replace the traditional human eye observation mode; simulating an actual dynamic rotation working environment of the sealing ring of the extrusion oil film damper by using a vibration exciter; a laser is adopted to replace light sources such as a traditional bulb and the like so as to meet detection under different environmental working conditions; simultaneously test a pair of sealing rings, promote detection efficiency
Drawings
Fig. 1 is a schematic diagram of a dynamic transmittance test device for a piston ring based on machine vision.
In the figure: 1. a sealing ring to be tested; 2. a laser; 3. a vibration exciter; 4. a support boss; 5. a camera; 6. an image acquisition card; 7. industrial computers.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
Referring to FIG. 1, the invention provides a dynamic transmittance detection test device for a piston ring, which comprises a tester cylinder; the upper surface and the lower surface of the cylinder are matched with light shielding plates, and the tester cylinder is of a cylindrical box structure; a laser is arranged in the middle of the inside of the cylinder body so as to ensure that light at two ends passes through the hole; the lower part of the cylinder body is provided with a cylinder body supporting boss in a matching way for supporting the test device; the two ports on the cylinder body are matched and provided with sealing elements to be tested;
the utility model provides a piston ring dynamic transmittance detects test device based on machine vision includes machine vision perception device module, vision perception device module inside including camera lens, camera, image acquisition card etc. machine vision perception device module install on the tester barrel, lower terminal surface suitable angular position can, after receiving the inside laser instrument light source of tester barrel, machine vision perception module is used for catching the clearance arc length of laser instrument printing opacity position and sealing ring light leak department, when the clearance exceeds a certain specific value to this is the reference and is judged that the sealing ring that awaits measuring closes inequality.
Further, the dynamic transmittance detection test device for the piston ring based on machine vision comprises a vibration exciter device; the vibration exciter device is connected with the lower part of the tester barrel body through a vibration exciting rod and is used for meeting the development of sealing ring detection work in a dynamic rotation environment;
further, the laser is connected with a light source controller for controlling the laser switch and brightness, so as to meet the development of detection work in different environments;
furthermore, the dynamic transmittance test device for the sealing ring based on machine vision is generally an important link for missed detection of the sealing ring structure because some extremely fine defects are difficult to detect and identify through manual vision. After the machine vision detection system is introduced, even the defect that the surface precision and roughness of the sealing ring are extremely fine can be accurately identified and post-processed;
in summary, the invention discloses a machine vision-based dynamic transmittance test device for a sealing ring of an extrusion oil film damper. The utility model provides an extrusion oil film damper sealing ring dynamic transmittance test device based on machine vision, relates to the machine vision field, belongs to aeroengine part detection technical field, provides an extrusion oil film damper sealing ring dynamic transmittance test device based on machine vision, based on machine vision recognition theory, combines visual perception annular camera to catch and is excited by the vibration exciter, and the dynamic light transmission position that the outer anchor ring of sealing ring produced, confirm the sealing ring that awaits measuring the clearance chord length of printing opacity department under dynamic environment, can comparatively accurately confirm sealing ring surface roughness and processing size and fit or not, to sealing ring dynamic detection method commonality poor, detect the problem that the precision is low, provide detection test device. The invention solves the problems, and has great engineering application value for the design of the detection method of the sealing ring of the extrusion oil film damper.
Claims (3)
1. Machine vision-based dynamic transmittance test device for sealing ring of extrusion oil film damper is characterized in that: the laser comprises a cylinder body, a supporting boss arranged below the cylinder body, a vibration exciter connected with the cylinder body through a vibration excitation rod, and sealing pieces to be tested respectively arranged at two ports of the cylinder body, wherein the upper surface and the lower surface of the cylinder body are provided with light shielding plates, and a laser is arranged in the cylinder body; the outside of barrel both ends are equipped with annular camera and image acquisition card respectively, and annular camera and image acquisition card are connected with the computer.
2. The machine vision-based dynamic transmittance test device for the sealing ring of the extrusion oil film damper is characterized in that: the cylinder body is a cylindrical box body.
3. The machine vision-based dynamic transmittance test device for the sealing ring of the extrusion oil film damper is characterized in that: the laser is a light source for detecting the transmittance of the sealing ring test piece, and emits laser to two ends of the cylinder; the vibration exciter generates dynamic rotation conditions to finish the detection of the transmittance of the sealing ring in a dynamic environment; the industrial computer module is used to feedback capture image information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310564405.7A CN116840195A (en) | 2023-05-18 | 2023-05-18 | Dynamic transmittance test device for sealing ring of extrusion oil film damper based on machine vision |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310564405.7A CN116840195A (en) | 2023-05-18 | 2023-05-18 | Dynamic transmittance test device for sealing ring of extrusion oil film damper based on machine vision |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116840195A true CN116840195A (en) | 2023-10-03 |
Family
ID=88169536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310564405.7A Pending CN116840195A (en) | 2023-05-18 | 2023-05-18 | Dynamic transmittance test device for sealing ring of extrusion oil film damper based on machine vision |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116840195A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2929688Y (en) * | 2006-06-16 | 2007-08-01 | 力帆实业(集团)有限公司 | Detector for light seal property of automobile piston ring |
| CN201348498Y (en) * | 2009-01-12 | 2009-11-18 | 河南科技大学 | Light leakage detection device |
| CN201819784U (en) * | 2010-09-20 | 2011-05-04 | 浙江吉利汽车研究院有限公司 | Light leakage detector for piston rings |
| CN204359502U (en) * | 2014-11-14 | 2015-05-27 | 广东工业大学 | A kind of vision inspection apparatus of piston ring light tightness |
| CN105675276A (en) * | 2016-01-13 | 2016-06-15 | 中国航空动力机械研究所 | Device and method for testing vibration damping property of elastic support extruded oil film damper |
| CN105841903A (en) * | 2016-06-04 | 2016-08-10 | 李陶胜 | Automotive piston ring light leakage detecting instrument |
| CN106353076A (en) * | 2016-07-07 | 2017-01-25 | 大连海事大学 | Tester for determining dynamic characteristic coefficient of squeeze film damper |
| CN206523283U (en) * | 2017-03-06 | 2017-09-26 | 湖南人文科技学院 | Piston ring detection means |
| CN108918473A (en) * | 2018-09-10 | 2018-11-30 | 广州益得智教育科技有限公司 | Light transmittance measuring instrument |
| CN115875454A (en) * | 2022-12-07 | 2023-03-31 | 中国航发长春控制科技有限公司 | Differential angle sealing structure and detection method for sealing performance thereof |
-
2023
- 2023-05-18 CN CN202310564405.7A patent/CN116840195A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2929688Y (en) * | 2006-06-16 | 2007-08-01 | 力帆实业(集团)有限公司 | Detector for light seal property of automobile piston ring |
| CN201348498Y (en) * | 2009-01-12 | 2009-11-18 | 河南科技大学 | Light leakage detection device |
| CN201819784U (en) * | 2010-09-20 | 2011-05-04 | 浙江吉利汽车研究院有限公司 | Light leakage detector for piston rings |
| CN204359502U (en) * | 2014-11-14 | 2015-05-27 | 广东工业大学 | A kind of vision inspection apparatus of piston ring light tightness |
| CN105675276A (en) * | 2016-01-13 | 2016-06-15 | 中国航空动力机械研究所 | Device and method for testing vibration damping property of elastic support extruded oil film damper |
| CN105841903A (en) * | 2016-06-04 | 2016-08-10 | 李陶胜 | Automotive piston ring light leakage detecting instrument |
| CN106353076A (en) * | 2016-07-07 | 2017-01-25 | 大连海事大学 | Tester for determining dynamic characteristic coefficient of squeeze film damper |
| CN206523283U (en) * | 2017-03-06 | 2017-09-26 | 湖南人文科技学院 | Piston ring detection means |
| CN108918473A (en) * | 2018-09-10 | 2018-11-30 | 广州益得智教育科技有限公司 | Light transmittance measuring instrument |
| CN115875454A (en) * | 2022-12-07 | 2023-03-31 | 中国航发长春控制科技有限公司 | Differential angle sealing structure and detection method for sealing performance thereof |
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