CN111351421A - Floating ring monitoring device, system and method - Google Patents
Floating ring monitoring device, system and method Download PDFInfo
- Publication number
- CN111351421A CN111351421A CN202010354666.2A CN202010354666A CN111351421A CN 111351421 A CN111351421 A CN 111351421A CN 202010354666 A CN202010354666 A CN 202010354666A CN 111351421 A CN111351421 A CN 111351421A
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- displacement sensor
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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
- G01B7/003—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring position, not involving coordinate determination
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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
- G01B7/14—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring distance or clearance between spaced objects or spaced apertures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
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- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The disclosure relates to the technical field of aircraft engines, and provides a floating ring monitoring device, a system and a method, wherein the floating ring monitoring device is used for monitoring a floating ring of a floating ring sealing mechanism, the floating ring monitoring device comprises an installation seat, a displacement sensor and a collector, and the installation seat is arranged on the floating ring sealing mechanism; the displacement sensor is arranged on the mounting seat, and a probe of the displacement sensor faces the floating ring; the collector is in signal connection with the displacement sensor. This disclosed floating ring monitoring devices installs displacement sensor on floating ring sealing mechanism through the mount pad to make displacement sensor's probe towards floating ring, with this positional information that can acquire floating ring in real time, and carry positional information to the collector in real time. Because the displacement sensor can acquire the position information of the floating ring in real time in the use process of the floating ring sealing mechanism, the problem that the position information of the floating ring in the use process cannot be acquired in the prior art is solved.
Description
Technical Field
The disclosure relates to the technical field of aircraft engines, in particular to a floating ring monitoring device, system and method.
Background
Aeroengine floating ring seals are gap-type circumferential seals that limit leakage by fluid resistance through a small gap. When the rotating shaft starts to rotate, the floating ring is driven by the rotating shaft to rotate, and sealing pressure is gradually built. When the buoyancy is larger than the resultant force of the gravity of the sealing ring, the inertia force of the floating motion and the friction force of the contact load of the sealing ring and the end face of the shell, the floating ring floats. The floating ring is separated from the surface of the rotating shaft by a rigid fluid film, namely a certain radial clearance exists, so that the frictional contact between solids can be reduced, and the gas on the high-pressure side is prevented from leaking to the low-pressure side. In order to prevent the floating ring seal from rubbing with the rotating shaft during actual operation and ensure the safety and reliability of the floating ring seal, the gap between the floating ring and the rotating shaft needs to be measured in real time, so that a basis is provided for the motion law research of the floating ring. However, the position of the floating ring in the use process cannot be obtained in the prior art, so that the gap between the floating ring and the rotating shaft cannot be determined.
Disclosure of Invention
The disclosure provides a floating ring monitoring device, a floating ring monitoring system and a floating ring monitoring method, which aim to solve the problem that position information of a floating ring in a using process cannot be acquired in the prior art.
According to a first aspect of the present invention, there is provided a floating ring monitoring device for monitoring a floating ring of a floating ring seal mechanism, the floating ring monitoring device comprising:
the mounting seat is arranged on the floating ring sealing mechanism;
the displacement sensor is arranged on the mounting seat, and a probe of the displacement sensor faces the floating ring;
and the collector is in signal connection with the displacement sensor.
In one embodiment of the invention, the mounting seat is provided with a mounting hole, and the displacement sensor passes through the mounting hole;
wherein the displacement sensor is movably arranged relative to the mounting hole to adjust the distance between the probe and the floating ring.
In one embodiment of the invention, the mounting hole is a threaded hole, and the displacement sensor is in threaded connection with the mounting hole.
In one embodiment of the invention, the displacement sensor is provided in plurality, and the displacement sensors are all arranged on the mounting seat and are arranged at intervals along the circumferential direction of the floating ring.
In one embodiment of the present invention, the floating ring monitoring device further comprises:
the preamplifier is in signal connection with the collector and the displacement sensor.
In one embodiment of the invention, the displacement sensor is an eddy current displacement sensor, the collector is a dynamic signal tester, the preamplifier supplies alternating current to the eddy current displacement sensor, a harmonic signal output by the eddy current displacement sensor is amplified, detected and filtered by the preamplifier to obtain an output voltage in direct proportion to the distance, and the dynamic signal tester collects and records the output voltage.
According to a second aspect of the present invention, there is provided a floating ring monitoring system comprising the above floating ring monitoring device and a floating ring sealing mechanism, the floating ring sealing mechanism comprising:
a body;
the rotating shaft is rotatably arranged on the body;
the floating ring sealing runway is sleeved on the rotating shaft and is fixedly arranged relative to the rotating shaft;
the floating ring is sleeved on the floating ring sealing runway.
According to a third aspect of the present invention, there is provided a floating ring monitoring method comprising:
acquiring real-time position information of the floating ring, wherein the real-time position information is a harmonic signal;
amplifying, detecting and filtering the harmonic signals to obtain output voltage in direct proportion to the distance;
the output voltage is collected and recorded.
In an embodiment of the present invention, a plurality of displacement sensors are simultaneously used to obtain a plurality of sets of real-time position information, before obtaining the real-time position information of the floating ring, the floating ring monitoring method further includes adjusting the position of the displacement sensors, where adjusting the position of the displacement sensors includes:
inserting the thin sheet between the inner hole of the floating ring and the floating ring sealing runway;
adjusting the mounting clearance between each displacement sensor and the floating ring so that each displacement sensor is mounted at the linear midpoint of the measuring range of the displacement sensor;
and (4) pulling out the thin sheet.
In one embodiment of the present invention, the floating ring monitoring method further comprises:
acquiring the real-time rotating speed of the rotating shaft, and synchronously acquiring real-time position information and the real-time rotating speed so that the real-time position information corresponds to the real-time rotating speed;
and determining a mutation point in the real-time position information, wherein the rotating speed corresponding to the mutation point is the rotating speed of the rotating shaft for driving the floating ring to float.
According to the floating ring monitoring device, the displacement sensor is arranged on the floating ring sealing mechanism through the mounting seat, so that the probe of the displacement sensor faces the floating ring, the position information of the floating ring can be acquired in real time, and the position information is transmitted to the collector in real time. Because the displacement sensor can acquire the position information of the floating ring in real time in the use process of the floating ring sealing mechanism, the problem that the position information of the floating ring in the use process cannot be acquired in the prior art is solved.
Drawings
Various objects, features and advantages of the present disclosure will become more apparent from the following detailed description of preferred embodiments thereof, when considered in conjunction with the accompanying drawings. The drawings are merely exemplary illustrations of the disclosure and are not necessarily drawn to scale. In the drawings, like reference characters designate the same or similar parts throughout the different views. Wherein:
FIG. 1 is a schematic diagram of a portion of a floating ring monitoring system according to an exemplary embodiment;
FIG. 2 is an enlarged, fragmentary, schematic illustration of a floating ring monitoring system according to an exemplary embodiment;
FIG. 3 is a schematic diagram illustrating the construction of a floating ring monitoring device according to an exemplary embodiment;
FIG. 4 is a graph illustrating test results of a floating ring monitoring device according to an exemplary embodiment.
The reference numerals are explained below:
1. a floating ring sealing mechanism; 10. a floating ring; 11. a body; 12. a rotating shaft; 13. the floating ring seals the runway; 14. a collar; 15. a retainer ring; 16. a wave spring; 17. a gasket; 18. locking the nut; 19. a locking plate; 2. a housing; 20. a mounting seat; 21. mounting holes; 30. a displacement sensor; 40. a collector; 41. a preamplifier.
Detailed Description
Exemplary embodiments that embody features and advantages of the present disclosure are described in detail below in the specification. It is to be understood that the disclosure is capable of various modifications in various embodiments without departing from the scope of the disclosure, and that the description and drawings are to be regarded as illustrative in nature, and not as restrictive.
In the following description of various exemplary embodiments of the disclosure, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various exemplary structures, systems, and steps in which aspects of the disclosure may be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps may be utilized and structural and functional modifications may be made without departing from the scope of the present disclosure. Moreover, although the terms "over," "between," "within," and the like may be used in this specification to describe various example features and elements of the disclosure, these terms are used herein for convenience only, e.g., in accordance with the orientation of the examples in the figures. Nothing in this specification should be construed as requiring a specific three dimensional orientation of structures in order to fall within the scope of this disclosure.
An embodiment of the present invention provides a floating ring monitoring device for monitoring a floating ring 10 of a floating ring sealing mechanism 1, referring to fig. 1 to 3, the floating ring monitoring device includes: the mounting seat 20 is arranged on the floating ring sealing mechanism 1; the displacement sensor 30 is arranged on the mounting base 20, and a probe of the displacement sensor 30 faces the floating ring 10; and the collector 40 is in signal connection with the displacement sensor 30.
In the floating ring monitoring device according to an embodiment of the present invention, the displacement sensor 30 is mounted on the floating ring sealing mechanism 1 through the mounting seat 20, so that the probe of the displacement sensor 30 faces the floating ring 10, thereby acquiring the position information of the floating ring 10 in real time and transmitting the position information to the collector 40 in real time. Because the displacement sensor 30 can acquire the position information of the floating ring 10 in real time in the use process of the floating ring sealing mechanism 1, the problem that the position information of the floating ring in the use process cannot be acquired in the prior art is solved.
In one embodiment, the mounting seat 20 is detachably disposed on the floating ring seal mechanism 1, i.e., the mounting seat 20 and the floating ring seal mechanism 1 are separate structures. Or the mounting seat 20 is a part of the floating ring sealing mechanism 1, and the mounting of the displacement sensor 30 is completed by the structure of the floating ring sealing mechanism 1.
In one embodiment, as shown in fig. 2, the mounting seat 20 is provided with a mounting hole 21, and the displacement sensor 30 passes through the mounting hole 21; wherein the displacement sensor 30 is movably disposed with respect to the mounting hole 21 to adjust a distance between the probe and the floating ring 10. Displacement sensor 30 sets up in mounting hole 21, the setting of mounting hole 21 can guarantee that displacement sensor 30's probe stretches into in the enclosure space of floating ring sealing mechanism 1, and towards floating ring 10, and when specifically using, because the relative position of displacement sensor 30 and floating ring 10 need be adjusted, so need guarantee that displacement sensor 30 is for the movably setting of mounting hole 21, after the position control finishes fixing displacement sensor 30, with mounting hole 21 relatively fixed, guarantee that the position can not appear in the measurement process and remove, with this accuracy of guaranteeing the measuring result.
In one embodiment, the mounting hole 21 is a threaded hole, and the displacement sensor 30 is threadedly coupled to the mounting hole 21. The threaded connection can not only ensure the stability of connection, but also ensure the position adjustment of the displacement sensor 30 relative to the mounting hole 21, the whole adjustment process only needs to rotate the displacement sensor 30, and the controllability of the adjustment is also better.
In one embodiment, as shown in fig. 3, the displacement sensor 30 is plural, and the plural displacement sensors 30 are disposed on the mount 20 and are spaced apart in the circumferential direction of the floating ring 10. The displacement sensors 30 simultaneously acquire position information of a plurality of position points of the floating ring 10, and each displacement sensor 30 is installed at a linear midpoint of a measurement range thereof.
In one embodiment, as shown in fig. 3, the floating ring monitoring device further comprises: the preamplifier 41 is connected with the collector 40 and the displacement sensor 30 through signals of the preamplifier 41. The preamplifier 41 is in signal connection with the collector 40 and the displacement sensor 30, and can provide current to the displacement sensor 30, and can also process signals acquired by the displacement sensor 30.
In one embodiment, displacement sensor 30 is an eddy current displacement sensor, collector 40 is a dynamic signal tester, preamplifier 41 supplies alternating current to the eddy current displacement sensor, the harmonic signal output by the eddy current displacement sensor is amplified, detected and filtered by preamplifier 41 to obtain an output voltage proportional to the distance, and the dynamic signal tester collects and records the output voltage.
In one embodiment, the floating ring monitoring device further includes a rotation speed sensor, the rotation speed sensor is configured to obtain a real-time rotation speed of the rotating shaft 12 of the floating ring sealing mechanism 1, and the real-time position information obtained by the displacement sensor 30 corresponds to the real-time rotation speed obtained by the rotation speed sensor, so that after a sudden change point in the real-time position information is determined, the corresponding rotation speed of the sudden change point is the rotation speed of the rotating shaft 12 driving the floating ring 10 to float.
An embodiment of the present invention further provides a floating ring monitoring system, please refer to fig. 1, including the above floating ring monitoring apparatus and a floating ring sealing mechanism 1, where the floating ring sealing mechanism 1 includes: a body 11; a rotating shaft 12, wherein the rotating shaft 12 is rotatably arranged on the body 11; the floating ring sealing runway 13 is sleeved on the rotating shaft 12, and the floating ring sealing runway 13 is fixedly arranged relative to the rotating shaft 12; the floating ring 10 is sleeved on the floating ring sealing runway 13, and the floating ring 10 is sleeved on the floating ring sealing runway 13.
In one embodiment, when the rotating shaft 12 rotates, the floating ring sealing track 13 rotates, and the floating ring 10 sleeved on the floating ring sealing track 13 also rotates along with the floating ring sealing track 13, after the rotating speed of the rotating shaft 12 reaches a certain speed, the floating ring 10 floats relative to the floating ring sealing track 13, and the displacement sensor 30 acquires the position information of the floating ring 10 in real time in the whole process.
In one embodiment, as shown in fig. 2 and 3, the floating ring monitoring system comprises a mounting base 20, an eddy current displacement sensor (displacement sensor 30), a floating ring seal test piece (floating ring 10), a sealing device shell 2, a clamping ring 14, a retainer ring 15, a wave spring 16, a gasket 17, a floating ring seal runway 13, a locking nut 18, a locking plate 19, a preamplifier 41 and a dynamic signal analyzer (collector 40). The floating ring seal is a single-stage floating ring seal, is tightly hooped on the floating ring seal runway 13 through a wave spring 16 and is connected in the shell 2; the floating ring sealing runway 13 is fixed on the rotating shaft 12 through a locking nut 18 and a locking plate 19 and rotates together with the rotating shaft 12; the eddy current displacement sensor is installed through a threaded hole in the installation seat 20, in order to enable the eddy current sensor to be located at the linear midpoint of a measurement range, a stainless steel sheet with the maximum gap thickness is inserted between a carbon graphite inner hole of a floating ring seal test piece and a floating ring seal runway 13, the position of the eddy current displacement sensor is adjusted by utilizing threads on the installation seat 20 by observing the gap voltage of the eddy current displacement sensor, so that the initial gap between a probe of the eddy current displacement sensor and the outer ring of the floating ring is located at the linear midpoint of the eddy current displacement sensor, the distances between the four eddy current displacement sensors and the outer ring of the floating ring are kept consistent, and then the stainless steel sheet is pulled out.
When the device works, a preamplifier 41 supplies high-frequency alternating current to the eddy current displacement sensor, the sensor outputs a high-frequency harmonic signal related to the distance, the signal is amplified, detected and filtered by the preamplifier to obtain an output voltage in direct proportion to the distance, and the output voltage is collected and recorded by a dynamic signal tester to obtain a real-time floating ring sealing gap value. The rotating speed signal is accessed into the dynamic signal tester, synchronous acquisition of the floating ring gap and the rotating speed is realized, and the floating rotating speed of the floating ring seal can be obtained by positioning the mutation point of the floating ring gap. The test result is shown in fig. 4, the sealing gap values of the floating ring measured by each eddy current displacement sensor are respectively a gap value 1, a gap value 2, a gap value 3 and a gap value 4, it can be seen from the graph that the gap values are suddenly changed at the same time at a certain moment, and the rotating speed at the moment is the floating rotating speed of the floating ring. One embodiment of the present invention provides a floating ring monitoring method, including: acquiring real-time position information of the floating ring 10, wherein the real-time position information is a harmonic signal; amplifying, detecting and filtering the harmonic signals to obtain output voltage in direct proportion to the distance; the output voltage is collected and recorded.
In one embodiment, a plurality of displacement sensors 30 are used to obtain a plurality of sets of real-time position information, and before obtaining the real-time position information of the floating ring 10, the floating ring monitoring method further includes adjusting the position of the displacement sensors 30, where adjusting the position of the displacement sensors 30 includes: inserting the thin sheet between the inner hole of the floating ring 10 and the floating ring sealing runway 13; adjusting the installation gap between each displacement sensor 30 and the floating ring 10 so that each displacement sensor 30 is installed at the linear midpoint of the measurement range; and (4) pulling out the thin sheet.
In one embodiment, the floating ring monitoring method further comprises: acquiring the real-time rotating speed of the rotating shaft 12, and synchronously acquiring the real-time position information and the real-time rotating speed so that the real-time position information corresponds to the real-time rotating speed; and determining a sudden change point in the real-time position information, wherein the rotating speed corresponding to the sudden change point is the rotating speed of the rotating shaft 12 for driving the floating ring 10 to float.
The floating ring monitoring device adopts the electric eddy current displacement sensor to measure the gap value of the floating ring in each direction and synchronously measure the rotating speed of the rotating shaft; and the floating rotation speed of the floating ring seal is obtained by positioning the abrupt change point of the floating ring gap. The invention fills the blank of aeroengine floating ring sealing gap and floating rotating speed measurement, and can obtain the change condition of the motion parameters of the floating ring such as eccentricity and eccentricity along with the rotating speed by synchronously measuring the gap values of the floating ring in four directions and the rotating speed of the rotating shaft in real time.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and exemplary embodiments be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (10)
1. A floating ring monitoring device, for monitoring a floating ring (10) of a floating ring seal mechanism (1), the floating ring monitoring device comprising:
the mounting seat (20), the said mounting seat (20) is set up on the sealing mechanism of the said floating ring (1);
a displacement sensor (30), wherein the displacement sensor (30) is arranged on the mounting seat (20), and a probe of the displacement sensor (30) faces the floating ring (10);
the collector (40) is in signal connection with the displacement sensor (30).
2. The floating ring monitoring device according to claim 1, wherein the mounting seat (20) is provided with a mounting hole (21), and the displacement sensor (30) passes through the mounting hole (21);
wherein the displacement sensor (30) is movably arranged relative to the mounting hole (21) to adjust the distance between the probe and the floating ring (10).
3. The floating ring monitoring device according to claim 2, wherein the mounting hole (21) is a threaded hole, and the displacement sensor (30) is threadedly connected to the mounting hole (21).
4. The floating ring monitoring device according to any one of claims 1 to 3, wherein the displacement sensor (30) is plural, and the plural displacement sensors (30) are provided on the mount (20) and are arranged at intervals in a circumferential direction of the floating ring (10).
5. The floating ring monitoring device of claim 1, further comprising:
a preamplifier (41), wherein the preamplifier (41) is in signal connection with the collector (40) and the displacement sensor (30).
6. The floating ring monitoring device according to claim 5, wherein the displacement sensor (30) is an eddy current displacement sensor, the collector (40) is a dynamic signal tester, the preamplifier (41) supplies alternating current to the eddy current displacement sensor, a harmonic signal output by the eddy current displacement sensor is amplified, detected and filtered by the preamplifier (41) to obtain an output voltage proportional to the distance, and the dynamic signal tester collects and records the output voltage.
7. A floating ring monitoring system, comprising the floating ring monitoring device of any one of claims 1 to 6 and a floating ring seal mechanism (1), the floating ring seal mechanism (1) comprising:
a body (11);
the rotating shaft (12), the said rotating shaft (12) is set up on the said body (11) rotatably;
the floating ring sealing runway (13) is sleeved on the rotating shaft (12), and the floating ring sealing runway (13) is fixedly arranged relative to the rotating shaft (12);
the floating ring (10) is sleeved on the floating ring sealing runway (13).
8. A floating ring monitoring method, comprising:
acquiring real-time position information of a floating ring (10), wherein the real-time position information is a harmonic signal;
amplifying, detecting and filtering the harmonic signal to obtain an output voltage in direct proportion to the distance;
and collecting and recording the output voltage.
9. The floating ring monitoring method of claim 8, wherein a plurality of sets of the real-time positional information are acquired simultaneously using a plurality of displacement sensors (30), the floating ring monitoring method further comprising adjusting the position of the displacement sensors (30) prior to acquiring the real-time positional information of the floating ring (10), the adjusting the position of the displacement sensors (30) comprising:
inserting a thin sheet between the inner hole of the floating ring (10) and a floating ring sealing runway (13);
adjusting the installation gap between each displacement sensor (30) and the floating ring (10) so that each displacement sensor (30) is installed at the linear midpoint of the measurement range of the displacement sensor;
and pulling out the thin sheet.
10. The floating ring monitoring method according to claim 8 or 9, further comprising:
acquiring the real-time rotating speed of a rotating shaft (12), and synchronously acquiring the real-time position information and the real-time rotating speed so as to enable the real-time position information to correspond to the real-time rotating speed;
and determining a mutation point in the real-time position information, wherein the rotating speed corresponding to the mutation point is the rotating speed of the rotating shaft (12) for driving the floating ring (10) to float.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010354666.2A CN111351421A (en) | 2020-04-29 | 2020-04-29 | Floating ring monitoring device, system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010354666.2A CN111351421A (en) | 2020-04-29 | 2020-04-29 | Floating ring monitoring device, system and method |
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| CN111351421A true CN111351421A (en) | 2020-06-30 |
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| CN202010354666.2A Pending CN111351421A (en) | 2020-04-29 | 2020-04-29 | Floating ring monitoring device, system and method |
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| CN113864457A (en) * | 2021-10-09 | 2021-12-31 | 中铁工程装备集团有限公司 | Main drive sealing system |
| KR20230010299A (en) * | 2021-07-12 | 2023-01-19 | 주식회사 모트롤 | Hydraulic drive with rotation speed measurement |
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Application publication date: 20200630 |