CN108151639B - Pressure-resistant seal assembly internal part displacement precision measurement device - Google Patents
Pressure-resistant seal assembly internal part displacement precision measurement device Download PDFInfo
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- CN108151639B CN108151639B CN201711361506.5A CN201711361506A CN108151639B CN 108151639 B CN108151639 B CN 108151639B CN 201711361506 A CN201711361506 A CN 201711361506A CN 108151639 B CN108151639 B CN 108151639B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention provides a precision measurement device for the displacement of an internal part of a pressure-resistant sealing assembly, which comprises a high water pressure simulation device and non-contact measurement equipment; the high water pressure simulation device comprises pressure equipment, an autoclave and a pressure tool; the non-contact measuring equipment comprises a mounting bracket, an eddy current sensor array, a watertight connector and a data collector; the high water pressure simulation device provides the pressure required by the test, and the non-contact measuring equipment based on the electric vortex sensor array is used for measuring the displacement of the transducer array surface in the deformation measuring prototype rubber coating under different compression in four times. The invention is suitable for non-contact on-line measurement of the deformation quantity (namely the displacement quantity of the array surface) of the array surface of the transducer array in the underwater vehicle with the front end coated with the pressure-resistant sealing rubber layer under the condition of pressure. The practical requirement of researching the relation of the transducer array surface shape variable of the underwater vehicle along with the pressure change is met.
Description
Technical Field
The invention relates to a precision measurement device for displacement of an internal part of a pressure-resistant sealing assembly, in particular to a non-contact measurement device for linear displacement of the internal part of the pressure-resistant sealing assembly by adopting an eddy current sensor array, and belongs to the technical field of displacement precision measurement.
Background
The application object of the invention is an underwater vehicle, wherein the front end of the pressure-resistant sealing assembly is provided with a rubber coating layer, and the deformation (namely the displacement of the array surface) of the array surface of the internal transducer array under the condition of being pressed is required to be measured on line.
The traditional displacement measuring method such as a mechanical method, a sound measuring method and an optical measuring method can directly measure the displacement of the surface of an object or the visible light surface, but the displacement of the internal part of the sealing assembly cannot be directly measured. In recent years, an industrial photogrammetry method is developed, and the displacement of parts inside an assembly body can be theoretically measured, but for a pressure-resistant sealing assembly body, the displacement is required to be measured on line when a transducer array surface coated inside a rubber layer is pressed, the pressure is provided by an autoclave, industrial photogrammetry equipment is fixed in the autoclave with pressure, and the method has the defects of great difficulty from design to installation, poor realizability and high cost and is not suitable for practical measurement application.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a precision measurement device for the displacement of an internal part of a pressure-resistant sealing assembly, which adopts an eddy current sensor as a non-contact linearization measuring tool and is suitable for online measurement of the deformation (namely the displacement of an array surface) of an array surface of an internal transducer array of an underwater vehicle, the front end of which is coated with a pressure-resistant sealing rubber layer, under the condition of being pressed.
The technical scheme of the invention is as follows:
the precision measurement device of the displacement of the internal part of the pressure-resistant sealing assembly body is characterized in that: comprises a high water pressure simulation device and non-contact measuring equipment;
the high water pressure simulation device comprises pressure equipment, an autoclave and a pressure tool; the pressure tool is of a hollow cylindrical structure, one end of the pressure tool is of a flange plate structure and is fixedly connected with the end face of the autoclave in a sealing way through a bolt and a sealing ring, and the other end of the pressure tool is fixedly connected with the deformation measuring sample machine in a sealing way; the deformation measuring prototype is positioned in a sealed space formed by the autoclave and the pressure tool; the pressure equipment can boost the pressure of water in a sealed space formed by the autoclave and the pressure tool to the pressure required by the measurement of the deformation measuring prototype;
the non-contact measuring equipment comprises a mounting bracket, an eddy current sensor array, a watertight connector and a data collector; the mounting bracket is of a barrel-shaped structure, the opening end is in a flange plate form, and the mounting bracket is fixedly connected to the high-pressure side surface of the flange plate end of the pressure tool through screws; a plurality of through holes for installing an eddy current sensor are formed in the position, right opposite to the transducer unit of the deformation measuring prototype, of the bottom surface of the installing support; the eddy current sensor array is arranged in the through hole on the bottom surface of the mounting bracket, and the centers of the eddy current sensors are in one-to-one correspondence with the centers of the transducer units of the deformation measuring prototype; the signal wires of the electric vortex sensor array are connected into the data collector through a watertight connector which is fixed on the pressure tool in a sealing way.
Further preferably, the device for precisely measuring the displacement of the internal part of the pressure-resistant sealing assembly is characterized in that: the other end of the pressure tool is a wedge ring connecting sealing male end structure; the wedge ring is connected with the sealing male end and is fixedly connected with the deformation measuring prototype in a sealing way through the wedge ring, the wedge ring with the pin and the sealing ring.
Further preferably, the device for precisely measuring the displacement of the internal part of the pressure-resistant sealing assembly is characterized in that: the through holes for installing the eddy current sensor on the bottom surface of the installing support are threaded through holes, and the front end surfaces of all eddy current sensor probes in the eddy current sensor array are positioned in the same plane by controlling the screwing depth of the eddy current sensor, so that a fixed distance is kept between the front end surfaces of the transducer arrays of the deformation measuring prototype.
Further preferably, the device for precisely measuring the displacement of the internal part of the pressure-resistant sealing assembly is characterized in that: the water-tight connector is fixedly connected to the pressure tool in a sealing way through a shaft shoulder, a nut and a sealing ring.
Advantageous effects
The invention is suitable for non-contact on-line measurement of the deformation quantity (namely the displacement quantity of the array surface) of the array surface of the transducer array in the underwater vehicle with the front end coated with the pressure-resistant sealing rubber layer under the condition of pressure. The practical requirement of researching the relation of the transducer array surface shape variable of the underwater vehicle along with the pressure change is met.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic diagram of an embodiment of the present invention;
wherein: a pressure device 1; an autoclave 2; a pressure tool 3; a strain gauge 4; a non-contact measuring device 5; a data acquisition device 6;
FIG. 2 is a schematic diagram of a high water pressure simulator;
wherein: a pressure device 1; an autoclave 2; a pressure tool 3; a strain gauge 4; a wedge ring 7; a wedge ring 8 with pins; a first O-ring 9; a second O-ring seal 10; a bolt and nut group 11;
fig. 3 is a schematic diagram of the structure of the noncontact measuring device.
Wherein: a pressure tool 3; a strain gauge 4; a non-contact measuring device 5; a data acquisition device 6; a mounting bracket 12; a screw 13; a water-tight connector 14; a third O-ring 15; and a nut 16.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Referring to fig. 1, a precision measuring device for displacement of internal parts of a pressure-tight assembly at least includes: a pressure device 1; an autoclave 2; a pressure tool 3; a strain gauge 4; a non-contact measuring device 5; a data acquisition device 6. The pressure equipment 1, the autoclave 2, the pressure tool 3 and the deformation measuring prototype 4 form a high water pressure simulation device, the pressure equipment 1 is started to boost the water in the pressure container 2 to the pressure required by the deformation measuring prototype 4 test, and a high water pressure test environment is provided for the deformation measuring prototype 4; the non-contact measuring equipment 5 is fixedly connected with the pressure tool 3, and the displacement of the end faces of 13 transducer units corresponding to the 1/4 transducer array under different pressures is measured. By changing the radial connection position of the non-contact measuring equipment 5 and the pressure tool 3, namely rotating the non-contact measuring equipment 5 by 90 degrees and fixedly connecting the non-contact measuring equipment 5 with the pressure tool 3 again, the displacement of the end face of the second 1/4 transducer array unit under different pressures can be carried out. The displacement of the end faces of the third and fourth 1/4 transducer array units under different pressures can be measured by adopting the same method. Thus, the displacement of the whole transducer unit end face of the deformation measuring prototype 4 under different pressures can be measured; the data acquisition device 6 acquires and stores all the measured data.
Referring to fig. 2, the high water pressure simulation device at least includes: a pressure device 1; an autoclave 2; a pressure tool 3; a strain gauge 4; a wedge ring 7; a wedge ring 8 with pins; a first O-ring 9; a second O-ring seal 10; bolt, nut set 11. The pressure equipment 1 is used for boosting the test water in the autoclave 2 to the pressure (0-10 MPa) required by the test; the pressure tool 3 and the deformation measuring machine 4 are fastened and connected through a wedge ring 7 and a wedge ring 8 with pins, and radial sealing is realized through a first O-shaped sealing ring 9; the pressure tool 3 and the autoclave 2 are in sealing connection through a second O-shaped sealing ring 10 and a bolt and nut group 11. The deformation measuring sample machine side is placed in test water of a pressure container 2, and a high water pressure simulation device is formed after assembly.
Referring to fig. 3, the non-contact measurement device at least includes: a mounting bracket 12; a non-contact measuring device 5; a water-tight connector 14; a data collector 6. The non-contact measuring device 5 adopts an eddy current sensor array (13) 5, and the eddy current sensor is a non-contact linear measuring tool and can accurately measure the relative displacement change between a measured object (necessarily a metal conductor) and the probe end face. The device has the advantages of non-contact, high linearity, high resolution and small volume, and is easy to be assembled and measured in a plurality of integrated ways.
The mounting bracket 12 provides a mounting reference and a connecting interface for the eddy current sensor array 5, 13 eddy current sensors are respectively screwed in corresponding threaded holes of the mounting bracket 12, and the front end face of the probe of the eddy current sensor is ensured to be in a plane and keeps a fixed distance with the front end face of the transducer array of the deformation measuring prototype by limiting the screwing depth of the 13 eddy current sensors; the mounting bracket 12 and the pressure tool 3 are fixedly connected on the high-pressure water side through screws (8) 13, the fixedly connecting direction just enables the eddy current sensor array to correspond to the 1/4 transducer array of the deformation measuring prototype, the center of each eddy current sensor probe corresponds to the center of the front end face of the corresponding transducer of the deformation measuring prototype one by one, the accurate measurement of the 1/4 transducer array face position under the conditions of zero pressure and certain pressure is realized, and the difference value is the displacement of the measured transducer array face; and (3) fixedly connecting the mounting bracket 12 with the pressure tool 3 by rotating the mounting bracket by 90 degrees around the axial direction, so that the eddy current sensor array corresponds to the second 1/4 transducer array of the deformation measuring prototype, and carrying out displacement measurement. According to the method, the fixedly connecting direction of the mounting bracket 12 and the pressure tool 3 is changed, the displacement measurement of the third and fourth 1/4 transducer arrays of the deformation measuring prototype can be completed, and the displacement measurement of the transducer array of the whole deformation measuring prototype can be realized through four times of measurement; the connecting cable of the electric vortex sensor is led out of the high-pressure water testing area through the watertight connector 14, is connected into the data collector 6 arranged outside the high-pressure testing area, the watertight connector 14 is fixedly connected onto the pressure tool 3 in a sealing mode through the shaft shoulder, the nut 16 and the third O-shaped sealing ring 15, and the data collector 6 collects and stores displacement amounts measured by the electric vortex sensors.
The operation steps of this embodiment are:
1. the deformation measuring prototype is fixedly connected to the pressure tool in a sealing way through a wedge ring, a wedge ring with a pin and an O-shaped sealing ring;
2. respectively installing 13 groups of eddy current sensors into 13 threaded holes on the bottom surface of the mounting bracket to form an eddy current sensor array;
3. fixedly connecting a mounting bracket with an eddy current sensor on a pressure tool through a screw, wherein the mounting bracket is on the same side as a deformation measuring prototype, and ensuring that an eddy current sensor array corresponds to 1/4 of a transducer array of the measuring prototype; (alignment of the reticle on the strain gauge and the reticle on the mounting bracket to achieve sensor array and transducer array correspondence)
4. Adjusting the screwing depth of the eddy current sensor in the screw hole of the mounting bracket, so that the distance between the probe of the eddy current sensor and the array surface of the transducer to be measured is in the range of the eddy current sensor, and the probe end faces of 13 eddy current sensors are in a plane and are equal to the distance between the probe end faces of the corresponding transducers;
5. leading out the connecting cables of all the eddy current sensors through watertight connectors, wherein the watertight connectors are hermetically connected to the pressure tool through threads, nuts and O-shaped sealing rings;
6. the built measuring device is sealed and fixedly connected on the autoclave through a pressure tool flange and an O-shaped sealing ring, and a deformation measuring model machine end is placed on a high-pressure water side;
7. connecting an eddy current sensor connecting cable led out from the watertight connector with a data collector;
8. the initial distance between the probe end face of each eddy current sensor in the eddy current sensor array and the corresponding transducer unit array face in the deformation measuring prototype is measured at the moment, and the initial distance is calculated as X 10 ；
9. The autoclave is pressurized to any pressure not more than 10MPa, and under the condition that the pressure is measured, the distance between the end face of each eddy current sensor probe in the eddy current sensor array and the corresponding transducer unit array face in the deformation measuring prototype is sequentially X 101 、X 102 、X 103 、......X 113 The method comprises the steps of carrying out a first treatment on the surface of the Then under this pressure, the deformation measuring prototype 1/4 transducerThe displacement amounts of the array faces of the 13 transducer units of the array are respectively as follows: x is X 101 -X 10 、X 102 -X 10 、X 103 -X 10 、......X 113 -X 10 ；
10. The autoclave is depressurized to zero pressure, the pressure tool and the autoclave connecting screw are disassembled, and the measuring device is moved out of the autoclave. Removing the mounting bracket with the eddy current sensor from the pressure tool, rotating the mounting bracket with the eddy current sensor by 90 degrees along the axial direction, and fixedly connecting the mounting bracket with the eddy current sensor with the pressure tool again to enable the eddy current sensor array to correspond to the second 1/4 transducer array of the deformation measuring prototype;
11. measuring the initial distance between the probe end face of each eddy current sensor and the corresponding transducer unit array face of the second 1/4 transducer array of the deformation measuring prototype according to the step 8, and counting as X 20 The method comprises the steps of carrying out a first treatment on the surface of the The displacement amounts of the 13 transducer unit array surfaces of the second 1/4 transducer array of the deformation measuring prototype measured according to the step 9 are respectively as follows: x is X 201 -X 20 、X 202 -X 20 、X 203 -X 20 、......X 213 -X 20 ；
12. According to the method of step 10, the eddy current sensor array corresponds to the third 1/4 transducer array of the deformation measuring prototype;
13. measuring the initial distance between the probe end face of each eddy current sensor and the transducer unit array face corresponding to the third 1/4 transducer array of the deformation measuring prototype according to the step 8, and counting as X 30 The method comprises the steps of carrying out a first treatment on the surface of the The displacement amounts of the 13 transducer unit array surfaces of the second 1/4 transducer array of the deformation measuring prototype measured according to the step 9 are respectively as follows: x is X 301 -X 30 、X 302 -X 30 、X 303 -X 30 、......X 313 -X 30 ；
14. According to the method of the step 10, the eddy current sensor array corresponds to the fourth 1/4 transducer array of the deformation measuring prototype;
15. measuring the initial distance between the probe end face of each eddy current sensor and the corresponding transducer unit array face of the fourth 1/4 transducer array of the deformation measuring prototype according to the step 8, and counting as X 40 The method comprises the steps of carrying out a first treatment on the surface of the According to the steps ofThe displacement amounts of the array surfaces of 13 transducer units of the second 1/4 transducer array of the deformation measuring prototype measured in the step 9 are respectively as follows: x is X 401 -X 40 、X 402 -X 40 、X 403 -X 40 、......X 413 -X 40 ；
16. And (5) measuring the displacement of the whole transducer array under the pressure by the deformation measuring prototype.
Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the invention.
Claims (2)
1. A precision measurement device of pressure-resistant seal assembly internal part displacement volume, its characterized in that: comprises a high water pressure simulation device and non-contact measuring equipment;
the high water pressure simulation device comprises pressure equipment, an autoclave and a pressure tool; the pressure tool is of a hollow cylindrical structure, one end of the pressure tool is of a flange plate structure and is fixedly connected with the end face of the autoclave in a sealing way through a bolt and a sealing ring, and the other end of the pressure tool is of a wedge ring connection sealing male end structure; the wedge ring is connected with the sealing male end and is fixedly connected with the deformation measuring prototype in a sealing way through the wedge ring, the wedge ring with the pin and the sealing ring; the deformation measuring prototype is positioned in a sealed space formed by the autoclave and the pressure tool; the pressure equipment can boost the pressure of water in a sealed space formed by the autoclave and the pressure tool to the pressure required by the measurement of the deformation measuring prototype;
the non-contact measuring equipment comprises a mounting bracket, an eddy current sensor array, a watertight connector and a data collector; the mounting bracket is of a barrel-shaped structure, the opening end is in a flange plate form, and the mounting bracket is fixedly connected to the high-pressure side surface of the flange plate end of the pressure tool through screws; a plurality of through holes for installing an eddy current sensor are formed in the position, right opposite to the transducer unit of the deformation measuring prototype, of the bottom surface of the installing support; the eddy current sensor array is arranged in the through hole on the bottom surface of the mounting bracket, and the centers of the eddy current sensors are in one-to-one correspondence with the centers of the transducer units of the deformation measuring prototype; the through holes for installing the eddy current sensors on the bottom surface of the mounting bracket are threaded through holes, and the front end surfaces of all eddy current sensor probes in the eddy current sensor array are positioned in the same plane by controlling the screwing depth of the eddy current sensors, so that a fixed distance is kept between the front end surfaces of the eddy current sensor probes and the front end surfaces of the transducer arrays of the deformation measuring prototype; the signal wires of the electric vortex sensor array are connected into the data collector through a watertight connector which is fixed on the pressure tool in a sealing way.
2. The precision measurement device for the displacement of the internal parts of the pressure-tight assembly according to claim 1, wherein: the water-tight connector is fixedly connected to the pressure tool in a sealing way through a shaft shoulder, a nut and a sealing ring.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711361506.5A CN108151639B (en) | 2017-12-18 | 2017-12-18 | Pressure-resistant seal assembly internal part displacement precision measurement device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711361506.5A CN108151639B (en) | 2017-12-18 | 2017-12-18 | Pressure-resistant seal assembly internal part displacement precision measurement device |
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| CN108151639A CN108151639A (en) | 2018-06-12 |
| CN108151639B true CN108151639B (en) | 2023-09-01 |
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| CN113028973B (en) * | 2021-02-26 | 2022-12-13 | 北京控制工程研究所 | Method and system for measuring micro-deformation of shaft hole in sealed space |
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| US7197938B2 (en) * | 2003-06-24 | 2007-04-03 | Cidra Corporation | Contact-based transducers for characterizing unsteady pressures in pipes |
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| US4559821A (en) * | 1982-04-06 | 1985-12-24 | Kistler Instrumente A.G. | High pressure transducer |
| CN201514198U (en) * | 2009-10-10 | 2010-06-23 | 国网电力科学研究院 | Seal structure suitable for differential electric resistance strain gage and joint gage |
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| CN106053240A (en) * | 2016-05-20 | 2016-10-26 | 河海大学 | Hydraulic fracture simulated experiment design method and device of simultaneously loaded concrete member |
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