CN209745740U - Contact type mechanical seal end surface abrasion loss measuring device - Google Patents
Contact type mechanical seal end surface abrasion loss measuring device Download PDFInfo
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- CN209745740U CN209745740U CN201920526966.7U CN201920526966U CN209745740U CN 209745740 U CN209745740 U CN 209745740U CN 201920526966 U CN201920526966 U CN 201920526966U CN 209745740 U CN209745740 U CN 209745740U
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- displacement sensor
- ring
- mechanical seal
- gland
- optical fiber
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Abstract
The utility model relates to a measuring device, especially a contact mechanical seal terminal surface wearing and tearing measuring device, by axle, sealed chamber, rotating ring, quiet ring, throw-out collar, spring, gland, optic fibre displacement sensor I, optic fibre displacement sensor II, reflection paper etc. constitute, the rotating ring is fixed on the axle sleeve, the reflection paper is pasted on the rotating ring, the throw-out collar is connected with quiet ring, quiet ring installation is on the gland, optic fibre displacement sensor I arranges the throw-out collar on the gland at the back, optic fibre displacement sensor II arranges on the gland, keeps the certain distance with the reflection paper. The utility model discloses beneficial effect: compared with the traditional contact type mechanical seal abrasion loss measuring method, the measuring precision and accuracy can be ensured by using the optical fiber displacement sensor for measurement, the device can measure the abrasion loss of the end face of the contact type mechanical seal without stopping, the real-time and on-line monitoring of the abrasion loss of the end face of the contact type mechanical seal can be realized, and the practicability is very high.
Description
Technical Field
The utility model relates to a contact mechanical seal terminal surface wearing and tearing volume measuring device belongs to fluid dynamic seal experimental apparatus field.
Background
The mechanical seal is a shaft seal device of rotating machinery, and is widely applied to the fields of aerospace, petrochemical industry and the like because of the advantages of small leakage amount, long service life and the like. The abrasion loss is one of important parameters for embodying the sealing performance of the end face of the mechanical seal, and for the contact type mechanical seal, the occurrence of abrasion can lead to the thinning of the sealing ring, so that the leakage amount is increased, meanwhile, the frictional heat generated by abrasion can also lead to the thermal deformation of the sealing ring, and the sealing can fail in case of serious abrasion, so that the measurement of the abrasion loss of the end face of the mechanical seal is of great significance. The existing mechanical seal end surface abrasion amount testing method mainly comprises a micrometer measuring method and a weighing method, although the method can obtain the abrasion amount, the method has large error and low efficiency, can be used for measuring only by stopping the machine, cannot realize real-time and on-line monitoring, and has poor experimental universality.
SUMMERY OF THE UTILITY MODEL
For solving above-mentioned problem, this paper provides a contact mechanical seal terminal surface wearing and tearing volume measuring device, through optic fibre displacement sensor measurement contact mechanical seal move, quiet ring axial displacement volume, can be comparatively accurate quiet wearing and tearing volume of ring, the device only needs the installation the gland of structure does not have special requirement to whole frock, and the device need not shut down just can measure, can realize the real-time, the on-line monitoring of contact mechanical seal terminal surface wearing and tearing volume, has very strong practicality. The technical scheme is as follows:
The utility model provides a contact mechanical seal terminal surface wearing capacity measuring device which characterized in that: the optical fiber displacement sensor comprises an O-shaped ring, a shaft sleeve, a locking nut, a shaft, a sealing cavity, a gland, an inner hexagonal socket head cap screw, a clamping ring, an optical fiber displacement sensor, a spring, a static ring, a push ring, a movable ring and reflection paper, wherein the gland is connected with the sealing cavity through the inner hexagonal socket head cap screw, the clamping ring is fixed on the gland, the left side of the movable ring is connected with the shaft sleeve, the right side of the movable ring is in contact with the left side of the static ring, the left side of the push ring is in contact with the right side of the static ring, the right side of the push ring is connected with the left side of the spring, the right side of the spring is in contact with the gland, the reflection paper is pasted on the movable ring, the optical fiber displacement sensor I is arranged on the gland, the left side of the optical fiber displacement sensor is kept at a distance of 300-900 mu m from the push ring.
The utility model has the advantages that:
(1) Compared with the traditional contact type mechanical seal abrasion loss measuring method (micrometer measuring method and weighing method), the method for measuring the abrasion loss by using the optical fiber displacement sensor can ensure the measuring precision and accuracy.
(2) The device can measure without stopping the machine, can realize the real-time and on-line monitoring of the abrasion loss of the end surface of the contact type mechanical seal, and has strong practicability.
(3) the device can avoid the error that the rotating ring, quiet ring axial vibration brought to measure the wearing and tearing volume of quiet ring comparatively accurately.
(4) Two optical fiber displacement sensors are all arranged at the upper half part of the gland, so that the experimental medium can be prevented from leaking at the sensors.
(5) The device only needs to install the gland of the structure, and has no special requirements on the whole tool.
Drawings
FIG. 1: a structure schematic diagram of a contact type mechanical seal end surface abrasion loss measuring device.
Description of the symbols:
the device comprises an O-shaped ring I, an O-shaped shaft sleeve 2, a locking nut 3, a shaft 4, a sealing cavity 5, a gland 6, an inner hexagonal socket head screw 7, an O-shaped ring II, a snap ring 9, an O-shaped ring III 10, an optical fiber displacement sensor I, an O-shaped ring IV 12, a spring 13, a spring 14, a static ring 15, a push ring 16, an optical fiber displacement sensor II, an optical fiber displacement sensor 17, a movable ring 18 and reflection paper 18.
Detailed Description
The invention will be further described with reference to the following figures and examples:
as shown in fig. 1, a contact mechanical seal end surface wear amount measuring device is characterized in that: comprises O-shaped rings (1, 8, 10, 12), a shaft sleeve (2), a locking nut (3), a shaft (4), a sealing cavity (5), a gland (6), an inner hexagonal socket head cap screw (7), a clamping ring (9), optical fiber displacement sensors (11, 16), a spring (13), a static ring (14), a push ring (15), a movable ring (17) and reflective paper (18), wherein the gland (6) is connected with the sealing cavity (5) through the inner hexagonal socket head cap screw (7), the clamping ring (9) is fixed on the gland (6), the left side of the movable ring (17) is connected with the shaft sleeve (2), the right side of the movable ring is contacted with the left side of the static ring (14), the left side of the push ring (15) is connected with the right side of the static ring (14), the right side of the push ring is connected with the left side of the spring (13), the right side of the spring (13) is contacted with the gland (6), the reflective paper (18) is attached to the movable ring (17), and the optical fiber displacement sensors I, the left side of the optical fiber displacement sensor II is 300-900 mu m away from the push ring (15), the right side of the optical fiber displacement sensor II is arranged on the outer side of the gland (6), the left side of the optical fiber displacement sensor II is 300-900 mu m away from the reflection paper (18) on the movable ring (17), and the right side of the optical fiber displacement sensor II is arranged on the outer side of the gland (6).
Be equipped with an annular channel of placing snap ring (9) on gland (6), be equipped with the annular channel of placing O type circle II (8) and O type circle III (10) respectively on gland (6), be equipped with an annular channel of placing O type circle I (1), O type circle IV (12) on axle sleeve (2), rotating ring (17) respectively.
In the experimental device, the optical fiber displacement sensor I (11) and the optical fiber displacement sensor II (16) are both arranged at the upper half part of the gland (6), so that sealing media cannot leak at the sensors; at the initial moment, a fluid medium is introduced into the sealed cavity (10), the shaft (4) is in a static state, the optical fiber displacement sensor I (11) measures the distance x1 from the sensor probe to the push ring (15) under static pressure, and the optical fiber displacement sensor II (16) measures the distance x2 from the sensor probe to the reflective paper (18) under static pressure; when the shaft (4) starts to rotate and runs stably, the optical fiber displacement sensor I (11) measures the distance x11 between the sensor probe and the push ring (15), and the optical fiber displacement sensor II (16) measures the distance x22 between the sensor probe and the reflective paper (18) under dynamic pressure; the difference delta x1 between x1 and x11 is the axial displacement of the static ring (14), the difference delta x2 between x2 and x22 is the axial vibration of the dynamic ring (17), and the difference delta x1 and delta x2 is the end surface abrasion of the static ring (14); the device can avoid errors caused by axial vibration of the movable ring (17) and the static ring (14), and accurately measure the abrasion loss of the static ring (14); the device only needs to install the gland (6) of the structure, and has no special requirements on the whole tool; the device can measure the abrasion loss of the end face of the contact type mechanical seal without stopping, can realize real-time and on-line monitoring of the abrasion loss of the end face of the contact type mechanical seal, and has strong practicability.
The device can also be along pushing away ring and rotating ring, and four optic fibre displacement sensor are evenly arranged to each circumference, measure the size between the displacement volume through comparing each sensor, can master the skew condition of each sealing ring respectively to be convenient for to the dynamic characteristic research of moving, quiet ring.
The description is only an example of the implementation of the inventive concept, the invention is not limited to the above-mentioned embodiments, and any simulation or deformation according to the invention is within the scope of the invention.
Claims (4)
1. The utility model provides a contact mechanical seal terminal surface wearing capacity measuring device which characterized in that: the optical fiber displacement sensor comprises a gland (6), optical fiber displacement sensors (11 and 16), a spring (13), a stationary ring (14), a push ring (15), a movable ring (17) and reflection paper (18), wherein the left side of the movable ring (17) is connected with a shaft sleeve (2), the right side of the movable ring is in contact with the left side of the stationary ring (14), the reflection paper (18) is attached to the movable ring (17), the optical fiber displacement sensor I (11) is arranged on the gland (6), the left side of the optical fiber displacement sensor keeps a distance of 300-900 mu m with the push ring (15), the right side of the optical fiber displacement sensor is arranged on the outer side of the gland (6), the left side of the optical fiber displacement sensor II (16) keeps a distance of 300-900 mu m with the reflection paper (18) on the movable ring (17), and the right side of the optical fiber displacement.
2. The contact type mechanical seal end surface wear amount measuring device according to claim 1, wherein: the optical fiber displacement sensor I (11) is arranged on the gland (6), and a sensor probe of the optical fiber displacement sensor I keeps a distance of 300-900 mu m from the push ring (15).
3. The contact type mechanical seal end surface wear amount measuring device according to claim 1, wherein: the optical fiber displacement sensor II (16) is arranged on the gland (6), and the sensor probe and the reflecting paper (18) keep a distance of 300-900 mu m.
4. The contact type mechanical seal end surface wear amount measuring device according to claim 1, wherein: the reflective paper (18) is arranged on the movable ring (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920526966.7U CN209745740U (en) | 2019-04-17 | 2019-04-17 | Contact type mechanical seal end surface abrasion loss measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920526966.7U CN209745740U (en) | 2019-04-17 | 2019-04-17 | Contact type mechanical seal end surface abrasion loss measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209745740U true CN209745740U (en) | 2019-12-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920526966.7U Expired - Fee Related CN209745740U (en) | 2019-04-17 | 2019-04-17 | Contact type mechanical seal end surface abrasion loss measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209745740U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022143029A1 (en) * | 2020-12-30 | 2022-07-07 | 清华大学 | Mechanical sealing device capable of monitoring amount of wear |
-
2019
- 2019-04-17 CN CN201920526966.7U patent/CN209745740U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022143029A1 (en) * | 2020-12-30 | 2022-07-07 | 清华大学 | Mechanical sealing device capable of monitoring amount of wear |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191206 Termination date: 20200417 |
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| CF01 | Termination of patent right due to non-payment of annual fee |