CN205679571U - A kind of cavitation visual exam device testing seal face exposure level - Google Patents
A kind of cavitation visual exam device testing seal face exposure level Download PDFInfo
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- CN205679571U CN205679571U CN201620469414.3U CN201620469414U CN205679571U CN 205679571 U CN205679571 U CN 205679571U CN 201620469414 U CN201620469414 U CN 201620469414U CN 205679571 U CN205679571 U CN 205679571U
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- seal
- cavitation
- ring
- exposure level
- face
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Abstract
The utility model relates to a kind of cavitation visual exam device testing seal face exposure level, belongs to hydrodynamic lubrication mechanical seal experimental provision field.It is characterized in that described device includes experimental stand, annular seal space, high-speed camera, drive system and test system.Annular seal space device includes main cavity and two set sealing devices (a set of experiment seals, a set of working seal), and seal includes rotating ring, stationary ring, spring, throw-out collar, O-ring and spring base；Driving means includes frequency modulation motor, shaft seating, rotating shaft, turns the tip of the axis and is connected with experiment seal rotating ring；Test device is piezoelectric ultrasonic transducer piece, and described transducer is all connected with described data acquisition test system.The utility model provides the benefit that the cavitation phenomenon that can intuitively observe lubricating liquid film, the exposure level of Accurate Determining non-contacting seal end face.
Description
Technical field
The utility model relates to a kind of cavitation visual exam device testing seal face exposure level, simple in construction,
Easy to operate, non-contact mechanical seal dynamic and static ring end contact degree accurately can be measured simultaneously, belong to hydrodynamic lubrication machine
Tool sealing experimental facility field.
Background technology
Mechanical seal is widely used in the rotating shaft of the equipment such as centrifugal pump, reactor, compressor.The company that plant equipment produces
Continuous property, has higher requirement to mechanical sealing performance.It is known that non-contact mechanical seal is to set on seal face
Put dynamic pressure groove, make to be formed between end face mould during work, keep the separation of dynamic and static ring end face, without fretting wear.But end face liquid
Film cavitation phenomenon extensively occurs, its mechanism of production and do not obtain abundant cognition to the affecting laws of sealing property, owing to sealing
End face fluid film generation cavitation or phase-state change, liquid film can not stable existence, seal face friction aggravation, be likely to result in sealing send out
Raw unstability lost efficacy.In the traditional mechanical seal experimental provision being currently known, (one) experiment seal is generally within annular seal space
Internal portion, does not select transparent material to make sealing ring, it is difficult to directly to observe simultaneously yet；(2) for sealed end facial mask
Thick measurement uses current vortex sensor mostly, is applied to monitor the relative position of seal face, and offer feeds back to control
System processed.This technology can detect end contact, but can not measure the exact level of end contact.
Utility model content
In consideration of it, the utility model provides a kind of brand-new open architecture test device, can facilitate, observe sky intuitively
Change phenomenon, analyze the mechanism of production of cavitation with this and be better understood by the impact on mechanical sealing performance for the cavitation effect.Piezoelectricity
Ultrasonic transducer is diagnosed the operating mode of seal interface by monitoring echo amplitude, it is judged that whether end face contacts, if it occur that connect
Touching, it then shows the degree of contact.
A kind of cavitation visual exam device testing seal face exposure level, including experimental stand, annular seal space, at a high speed
Video camera, drive system and test system, it is characterised in that: described annular seal space device includes that main cavity (16) and two sets seal
Device, is respectively experiment and seals (A) and working seal；Driving means includes frequency modulation motor (1), shaft seating (31) and rotating shaft
(10), turning the tip of the axis to be connected with experiment moving sealing ring (A4), described frequency modulation motor and described shaft seating are each attached to
On experimental stand；Test device be piezoelectric ultrasonic transducer piece (25), described transducer piece all with data acquisition test system
Connect.
Described annular seal space, is provided with front gland (20) and rear pressing cover (15), and wherein front gland design is ring-type, and centre is engraved
Empty circle adapts with stationary ring size, and beneficially light passes through；The upper and lower side of main cavity is respectively provided with entrance and the leak of medium,
Hole, medium inlet also can be used to measure sealing cavity temperature and pressure simultaneously.
Described experiment seals in (A), the outer survey in stationary ring (A7) position, is beneficial to observe cavitation effect；Rotating ring (A4) end face
On be carved with fluid dynamic pressure groove, rotating ring bottom surface is connected with the one end of spring (A3), and the other end of described spring is connected to just be positioned at it
On the spring base (A2) of lower section.
It can be four or six that described piezoelectric ultrasonic transducer piece (25) installs quantity, circumferentially in 90 ° or 60 ° of difference
It is fixedly mounted on corresponding position on experiment seal stationary ring outer wall, fit tightly with stationary ring (A7)；Described piezoelectric supersonic changes
Energy device generates the ultrasonic shear wave of principal component, launches to seal closure face direction；These ripples mainly reflect whether end face exists
Complete liquid film, if end contact, the sound wave just having part is transmitted over, causes the amplitude of back wave to reduce；Cross
Its end face closing force of contact of degree is bigger, and the amplitude causing back wave is less；In such a way, by monitoring back wave
Amplitude diagnoses the operating mode of seal interface, it is judged that whether end face contacts, if it occur that contact, then shows the degree of contact.
Described motor (1) is frequency control motor, can be changed the rotating speed of working-spindle by frequency converter, meet not
With the observation to liquid film seal cavitation effect under rotating speed, and contrast.
Described rotating ring, stationary ring, annular seal space main cavity and front gland all use transparent resin material to make, described height
The seal face that the dynamic and static ring of camera alignment of speed video camera is formed.
All described device axis are in same level position on experimental stand.
The good effect that the utility model has:
This experimental provision is a kind of horizontal cavitation visual exam device, and annular seal space Germicidal efficacy part uses transparent resin material
Material makes, and can observe the cavitation phenomenon of lubricating liquid film intuitively, easily.This experimental provision also can be compared with Accurate Determining seal face
Exposure level, be not only reside within judgement end face whether contact.
Brief description
Fig. 1 is experimental bench agent structure schematic diagram of the present utility model.
Fig. 2 is experiment seal configuration partial enlarged drawing of the present utility model.
Wherein, A1-rotating shaft, A2-spring base, A3-spring, A4-rotating ring, A5-O shape circle, A6-soket head cap screw and bolt,
A7-stationary ring, A8-piezoelectric ultrasonic transducer.
Detailed description of the invention
Below in conjunction with the detailed description of the invention of accompanying drawing illustrated embodiment, foregoing of the present utility model is remake further
Describe in detail.
Embodiment one
As shown in Figure 1 and Figure 2, a kind of cavitation visual exam equipment testing seal face exposure level, including experiment
Stand, annular seal space, high-speed camera, drive system and test system, it is characterised in that: described annular seal space device includes main chamber
Body (16) and two set sealing devices, be respectively experiment and seal (A) and working seal；Driving means includes frequency modulation motor (1), rotating shaft
Bearing (31) and rotating shaft (10), turn the tip of the axis and be connected with experiment moving sealing ring (A4), described frequency modulation motor and described turning
Shaft stool is each attached on experimental stand；Test device is piezoelectric ultrasonic transducer piece (25), described transducer piece all with several
Connect according to collecting test system.
Described annular seal space, is provided with front gland (20) and rear pressing cover (15), and wherein front gland design is ring-type, and centre is engraved
Empty circle adapts with stationary ring size, and beneficially light passes through；The upper and lower side of main cavity is respectively provided with entrance and the leak of medium,
Hole, medium inlet also can be used to measure sealing cavity temperature and pressure simultaneously.
Described experiment seals in (A), the outer survey in stationary ring (A7) position, is beneficial to observe cavitation effect；Rotating ring (A4) end face
On be carved with fluid dynamic pressure groove, rotating ring bottom surface is connected with the one end of spring (A3), and the other end of described spring is connected to just be positioned at it
On the spring base (A2) of lower section.
It can be four or six that described piezoelectric ultrasonic transducer piece (25) installs quantity, circumferentially in 90 ° or 60 ° of difference
It is fixedly mounted on corresponding position on experiment seal stationary ring outer wall, fit tightly with stationary ring (A7)；Described piezoelectric supersonic changes
Energy device generates the ultrasonic shear wave of principal component, launches to sealing contact surface direction；These ripples mainly reflect whether end face exists
Complete liquid film, if end contact, the sound wave just having part is transmitted over, causes the amplitude of back wave to reduce；Cross
Its end face closing force of contact of degree is bigger, and the amplitude causing back wave is less；In such a way, shaken by monitoring back wave
Width diagnoses the operating mode of seal interface, it is judged that whether end face contacts, if it occur that contact, then shows the degree of contact.
Described motor (1) is frequency control motor, can be changed the rotating speed of working-spindle by frequency converter, meet not
With the observation to liquid film seal cavitation effect under rotating speed, and contrast.
Described rotating ring, stationary ring, annular seal space main cavity and front gland all use transparent resin material to make, described height
The seal face that the dynamic and static ring of camera alignment of speed video camera is formed.
All described device axis are in same level position on experimental stand.
Content described in this specification embodiment is only enumerating of the way of realization to utility model design, and this practicality is new
The protection domain of type is not construed as being only limitted to above-mentioned stated instantiation, without departing from the above-mentioned technological thought of the present invention
In the case of, the various replacement made according to ordinary skill knowledge and customary means or change, all should include at this
In bright scope.
Claims (7)
1. can test a cavitation visual exam device for seal face exposure level, including experimental stand, annular seal space, high speed are taken the photograph
Camera, drive system and test system, it is characterised in that: described annular seal space device includes that main cavity (16) and two sets seal dress
Put, be respectively experiment and seal (A) and working seal；Driving means includes frequency modulation motor (1), shaft seating (31) and rotating shaft
(10), turning the tip of the axis to be connected with experiment moving sealing ring (A4), described frequency modulation motor and described shaft seating are each attached to
On experimental stand；Test device be piezoelectric ultrasonic transducer piece (25), described transducer piece all with data acquisition test system
Connect.
2. a kind of cavitation visual exam device testing seal face exposure level according to claim 1, its feature
Being: described annular seal space, being provided with front gland (20) and rear pressing cover (15), wherein front gland design is ring-type, middle hollow out
Circle adapt with stationary ring size, beneficially light passes through；The upper and lower side of main cavity is respectively provided with entrance and the leak of medium, with
When hole, medium inlet also can be used to measure sealing cavity temperature and pressure.
3. a kind of cavitation visual exam device testing seal face exposure level according to claim 1, its feature
It is: described experiment seals in (A), the outer survey in stationary ring (A7) position, be beneficial to observe cavitation effect；Carve on rotating ring (A4) end face
Having fluid dynamic pressure groove, rotating ring bottom surface is connected with the one end of spring (A3), and the other end of described spring is connected to be positioned at immediately below it
Spring base (A2) on.
4. a kind of cavitation visual exam device testing seal face exposure level according to claim 1, its feature
Be: it can be four or six that described piezoelectric ultrasonic transducer piece (25) installs quantity, circumferentially in 90 ° or 60 ° solid respectively
Dingan County is contained in corresponding position on experiment seal stationary ring outer wall, fits tightly with stationary ring (A7)；Described piezoelectric supersonic transducing
Device generates the ultrasonic shear wave of principal component, launches to seal closure face direction；These ripples mainly reflect whether end face has existed
Whole liquid film, if end contact, the sound wave just having part is transmitted over, causes the amplitude of back wave to reduce；Excessive
Its end face closing force of contact bigger, the amplitude causing back wave is less；In such a way, by monitoring echo amplitude
Diagnose the operating mode of seal interface, it is judged that whether end face contacts, if it occur that contact, then show the degree of contact.
5. a kind of cavitation visual exam device testing seal face exposure level according to claim 1, its feature
It is: described motor (1) is frequency control motor, can be changed the rotating speed of working-spindle by frequency converter, meet in difference
Observation to liquid film seal cavitation effect under rotating speed, and contrast.
6. a kind of cavitation visual exam device testing seal face exposure level according to claim 1, its feature
It is: described rotating ring, stationary ring, annular seal space main cavity and front gland all use transparent resin material to make, described high speed
The seal face that the dynamic and static ring of camera alignment of video camera is formed.
7. a kind of cavitation visual exam device testing seal face exposure level according to claim 1, its feature
It is: all described device axis are in same level position on experimental stand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620469414.3U CN205679571U (en) | 2016-05-20 | 2016-05-20 | A kind of cavitation visual exam device testing seal face exposure level |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620469414.3U CN205679571U (en) | 2016-05-20 | 2016-05-20 | A kind of cavitation visual exam device testing seal face exposure level |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205679571U true CN205679571U (en) | 2016-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620469414.3U Expired - Fee Related CN205679571U (en) | 2016-05-20 | 2016-05-20 | A kind of cavitation visual exam device testing seal face exposure level |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107702867A (en) * | 2017-10-24 | 2018-02-16 | 中国地质大学（北京） | Micro-leakage test paper and preparation method thereof and method of testing, the sealing device with micro-leakage test function |
| CN108592798A (en) * | 2018-04-08 | 2018-09-28 | 南京航空航天大学 | A kind of rotating shaft lip-shaped sealing part contact surface measurement method and device |
| CN109405775A (en) * | 2018-09-19 | 2019-03-01 | 西安理工大学 | A kind of detection device that the sealing of contact analog mechanical is distributed with lubricating film |
| CN112113496A (en) * | 2020-09-10 | 2020-12-22 | 浙江工业大学 | Test bench for measuring end face film thickness and film pressure of sealing device |
| CN113944757A (en) * | 2021-09-29 | 2022-01-18 | 浙江工业大学 | Mechanical seal interface fluid film forming measurement and control system |
-
2016
- 2016-05-20 CN CN201620469414.3U patent/CN205679571U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107702867A (en) * | 2017-10-24 | 2018-02-16 | 中国地质大学（北京） | Micro-leakage test paper and preparation method thereof and method of testing, the sealing device with micro-leakage test function |
| CN108592798A (en) * | 2018-04-08 | 2018-09-28 | 南京航空航天大学 | A kind of rotating shaft lip-shaped sealing part contact surface measurement method and device |
| CN109405775A (en) * | 2018-09-19 | 2019-03-01 | 西安理工大学 | A kind of detection device that the sealing of contact analog mechanical is distributed with lubricating film |
| CN112113496A (en) * | 2020-09-10 | 2020-12-22 | 浙江工业大学 | Test bench for measuring end face film thickness and film pressure of sealing device |
| CN112113496B (en) * | 2020-09-10 | 2024-06-07 | 浙江工业大学 | Test bed for measuring end face film thickness and film pressure of sealing device |
| CN113944757A (en) * | 2021-09-29 | 2022-01-18 | 浙江工业大学 | Mechanical seal interface fluid film forming measurement and control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161109 Termination date: 20170520 |