CN114216479B - Nondestructive testing method for bubbles in liquid floating gyroscope - Google Patents
Nondestructive testing method for bubbles in liquid floating gyroscope Download PDFInfo
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- CN114216479B CN114216479B CN202111371695.0A CN202111371695A CN114216479B CN 114216479 B CN114216479 B CN 114216479B CN 202111371695 A CN202111371695 A CN 202111371695A CN 114216479 B CN114216479 B CN 114216479B
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- 239000007788 liquid Substances 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000009659 non-destructive testing Methods 0.000 title claims abstract description 12
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 239000000523 sample Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000007405 data analysis Methods 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013441 quality evaluation Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C25/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Gyroscopes (AREA)
Abstract
The invention relates to a liquid floating gyroscope, in particular to a nondestructive testing method for bubbles in the liquid floating gyroscope, which is used for solving the defects that the operation method of the existing liquid floating gyroscope is complex, the data analysis difficulty is high, and the hidden bubble products cannot be completely removed. The nondestructive testing method for the internal bubbles of the liquid floated gyroscope utilizes the volume compensation component height change of the liquid floated gyroscope caused by the expansion of the internal bubbles of the liquid floated gyroscope in a vacuum environment, realizes the high-sensitivity detection of the internal bubbles of the liquid floated gyroscope, has simple operation, is easy to implement, is suitable for various liquid floated gyroscopes, and has wide application range.
Description
Technical Field
The invention relates to a liquid floating gyroscope, in particular to a nondestructive testing method for bubbles in the liquid floating gyroscope.
Background
The liquid floated gyroscope has the advantages of high precision, strong mechanical environment capacity such as vibration resistance and impact resistance, high environment temperature change adaptation capacity, small volume, light weight and the like, and is widely applied to inertial navigation and inertial guidance systems. The liquid floated gyroscope has a complex structure, high assembly precision requirement and small internal clearance of a product, the minimum clearance is only in a micron level, and if bubbles exist in the liquid floated gyroscope, interference moment can be generated, so that the drift stability of the gyroscope is out of tolerance.
Referring to fig. 1, if there is a bubble 02 in the liquid floated gyroscope, the output result of the liquid floated gyroscope is inconsistent and has large difference due to uncertainty and instability of the position of the bubble 02, and the interpretation of the test result is affected. When the bubbles 02 act on the floater 03, interference moment is generated in the motion process of the bubbles, so that the current of the hydraulic floating gyro torquer is increased, the hydraulic floating gyro drifts and changes, and the gyro output is abnormal; when the bubble 02 exists in the floating liquid 01, the density of the bubble 02 is far smaller than that of the floating liquid 01 in the temperature change and posture overturning processes of the liquid floating gyro, so that the bubble 02 moves to a higher position of the floating liquid 01, the bubble 02 moves slowly due to a larger viscosity ratio of the floating liquid 01, interference moment is generated by the movement of the bubble 02, and slow floating phenomenon occurs in the output of the liquid floating gyro; when the bubbles 02 are attached to the end cover and the shell assembly, the parameters of the liquid floating gyro are not affected.
At present, whether bubbles exist in the liquid floating gyroscope or not is judged to need to be subjected to an electrifying overturning test, an operation method is complex, data analysis difficulty is high, the method can only detect the bubbles on the floater and in the floating liquid, and when the bubbles are on a non-operation body, the method can not completely remove products with hidden bubble hazards.
Disclosure of Invention
The invention aims to solve the defects that the operation method of the existing liquid floated gyroscope internal bubble detection method is complex, the data analysis difficulty is high, and the hidden bubble hidden danger product cannot be completely removed, and provides the liquid floated gyroscope internal bubble nondestructive detection method.
In order to solve the defects existing in the prior art, the invention provides the following technical solutions:
the nondestructive testing method for the bubbles in the liquid floated gyroscope is characterized by comprising the following steps of:
step (1): sealing the liquid floating gyroscope to be detected filled with the floating liquid, and detecting that the liquid floating gyroscope is free from oil leakage;
step (2): horizontally placing the top surface seat on the inner bottom surface of a transparent vacuum container capable of detecting vacuum degree, placing the liquid-floated top to be detected on the top surface seat, and exposing a volume compensation component of the liquid-floated top to be detected; placing the height detection device into a transparent vacuum container, ensuring that a probe of the height detection device contacts with a volume compensation component of the liquid floated gyroscope to be detected, and detecting the standard height of the volume compensation component under a standard atmospheric pressure; after the height detection device is cleared, the transparent vacuum container is sealed;
step (3): vacuumizing the transparent vacuum container, when the vacuum degree reaches the vacuum degree requirement of the oil filling of the liquid floating gyroscope to be detected, keeping the vacuum degree for 5-6 min, and recording the maximum difference between the height of the liquid floating gyroscope to be detected in the vacuum environment read by the height detection device and the standard height in the step (2);
step (4): if the maximum difference value in the step (3) is not greater than the preset value, the bubbles are considered to exist in the liquid floating gyroscope to be detected; otherwise, the liquid floated gyroscope to be detected is considered to have no bubble.
Further, in the step (2), the volume compensation component of the liquid floated gyroscope to be detected is a bellows component.
Further, in the step (4), the preset value is 0.005mm.
Further, the height detection device is a height micrometer.
Compared with the prior art, the invention has the beneficial effects that:
(1) The invention discloses a nondestructive testing method for internal bubbles of a liquid floated gyroscope, which utilizes the volume compensation component height change of the liquid floated gyroscope caused by the expansion of the internal bubbles of the liquid floated gyroscope in a vacuum environment, realizes the high-sensitivity detection of the internal bubbles of the liquid floated gyroscope, has simple operation, is easy to implement, is suitable for various liquid floated gyroscopes, and has wide application range.
(2) The invention is not influenced by the position or the position of the bubble, can realize early screening and assembly and oil filling quality evaluation in the assembly stage of the liquid floated gyroscope, eliminates the product with hidden bubble trouble, reduces the cost of the manufacturing process, provides guarantee for the gyroscope precision and long-term stability, and achieves the purpose of risk management and control.
Drawings
FIG. 1 is a schematic diagram of a structure in which bubbles exist in a liquid of a liquid-floated gyroscope.
The reference numerals are as follows: 01-floating liquid, 02-bubbles and 03-floats.
Detailed Description
The invention is further described below with reference to the drawings and exemplary embodiments.
A nondestructive testing method for bubbles in a liquid floated gyroscope comprises the following steps:
step (1): sealing the two floating gyroscopes to be detected filled with the floating liquid, and detecting the two floating gyroscopes without oil leakage;
step (2): placing the gyro meter seat on the inner bottom surface of the vacuum tank, placing two to-be-detected floating gyroscopes on the gyro meter seat, and exposing the bellows assembly of the to-be-detected liquid floating gyroscopes; placing the height micrometer into a vacuum tank, ensuring that a probe of the height micrometer contacts with a bellows cover of a liquid-floated gyroscope to be detected, and detecting the standard height of the volume compensation component under standard atmospheric pressure; after the height micrometer is cleared, the vacuum tank is sealed;
step (3): vacuumizing the vacuum tank, when the vacuum degree meets the vacuum degree requirement of oil filling of the two floating gyroscopes to be detected, maintaining the vacuum degree for 5min, and recording the maximum difference between the height of the vacuum tank read by the height micrometer within 5min and the standard height in the step (2);
step (4): if the maximum difference value of the height micrometer readings in the step (3) is not more than 0.005mm, the bubbles are considered to exist in the two floating gyroscopes to be detected; otherwise, the two floating gyroscopes to be detected are considered to have no bubbles inside.
The foregoing embodiments are merely for illustrating the technical solutions of the present invention, and not for limiting the same, and it will be apparent to those skilled in the art that modifications may be made to the specific technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, without departing from the spirit of the technical solutions protected by the present invention.
Claims (4)
1. The nondestructive testing method for the bubbles in the liquid floated gyroscope is characterized by comprising the following steps of:
step (1): sealing the liquid floating gyroscope to be detected filled with the floating liquid, and detecting that the liquid floating gyroscope is free from oil leakage;
step (2): horizontally placing a top gauge stand on the inner bottom surface of a transparent vacuum container capable of detecting vacuum degree, placing a liquid-floated top to be detected on the top gauge stand, and exposing a volume compensation component of the liquid-floated top to be detected; placing the height detection device into a transparent vacuum container, ensuring that a probe of the height detection device contacts with a volume compensation component of the liquid floated gyroscope to be detected, and detecting the standard height of the volume compensation component under a standard atmospheric pressure; after the height detection device is cleared, the transparent vacuum container is sealed;
step (3): vacuumizing the transparent vacuum container, when the vacuum degree reaches the vacuum degree requirement of the oil filling of the liquid floating gyroscope to be detected, keeping the vacuum degree for 5-6 min, and recording the maximum difference between the height of the liquid floating gyroscope to be detected in the vacuum environment read by the height detection device and the standard height in the step (2);
step (4): if the maximum difference value in the step (3) is not greater than the preset value, the bubbles are considered to exist in the liquid floating gyroscope to be detected; otherwise, the liquid floated gyroscope to be detected is considered to have no bubble.
2. The method for nondestructive testing of bubbles in a liquid floated gyroscope according to claim 1, wherein the method comprises the following steps: in the step (2), the volume compensation component of the liquid floated gyroscope to be detected is a corrugated pipe component.
3. The method for nondestructive testing of bubbles in a liquid floated gyroscope according to claim 2, wherein the method comprises the following steps: in the step (4), the preset value is 0.005mm.
4. A method for nondestructive testing of bubbles inside a liquid floated gyroscope according to any one of claims 1 to 3, wherein: the height detection device is a height micrometer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111371695.0A CN114216479B (en) | 2021-11-18 | 2021-11-18 | Nondestructive testing method for bubbles in liquid floating gyroscope |
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|---|---|---|---|
| CN202111371695.0A CN114216479B (en) | 2021-11-18 | 2021-11-18 | Nondestructive testing method for bubbles in liquid floating gyroscope |
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| CN114216479A CN114216479A (en) | 2022-03-22 |
| CN114216479B true CN114216479B (en) | 2024-02-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115655317B (en) * | 2022-12-26 | 2023-03-21 | 西安航天精密机电研究所 | Method for detecting and debugging working temperature range and working temperature point of double-floating-top gyroscope |
| CN116006359B (en) * | 2023-03-28 | 2023-07-18 | 北京凌空天行科技有限责任公司 | Liquid fuel tank valve control method, control system and bubble detection device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2854850A (en) * | 1954-05-21 | 1958-10-07 | Sperry Rand Corp | Liquid floated gyroscopic apparatus |
| US3237458A (en) * | 1962-10-29 | 1966-03-01 | Sperry Rand Corp | Liquid floated gyroscopic apparatus |
| CN102889886A (en) * | 2011-07-22 | 2013-01-23 | 上海新跃仪表厂 | Liquid floated gyroscope |
| CN112595346A (en) * | 2020-12-09 | 2021-04-02 | 贵州航天控制技术有限公司 | Automatic temperature cycle testing method, system and control device for liquid floating gyroscope |
| CN113447009A (en) * | 2021-05-24 | 2021-09-28 | 西安航天时代精密机电有限公司 | Liquid floating gyroscope trial assembly device based on full rubber ring sealing structure |
-
2021
- 2021-11-18 CN CN202111371695.0A patent/CN114216479B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2854850A (en) * | 1954-05-21 | 1958-10-07 | Sperry Rand Corp | Liquid floated gyroscopic apparatus |
| US3237458A (en) * | 1962-10-29 | 1966-03-01 | Sperry Rand Corp | Liquid floated gyroscopic apparatus |
| CN102889886A (en) * | 2011-07-22 | 2013-01-23 | 上海新跃仪表厂 | Liquid floated gyroscope |
| CN112595346A (en) * | 2020-12-09 | 2021-04-02 | 贵州航天控制技术有限公司 | Automatic temperature cycle testing method, system and control device for liquid floating gyroscope |
| CN113447009A (en) * | 2021-05-24 | 2021-09-28 | 西安航天时代精密机电有限公司 | Liquid floating gyroscope trial assembly device based on full rubber ring sealing structure |
Non-Patent Citations (2)
| Title |
|---|
| 基于机器视觉检测的陀螺液浮组件平衡装置;段嘉兴等;《机电工程技术》;第48卷(第10期);105-107 * |
| 液浮陀螺与气浮陀螺;张宗美;;导弹与航天运载技术(第03期);50-69 * |
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