CN107387774A - A kind of adaptive dry gas seals system regulated and controled online based on spring pressure - Google Patents
A kind of adaptive dry gas seals system regulated and controled online based on spring pressure Download PDFInfo
- Publication number
- CN107387774A CN107387774A CN201710747282.5A CN201710747282A CN107387774A CN 107387774 A CN107387774 A CN 107387774A CN 201710747282 A CN201710747282 A CN 201710747282A CN 107387774 A CN107387774 A CN 107387774A
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- Prior art keywords
- spring
- dry gas
- ring
- rotating
- pressure
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
Abstract
A kind of adaptive dry gas seals system regulated and controled online based on spring pressure, including dry gas sealing device and the online regulator control system of spring pressure.The dry gas sealing device includes stationary ring, rotating ring, rotating seat, snap ring and the machine case and sealing gland of dry gas seals；The online regulator control system of spring pressure includes main frame, measurement component, sampling memory, standard database, comparator, controller and elastic force actuating system, the elastic force actuating system includes executing agency, servomotor, servo motor seat, push rod, spring base, spring and throw-out collar, and the measurement component includes tachometer of measuring, flowmeter and pressure sensor.The sealing rotating speed measured, pressure input standard database are obtained corresponding slip limiting value by the online regulator control system of spring pressure, and through comparator compared with the slip that flowmeter is surveyed, again signal is provided through main frame, excitation and control servomotor, change the elastic force of spring until controlling actual slip to be less than slip limiting value.
Description
Technical field
The invention belongs to dry gas seals field, be related to it is a kind of be used to sealing dry gas based on the adaptive dry gas regulated and controled online
Sealing system, it disclosure satisfy that including rotating machinery long period safe operation in the industry such as oil, chemical industry, nuclear energy, space flight and aviation
It is required that the particularly gland seal device of the high-speed rotating equipment such as compressor.
Background technology
With China " West-east Gas implementation, its nucleus equipment -- the reliability and stability of pipeline compressor by
To increasing concern, and the sealing problem of its key position has become the key content of many scholar's research.Dry gas is close
Envelope has the excellent specific properties such as low leakage, low friction power consumption, but still the fluctuation of service under variable working condition environment be present and even fail
The problem of.
Mechanical seal design point stable operation at present, when operating mode changes, such as variable working condition such as rotating speed, pressure oscillations
When situation occurs, then seal failure is may result in；With the high speed development of industry, the work of mechanical seal tends to high temperature, height
Speed and high pressure, once there is seal failure, the energy and material are not only wasted, and pollute environment, or even caused casualties
Harm；It is also inevitable with the extension in the industrial operation cycle such as oil, chemical industry, nuclear energy, Aero-Space and the attention to safety and environmental protection
It is required that the operation of long period safety is capable of in mechanical seal.
Domestic Peng Xu east et al. proposes controllable mechanical sealing thought, it is indicated that design one kind can control opening force or closing force,
And then the mechanically-sealing apparatus of thickness is controlled to have far-reaching significance；Salant R F and Wolff P etc., Heilala J etc.,
Etsion Z etc., Zou M etc. using by realizing the control to sealing to the monitoring of End Face Temperature Rise, determines that closing force is corresponding
Liquid film physical dimension, obtained sealing ring end face temperature and slip.Temperature on the inside of stationary ring and slip are joined as feedback
Number, closing force establish the control method that screw machine seals as adjustment parameter.According to this method, with reference to feedback, machine is adjusted
Tool system, the controllable operation of Spiral Groove Mechanical Seal can be achieved, energy is adapted to so as to improve the variable working condition of Spiral Groove Mechanical Seal；
The controllable mechanical sealing device of the developments such as the R.F.Salant in the U.S. and automatically controlled double mechanical seal, using end face temperature as instead
Feedback signal, its controllable sealing device are made up of the actuator set after rotating ring, stationary ring and stationary ring with temperature sensor, actuator
Apply axial force at the stationary ring back side, force stationary ring areal deformation, convergence gap is formed between sealing surfaces, input voltage is got over
Height, the degree of convergence of acquisition is bigger, and the liquid film between sealing surface is thicker, and vice versa, is finally reached regulation thickness, ensures sealing
Can and it improve sealing life.However, what degree is the degree of convergence impasse between sealing surface should be controlled in, it is still to annoying many
The problem of person.A.L.Millor etc. have developed the Adaptable System of mechanically-sealing apparatus；State's inland cutting edge of a knife or a sword et al. proposes to be based on
The design of TMS320F2812 mechanical seal monitoring system.
So far, the research both at home and abroad to controllable mechanical sealing is concentrated mainly on mechanical seal parameter detecting and single knot
The development of structure parameter control system, and major part needs manual operation, is not to carry out automatically.The intelligent level of its system is low,
Control effect lags, and adaptive ability is poor, it is impossible to changing rule of the mechanical seal within a period of time is made it is correctly predicted from
And realize intelligent control.
The content of the invention
The present invention will overcome the disadvantages mentioned above of prior art, there is provided a kind of based on the adaptive dry gas seals system regulated and controled online
System, can much solve the problems, such as that mechanical seal is intelligent low in degree.
A kind of adaptive dry gas seals system regulated and controled online based on spring pressure provided by the invention, including dry gas seals
Device and the online regulator control system of spring pressure.The dry gas sealing device includes stationary ring 9, rotating ring 11, the rotating seat of dry gas seals
12nd, snap ring 10 and machine case 1 and sealing gland 2；The rotating seat 12 is fixed in rotating shaft by holding screw, described dynamic
Ring 11 is axially fixed on the rotating seat 12 by the way that trundle is circumferentially positioned on the rotating seat 12 and by snap ring 10；Institute
State in rotating ring 11 or stationary ring 9 and process dynamic pressure groove at least one seal face；The sealing gland 2 passes through bolt and the machine
Device housing 1 is connected.The online regulator control system of spring pressure includes main frame 111, measurement component, sampling memory, standard
Database 119, comparator 118, controller 112 and elastic force actuating system；The elastic force actuating system is installed on the stationary ring 9 and carried on the back
Portion, the elastic force actuating system include executing agency 116, servomotor 4, servo motor seat 3, push rod 5, spring base 6, spring 7
With throw-out collar 8；The push rod 5 may be axially movable under the driving effect of the servomotor 4, and drive the spring base 6 to be made
It is axially moved and compression spring changes elastic force, therefore changes the stationary ring and the spring pressure in rotating ring contact face；The bullet
Spring abutment 6 is piston cylinder operator, and O-ring seals are provided between the sealing gland 2；
The measurement component includes tachometer of measuring 114, flowmeter 115 and pressure sensor 121；Tachometer of measuring
114 are arranged on the outside of the shaft end of machine at nearly rotating shaft surface, and its output end connects the first sampling memory 113, and the first sampling is deposited
Reservoir 113 connects standard database 119；Pressure sensor 121 is arranged on buffering gas or isolation gas enters by machine case and pressure
Cover in the air delivering pipeline of the annular seal space of composition, its output end connects the 3rd sampling memory 120, and the 3rd sampling memory 120 connects
Connect standard database 119；Flowmeter 115 is arranged on outside machine shaft end at sealing medium leak outlet, and its output end connects
Connect the second sampling memory 117, the second sampling memory 117 connection comparator 118；The output end connection main frame of comparator 118
111, the output end of main frame 111, controller 118, executing agency 116, servomotor 4 are sequentially connected；The tachometer of measuring 114
The seal pressure that the rotating ring rotating speed and the pressure sensor 121 measured measures inputs the standard database 119 and obtained correspondingly
Slip limiting value, and compared with surveying the slip obtained through the comparator 118 and the flowmeter 115, then pass through
The main frame 111 sends signal to the elastic force actuating system, encourages and control the servomotor 4, changes the spring 7
Elastic force is until control actual slip to be less than slip limiting value.
A kind of adaptive dry gas seals system concrete principle such as Fig. 2 institutes regulated and controled online based on spring pressure in the present invention
Show：
Spring (7) keeps contacting and unstressed state with throw-out collar (8) before dry gas sealing device start-up time.Sealed end
The principle of the unlatching in face is the hydrodynamic lubrication effect caused by seal face after device brings into operation, and passes through hydrodynamic lubrication effect
Open seal face, control system measures official website nitrogen pressure p, tachometer of measuring by pressure sensor (121) therewith
(114) rotating shaft rotating speed n is measured, transmits and target film thickness h is obtained into standard database (119)0Under the conditions of the leakage of the corresponding limit
Rate Q0；Actual slip Q is measured by flowmeter (115), transmitted into comparator (118) and Q0It is compared.By actually letting out
Difference between leak rate and limit slip, corresponding Thickness Variation amount Δ h is obtained, according to opening force/closing force F's and thickness h
Relational expression, corresponding closing force regulated quantity Δ F can be obtained.According to the relational expression between closing force F and amount of spring compression Δ x, with
And the relational expression between amount of spring compression Δ x and servomotor (4) corner Δ θ, spring in the process of running can be calculated and adjusted
Whole decrement Δ x and required motor corner Δ θ.
The present invention is had the advantages that：
By the sensor technology in informationization technology, telecommunication and transmission technology, networks and databank technology and from
Dynamic control technology etc. is incorporated into the thickness Intelligentized regulating and controlling of the defeated compressor dry gas seals of pipe, is developed a kind of new adaptive
Dry gas seals system, to solve the problems, such as the frequent failure of the defeated compressor dry gas seals of current natural gas tube.Propose spring pressure
Intelligent regulating device, controlled by the amount of spring compression in sealing device running, finally realized to seal closure power
Intelligent control.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Fig. 2 operation logic schematic diagrames of the present invention.
Embodiment
Technical scheme is further illustrated below in conjunction with the accompanying drawings.
A kind of adaptive dry gas seals system regulated and controled online based on spring pressure of the present invention, including dry gas sealing device
With the online regulator control system of spring pressure.The dry gas sealing device includes stationary ring 9, rotating ring 11, rotating seat 12, the card of dry gas seals
Ring 10 and machine case 1 and sealing gland 2；The rotating seat 12 is fixed in rotating shaft by holding screw, the rotating ring 11
It is axially fixed in by the way that trundle is circumferentially positioned on the rotating seat 12 and by snap ring 10 on the rotating seat 12；It is described dynamic
In ring 11 or stationary ring 9 dynamic pressure groove is processed at least one seal face；The sealing gland 2 passes through bolt and the machine shell
Body 1 is connected.The online regulator control system of spring pressure includes main frame 111, measurement component, sampling memory, normal data
Storehouse 119, comparator 118, controller 112 and elastic force actuating system；The elastic force actuating system is installed on the back of stationary ring 9,
The elastic force actuating system includes executing agency 116, servomotor 4, servo motor seat 3, push rod 5, spring base 6, spring 7 and pushed away
Ring 8；The push rod 5 may be axially movable under the driving effect of the servomotor 4, and drive the spring base 6 to make axial direction
Motion and compression spring change elastic force, therefore change the stationary ring and the spring pressure in rotating ring contact face；The spring base 6
For piston cylinder operator, and O-ring seals are provided between the sealing gland 2；
The measurement component includes tachometer of measuring 114, flowmeter 115 and pressure sensor 121.Tachometer of measuring
114 are arranged on the outside of the shaft end of machine at nearly rotating shaft surface, and its output end connects the first sampling memory 113, and the first sampling is deposited
Reservoir 113 connects standard database 119；Pressure sensor 121 is arranged on buffering gas or isolation gas enters by machine case and pressure
Cover in the air delivering pipeline of the annular seal space of composition, its output end connects the 3rd sampling memory 120, and the 3rd sampling memory 120 connects
Connect standard database 119；Flowmeter 115 is arranged on outside machine shaft end at sealing medium leak outlet, and its output end connects
Connect the second sampling memory 117, the second sampling memory 117 connection comparator 118；The output end connection main frame of comparator 118
111, the output end of main frame 111, controller 118, executing agency 116, servomotor 4 are sequentially connected；Tachometer of measuring 114 measures
Rotating ring rotating speed and the seal pressure that measures of the pressure sensor 121 input the standard database 119 obtain corresponding to let out
Leak rate limiting value, and through the comparator 118 compared with the slip that the flowmeter 115 surveys acquisition, then through described
Main frame 111 sends signal to the elastic force actuating system, encourages and control the servomotor 4, changes the elastic force of the spring 7
Until actual slip is controlled to be less than slip limiting value.
A kind of adaptive dry gas seals system concrete principle such as Fig. 2 institutes regulated and controled online based on spring pressure in the present invention
Show.
The means that the unlatching of seal face uses are hydrodynamic lubrication effects, spring keeps contact condition with throw-out collar, but now
Spring force be zero.After dry gas sealing device brings into operation, official website nitrogen pressure p, rotating speed are measured by pressure sensor
Rotating shaft rotating speed n is measured to obtain, transmits into database and obtains target film thickness h0Under the conditions of corresponding standard leak rate Q0；Pass through flow
Actual slip Q is measured to obtain, is transmitted into comparator and Q0It is compared.By between actual slip and standard leak rate
Difference, corresponding Thickness Variation amount Δ h is obtained, according to opening force/closing force F and thickness h relational expression, corresponding closure can be obtained
Power regulated quantity Δ F.According to the relational expression between closing force F and amount of spring compression Δ x, and amount of spring compression Δ x and spring ratio
Relational expression between voltage-controlled servomotor corner Δ θ processed, required motor corner Δ θ can be calculated.
Content described in this specification embodiment is only enumerating to the way of realization of inventive concept, protection model of the invention
Enclose and be not construed as being only limitted to the concrete form that embodiment is stated, protection scope of the present invention also includes people in the art
Member according to present inventive concept it is conceivable that equivalent technologies mean.
Claims (1)
1. a kind of adaptive dry gas seals system regulated and controled online based on spring pressure, including dry gas sealing device and spring pressure
Online regulator control system.The dry gas sealing device includes stationary ring (9), rotating ring (11), rotating seat (12), the snap ring of dry gas seals
And machine case (1) and sealing gland (2) (10)；The rotating seat (12) is fixed in rotating shaft by holding screw, described
Rotating ring (11) is circumferentially positioned in being axially fixed in the rotating ring on the rotating seat (12) and by snap ring (10) by trundle
On seat (12)；In the rotating ring (11) or stationary ring (9) dynamic pressure groove is processed at least one seal face；The sealing gland
(2) it is connected by bolt with the machine case (1).The online regulator control system of spring pressure includes main frame (111), measurement
Component, sampling memory, standard database (119), comparator (118), controller (112) and elastic force actuating system；It is described
Elastic force actuating system is installed on the stationary ring (9) back, and the elastic force actuating system includes executing agency (116), servomotor
(4), servo motor seat (3), push rod (5), spring base (6), spring (7) and throw-out collar (8)；Driving in the servomotor (4)
The push rod (5) may be axially movable under effect, and drive the spring base (6) axially move and compression spring change bullet
Power, therefore change the stationary ring and the spring pressure in rotating ring contact face；The spring base (6) is piston cylinder operator, and with
O-ring seals are provided between the sealing gland (2)；
The measurement component includes tachometer of measuring (114), flowmeter (115) and pressure sensor (121)；Tachometer of measuring
(114) it is arranged on the outside of the shaft end of machine at nearly rotating shaft surface, its output end connects the first sampling memory (113), and first adopts
Sample memory (113) connection standard database (119)；Pressure sensor (121) is arranged on buffering gas or isolation gas enters by machine
In the air delivering pipeline of the annular seal space of device housing and gland composition, its output end connects the 3rd sampling memory (120), the 3rd sampling
Memory (120) connection standard database (119)；Flowmeter (115) is arranged on outside machine shaft end and leaked close to sealing medium
Exit, its output end connect the second sampling memory (117), the second sampling memory (117) connection comparator (118)；Than
Compared with the output end connection main frame (111) of device (118), the output end of main frame (111), controller (118), executing agency (116), watch
Motor (4) is taken to be sequentially connected；The rotating ring rotating speed and the pressure sensor (121) that the tachometer of measuring (114) measures measure
Seal pressure input the standard database (119) obtain corresponding to slip limiting value, and through the comparator (118) with
The slip that flowmeter (115) actual measurement obtains is compared, then is sent out through the main frame (111) to the elastic force actuating system
Go out signal, encourage and control the servomotor (4), change the elastic force of the spring (7) until controlling actual slip to be less than
Slip limiting value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710747282.5A CN107387774A (en) | 2017-08-28 | 2017-08-28 | A kind of adaptive dry gas seals system regulated and controled online based on spring pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710747282.5A CN107387774A (en) | 2017-08-28 | 2017-08-28 | A kind of adaptive dry gas seals system regulated and controled online based on spring pressure |
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| CN107387774A true CN107387774A (en) | 2017-11-24 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710747282.5A Pending CN107387774A (en) | 2017-08-28 | 2017-08-28 | A kind of adaptive dry gas seals system regulated and controled online based on spring pressure |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108050251A (en) * | 2017-12-06 | 2018-05-18 | 南通范氏机械有限公司 | Air sac sealing type vacuum kneader |
| CN108506493A (en) * | 2018-04-23 | 2018-09-07 | 西安交通大学 | It is a kind of can auto-control gap dry gas seals system and its regulation and control method |
| CN109893063A (en) * | 2018-11-23 | 2019-06-18 | 浙江绍兴苏泊尔生活电器有限公司 | Drum-type dish washer |
| CN110159764A (en) * | 2019-05-31 | 2019-08-23 | 清华大学 | Intelligent mechanical sealing system and its implementation |
| CN110259397A (en) * | 2019-05-30 | 2019-09-20 | 北京石油机械有限公司 | A kind of mechanical sealing washing pipe assembly |
| CN110440006A (en) * | 2019-08-29 | 2019-11-12 | 浙江工业大学 | A kind of pressure adaptive mechanically-sealing apparatus |
| CN111256920A (en) * | 2020-01-17 | 2020-06-09 | 中密控股股份有限公司 | Dry gas seal intelligent monitoring system |
| CN111998076A (en) * | 2020-08-07 | 2020-11-27 | 大连双龙泵业制造有限公司 | Novel controllable mechanical sealing structure |
| CN112303239A (en) * | 2020-10-28 | 2021-02-02 | 中国计量大学 | Novel active dynamic pressure type air film end face sealing device and intelligent control method thereof |
| CN112763120A (en) * | 2020-12-31 | 2021-05-07 | 合肥通用机械研究院有限公司 | Mechanical seal elasticity online adjustment testing arrangement |
| CN110440006B (en) * | 2019-08-29 | 2024-05-03 | 浙江工业大学 | Pressure adaptation type mechanical sealing device |
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| FR1447249A (en) * | 1965-05-21 | 1966-07-29 | Crane Packing Ltd | Axial seat rotary joint |
| JPS57184765A (en) * | 1981-05-08 | 1982-11-13 | Eagle Ind Co Ltd | Abutting condition maintaining mechanism of sliding surface of mechanical seal |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108050251A (en) * | 2017-12-06 | 2018-05-18 | 南通范氏机械有限公司 | Air sac sealing type vacuum kneader |
| CN108506493A (en) * | 2018-04-23 | 2018-09-07 | 西安交通大学 | It is a kind of can auto-control gap dry gas seals system and its regulation and control method |
| CN109893063A (en) * | 2018-11-23 | 2019-06-18 | 浙江绍兴苏泊尔生活电器有限公司 | Drum-type dish washer |
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| CN110159764A (en) * | 2019-05-31 | 2019-08-23 | 清华大学 | Intelligent mechanical sealing system and its implementation |
| CN110159764B (en) * | 2019-05-31 | 2024-01-23 | 清华大学 | Intelligent mechanical sealing system and implementation method thereof |
| CN110440006A (en) * | 2019-08-29 | 2019-11-12 | 浙江工业大学 | A kind of pressure adaptive mechanically-sealing apparatus |
| CN110440006B (en) * | 2019-08-29 | 2024-05-03 | 浙江工业大学 | Pressure adaptation type mechanical sealing device |
| CN111256920A (en) * | 2020-01-17 | 2020-06-09 | 中密控股股份有限公司 | Dry gas seal intelligent monitoring system |
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| CN111998076A (en) * | 2020-08-07 | 2020-11-27 | 大连双龙泵业制造有限公司 | Novel controllable mechanical sealing structure |
| CN112303239A (en) * | 2020-10-28 | 2021-02-02 | 中国计量大学 | Novel active dynamic pressure type air film end face sealing device and intelligent control method thereof |
| CN112763120A (en) * | 2020-12-31 | 2021-05-07 | 合肥通用机械研究院有限公司 | Mechanical seal elasticity online adjustment testing arrangement |
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Application publication date: 20171124 |