CN107631840B - A kind of labyrinth seal experimental provision with eccentric adjustment function - Google Patents
A kind of labyrinth seal experimental provision with eccentric adjustment function Download PDFInfo
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- CN107631840B CN107631840B CN201710863563.7A CN201710863563A CN107631840B CN 107631840 B CN107631840 B CN 107631840B CN 201710863563 A CN201710863563 A CN 201710863563A CN 107631840 B CN107631840 B CN 107631840B
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Abstract
The invention discloses a kind of labyrinth seal experimental provisions with eccentric adjustment function comprising: rotating assembly, for executing rotary motion；Shell cavity, at least part of the rotating assembly is located in the shell cavity, so that forming cavity between the shell cavity and the rotating assembly, the first end of the cavity is sealed by contact seal part, and second end is sealed by labyrinth seal ring；Eccentric adjustment system, is arranged in the second end of the cavity, for adjusting the eccentricity of the labyrinth seal ring；Air inlet, for the input pressure gas into the cavity；Gas outlet, for collecting the second end leaked gas of the cavity.Labyrinth gland of the invention can carry out the experiment with one heart and under eccentric two kinds of operating conditions using a kind of labyrinth seal ring of specification, so as to the influence conveniently by experimental study eccentric slot to leakage rate, provide convenience for the sealing mechanism research of labyrinth seal is unfolded.
Description
Technical field
The present invention relates to non-contact seals technical fields, and in particular to a kind of labyrinth seal with eccentric adjustment function is real
Experiment device.
Background technique
In the fields such as turbomachinery, the Fluid Sealing between rotary shaft and static element is very widely used.Currently, saturating
In flat machinery, the radial seal of rotary shaft and static element is still based on labyrinth seal.The advantages of labyrinth seal be easy processing,
The easy to assemble and harsh operating condition such as can adapt to high temperature, high speed, high pressure.Labyrinth seal in use, rotates in order to prevent
Axis is touched with labyrinth seal ring and is rubbed, and in initial assembly, needs to guarantee to have one between the sealing tooth of sealing ring and rotary shaft
Determine seal clearance, this seal clearance is usually in 0.1~0.6mm.However, since the presence of practical set error, equipment make
With possible run-off the straight (such as aero-engine, when aircraft is flipped in flight course), rotary shaft in the process
The factors such as itself expanded by heating of rotary shaft caused by high speed rotation even bending, can all lead to practical seal clearance is not always
In uniform state, and this non-uniform state may be considered a kind of eccentric slot.In current labyrinth seal tunnelling ray
In type, existing way is seal clearance to be considered as to whole circle uniformly, however this is not consistent with practical air-proof condition, causes
The computational accuracy of the leak model is not high.Therefore, studying influence of the eccentric slot of labyrinth seal to leakage rate is that extremely have must
It wants and significant.
Summary of the invention
Based on above-mentioned status, the main purpose of the present invention is to provide a kind of labyrinth seal with eccentric adjustment function is real
Experiment device, can according to need the eccentricity of adjustment labyrinth seal ring, and then can assess the eccentric slot pair of labyrinth seal ring
The influence of leakage rate.
To achieve the above object, The technical solution adopted by the invention is as follows:
A kind of labyrinth seal experimental provision with eccentric adjustment function, comprising:
Rotating assembly, for executing rotary motion；
At least part of shell cavity, the rotating assembly is located in the shell cavity, so that the shell cavity
Cavity is formed between the rotating assembly, the first end of the cavity is sealed by contact seal part, and second end is logical
Labyrinth seal ring is crossed to be sealed；
Eccentric adjustment system, is arranged in the second end of the cavity, for adjusting the eccentricity of the labyrinth seal ring；
Air inlet, for the input pressure gas into the cavity；
Gas outlet, for collecting the second end leaked gas of the cavity, to assess the inclined of the labyrinth seal ring
The relationship of heart amount and leakage rate；
It further include axial compression mechanism, for the labyrinth seal ring to be fixed along axial direction.
Preferably, the eccentric adjustment system includes:
The jackscrew screw rod being arranged in pairs, the jackscrew screw rod is arranged radially on the shell cavity, and each pair of top
Silk screw rod be located at the shell cavity it is same diametrically, with the diameter for adjusting the labyrinth seal ring along the diametrical direction
To position.
Preferably, the eccentric adjustment system further include:
Sleeve is adjusted, is installed on the inside of the shell cavity, the jackscrew screw rod is for adjustment sleeve described in pushing tow
Lateral wall, the labyrinth seal ring are installed in the adjustment sleeve.
Preferably, the adjustment sleeve is eccentric sleeve, and the radially inner side of the eccentric sleeve is provided with sealing ring ring seat,
The labyrinth seal ring is fixedly mounted relative to the sealing ring ring seat, the external cylindrical surface of the sealing ring ring seat and the bias
It being capable of relative rotation between the inner cylinder face of sleeve.
It preferably, further include rotary drive mechanism, for driving the sealing ring ring seat to revolve relative to the eccentric sleeve
Turn.
Preferably, the rotary drive mechanism includes Worm Wheel System pair, wherein worm gear is arranged in the sealing ring ring
On seat, worm screw is arranged on worm shaft, except the driving distal process of the worm shaft is for the shell cavity.
Preferably, the axial compression mechanism includes compressing end cap, the peace for compressing end cap and the labyrinth seal ring
Rolling element is provided between assembling structure, the side away from the labyrinth seal ring for compressing end cap is provided with clamping screw.
It preferably, further include clearance measurement system, for measuring the radial seal gap of the labyrinth seal ring；
And/or the rotating assembly includes rotary shaft and the sealing ring axle sleeve that is set in the rotary shaft, the labyrinth
Sealing ring is located at the radial outside of the sealing ring axle sleeve.
Preferably, the clearance measurement system includes eddy current displacement sensor, and the eddy current displacement sensor is along institute
State the radial arrangement of labyrinth seal ring, the external cylindrical surface of the gauge head of the eddy current displacement sensor towards the rotating assembly.
Preferably, when the rotating assembly includes sealing ring axle sleeve, the gauge head direction of the eddy current displacement sensor
The external cylindrical surface of the sealing ring axle sleeve.
Labyrinth seal experimental provision of the invention can adjust the position of labyrinth seal ring by eccentric adjustment system
It is whole, namely adjustment eccentricity, thus change the eccentric slot between labyrinth seal ring and rotating assembly, thus recordable leakage rate
Influence with the variation tendency of eccentric slot and the corresponding relationship of the two, thus to obtain eccentric slot to leakage rate.Of the invention
Labyrinth gland can carry out the experiment with one heart and under eccentric two kinds of operating conditions using a kind of labyrinth seal ring of specification, so as to
With the influence conveniently by experimental study eccentric slot to leakage rate, provided for the sealing mechanism research of labyrinth seal is unfolded
It is convenient.
Detailed description of the invention
Hereinafter reference will be made to the drawings to the preferred of the labyrinth seal experimental provision with eccentric adjustment function according to the present invention
Embodiment is described.In figure:
Fig. 1 is the master according to the labyrinth seal experimental provision with eccentric adjustment function of the preferred embodiment of the present invention
Cross-sectional view；
Fig. 2 is the partial enlarged view in the region I in Fig. 1；
Fig. 3 is the partial enlarged view in the region II in Fig. 1；
Fig. 4 is the A-A schematic cross-sectional view in Fig. 1；
Fig. 5 is the partial enlarged view of Fig. 4；
Fig. 6 is the B-B schematic cross-sectional view in Fig. 1, basically illustrates eccentric sleeve, sealing ring ring seat and labyrinth seal ring
Matching relationship between three.
Main appended drawing reference illustrates in figure:
1- rotary shaft；1a- cavity；2- drive end axle set；3- lip envelope；4- first bearing；5- drives end small end cover；5a- drives
The big end cap in moved end；6- shell cavity；7- air inlet；8- jackscrew screw rod；9- rubber stopper；The big end cap of 10- anti-drive end；11- big end
Lid housing screw；The first locking nut of 12-；13- eddy current displacement sensor；The second locking nut of 14-；15- clamping screw；
16- clamping screw lock nut；17- compresses end cap；18- rolling element；19- rolling element neck bush；The outer tabletting of 20- rolling element；21-
Compress end cap O-ring；The gas outlet 22-；23- sealing ring baffle ring；24- stop pin；25- sealing ring axle sleeve；26- labyrinth seal ring；
27- sealing ring ring seat；27a- worm gear；28- eccentric sleeve；28a- eccentric sleeve housing screw；29- long sleeve；The second axis of 30-
It holds；31- bearing outer ring baffle；32- bearing inner race short sleeve；33- bearing outer ring short sleeve；34- 3rd bearing；35- worm shaft
Anti-drive end small end cover housing screw；36- worm shaft anti-drive end small end cover；37- worm shaft anti-drive end small end cover O-ring；
38- worm shaft non-driven-end bearing；39- worm shaft non-driven-end bearing clamp sleeve；40- worm shaft；40a- worm screw；41- snail
Bar axis drive end bearing clamp sleeve；42- worm shaft drive end bearing；43- worm shaft drives end small end cover O-ring；44- worm screw
Axis drives end O-ring；45- worm shaft drives end small end cover；46- worm shaft drives end small end cover housing screw.
Specific embodiment
Referring to Fig. 1-6, the present invention provides a kind of labyrinth seal experimental provisions with eccentric adjustment function, can be effective
The adjustment of eccentric, concentric operating condition in labyrinth seal experiment is solved the problems, such as, so as to study the eccentric slot pair of labyrinth seal ring
The influence of leakage rate.
Specifically, as shown in Figure 1, the labyrinth seal experimental provision with eccentric adjustment function of the invention includes:
Rotating assembly, for example including rotary shaft 1, for executing rotary motion；
At least part of shell cavity 6, the rotating assembly is located in the shell cavity 6, so that outside the cavity
Cavity 1a is formed between shell 6 and the rotating assembly, the first end (left end in Fig. 1) of the cavity 1a passes through contact seal
Part (such as lip envelope 3) is sealed, and second end (right end in Fig. 1) is sealed by labyrinth seal ring 26；
The second end of the cavity 1a is arranged in eccentric adjustment system, for adjusting the bias of the labyrinth seal ring 26
Amount, such as its eccentricity is made to change or adjust to concentric operating condition；
Air inlet 7, for input pressure gas, such as high pressure gas into the cavity；Air inlet 7 is preferably provided at cavity
On shell 6, naturally it is also possible to be arranged in rotating assembly, as long as can be communicated with cavity 1a；
Gas outlet 22, the gas that the second end (namely at position of labyrinth seal ring 26) for collecting the cavity 1a leaks
Body, to assess the eccentricity of the labyrinth seal ring 26 and the relationship of leakage rate.Gas outlet 22 is preferably provided at shell cavity 6
On, naturally it is also possible to it is arranged in other structures, as long as can be communicated with the second end of cavity 1a outside.
At work, high pressure gas, the contact seal part of cavity 1a first end are inputted into cavity 1a by air inlet 7
The leakage rate at place is negligible, and gas mainly generates leakage at the labyrinth seal ring of cavity 1a second end, therefore, collects out
The gas output of port 22 can really reflect the leakage rate of labyrinth seal ring.By eccentric adjustment system to labyrinth seal ring 26
Position be adjusted (namely adjustment eccentricity), the eccentric slot between labyrinth seal ring 26 and rotating assembly can be changed,
To which recordable leakage rate is with the variation tendency of eccentric slot and the corresponding relationship of the two, thus to obtain eccentric slot to leakage rate
Influence.
Preferably, as shown in Figure 1, the bias adjustment system includes the jackscrew screw rod 8 being arranged in pairs, the jackscrew screw rod
8 are arranged radially on the shell cavity 6, and each pair of jackscrew screw rod 8 be located at the shell cavity 6 it is same diametrically,
With the radial position for adjusting the labyrinth seal ring 26 along the diametrical direction so that labyrinth seal ring 26 relative to
The eccentricity of rotary shaft 1 is adjustable.
The radial position of labyrinth seal ring 26 is adjusted for convenience of jackscrew screw rod 8, each jackscrew screw rod 8 can be with pushing tow labyrinth
The mounting structure of sealing ring 26, such as the adjustment sleeve or eccentric sleeve 28 that are subsequently noted.
In a preferred embodiment, it is provided with four pairs of jackscrew screw rods 8 altogether, that is, eight jackscrew screw rods 8 are shared, this
A little jackscrew screw rods 8 are uniformly distributed circumferentially, and can satisfy all directions adjustment demand.
Preferably, as shown in Figure 1, the bias adjustment system further includes adjustment sleeve, it is installed on the shell cavity 6
Inside, the jackscrew screw rod 8 is installed on the tune for adjusting the lateral wall of sleeve, the labyrinth seal ring 26 described in pushing tow
In a whole set of cylinder.
Preferably, the adjustment sleeve is eccentric sleeve 28, and the radially inner side of the eccentric sleeve 28 is provided with sealing ring
Ring seat 27, the labyrinth seal ring 26 are fixedly mounted relative to the sealing ring ring seat 27, the outer circle of the sealing ring ring seat 27
It being capable of relative rotation between cylinder and the inner cylinder face of the eccentric sleeve 28.When sealing ring ring seat 27 is relative to eccentric sleeve 28
When rotation, due to the two decentraction, it will lead to labyrinth seal ring 26 and deviate its original position, thus relative to 1 shape of rotary shaft
At bias.
Preferably, labyrinth seal experimental provision of the invention further includes rotary drive mechanism, for driving the sealing ring
Ring seat 27 is rotated relative to the eccentric sleeve 28, therefore, in specific works, can by rotary drive mechanism easily into
The adjustment of row eccentricity.
Preferably, as illustrated in figures 4-5, the rotary drive mechanism includes Worm Wheel System pair, wherein worm gear 27a is set
Set in the sealing ring ring seat 27 (for example, can be integrally disposed upon in sealing ring ring seat 27, can also be fixed by installation
Mode is arranged in sealing ring ring seat 27), worm screw 40a is arranged on worm shaft 40, the driving distal process of the worm shaft 40 for
Except the shell cavity 6, in order to apply driving force.
Preferably, labyrinth seal experimental provision of the invention further includes axial compression mechanism, is used for the labyrinth seal
Ring 26 is fixed along axial direction.
Preferably, as shown in Figure 1-3, the axial compression mechanism includes compressing end cap 17, the compression end cap 17 and institute
It states and is provided with rolling element 18 between the mounting structure (such as sealing ring ring seat 27 or other mounting structures) of labyrinth seal ring 26
(such as ball), the side away from the labyrinth seal ring 26 for compressing end cap 17 are provided with clamping screw 15.Compress spiral shell
Bar 15 is for example arranged in threadably on the big end cap 10 of anti-drive end, and can by clamping screw lock nut 16 into
Row locking, wherein the big end cap 10 of anti-drive end, which is arranged in, compresses the axially external of end cap 17.
By compressing end cap 17 described in 15 pushing tow of clamping screw, the compression end cap 17 is pushed up through the rolling element 18 again
The sealing ring ring seat 27 is pushed away, labyrinth seal ring 26 can be limited along axial compression, prevent it from play or deflection occurs.It rolls
The presence of body 18 can be avoided when sealing ring ring seat 27 rotates and compress and rubs between end cap 17.
Preferably, labyrinth seal experimental provision of the invention further includes clearance measurement system, close for measuring the labyrinth
The radial seal gap of seal ring 26, to accurately determine the size of its eccentric slot.
Preferably, as shown in Figs. 1-2, the clearance measurement system includes eddy current displacement sensor 13, the current vortex
Displacement sensor 13 is arranged along the radial direction of the labyrinth seal ring 26, and is fixed relative to the labyrinth seal ring 26, described
External cylindrical surface of the gauge head of eddy current displacement sensor 13 towards the rotating assembly.In specific works, current vortex displacement is passed
Sensor 13 and labyrinth seal ring 26 can be considered an entirety, the two relative to the movement of rotating assembly be always it is synchronous, therefore,
When the eccentric slot that labyrinth seal ring 26 corresponds at the position of eddy current displacement sensor 13 increases or reduces, current vortex displacement
The distance between sensor 13 and rotating assembly also synchronize increase or reduce, the amount increased or reduced is labyrinth seal ring 26
The knots modification of eccentricity can be specifically easily determined out by eddy current displacement sensor 13.
Preferably, as shown in Figs. 1-2, the rotating assembly includes rotary shaft 1 and sealing ring axle sleeve 25, sealing ring axle sleeve 25
Such as be set in the rotary shaft 1 from one end of rotary shaft 1 and be fixed by means of screw, so that the sealing ring axle sleeve 25
Always an entirety is formed with rotary shaft 1.The labyrinth seal ring 26 is located at the radial outside of the sealing ring axle sleeve 25, and
External cylindrical surface of the gauge head of the eddy current displacement sensor 13 towards the sealing ring axle sleeve 25.By the way that sealing ring axle sleeve is arranged
25, cause labyrinth seal ring 26 to injure due to touching and rub with rotary shaft 1 because adjustment amount is excessive during adjustment can be prevented eccentric
Rotary shaft 1 also can protect rotary shaft 1 by way of sacrificing sealing ring axle sleeve 25, the sealing ring after damaging due to rubbing because touching
Axle sleeve 25 can be replaced, without replacing to rotary shaft 1.
Illustrate the exemplary preferred structure of labyrinth seal experimental provision of the invention in conjunction with attached drawing 1-6 below.
As shown in Figure 1, the external support structure of the labyrinth seal experimental provision includes: the big end cap 10 of anti-drive end, cavity
Shell 6, the big end cap 5a in driving end and driving end small end cover 5, wherein the big end cap 5a difference of the big end cap 10 of anti-drive end and driving end
The axial ends of shell cavity 6 is set, and is fixed by means of big end cap housing screw 11, big 10 He of end cap of anti-drive end
The driving big end cap 5a in end passes through the both ends that round boss is positioned at shell cavity 6.
Wherein, driving end refers to one end corresponding with the rotary driving force input terminal of rotating assembly.
As shown in Figure 1, the rotating assembly of the labyrinth seal experimental provision includes: rotary shaft 1, drive end axle set 2, first axle
Hold 4 (preferably deep groove ball bearings), long sleeve 29, bearing inner race short sleeve 32, the second bearing 30 being arranged in pairs and third axis
Hold 34 (preferably angular contact ball bearings) and sealing ring axle sleeve 25.Wherein, drive end axle set 2 is mounted on rotation by screw
In the first end (i.e. driving end is left end in Fig. 1) of axis 1, the setting of first bearing 4 rotary shaft 1 and the driving big end cap 5a in end it
Between, with the first end for supporting rotating shaft 1, the inner ring of first bearing 4 is fixed by drive end axle set 2, outside first bearing 4
Circle is then fixed by the driving end small end cover 5.Second bearing 30 and 3rd bearing 34 are arranged between rotary shaft 1 and shell cavity 6,
Middle part for supporting rotating shaft 1.The fixed first bearing 4 of long sleeve 29 and bearing inner race short sleeve 32, second bearing 30 and the
The inner ring of three bearings 34.The bearing that first bearing 4, second bearing 30 and 3rd bearing 34 complete jointly to rotary shaft 1 positions.Its
In, second bearing 30 and 3rd bearing 34 are a pair of anti-angular contact ball bearing filled, and the outer ring of second bearing 30 passes through outside bearing
Circle baffle 31 is fixed, and bearing outer ring short sleeve 33 is additionally provided between second bearing 30 and 3rd bearing 34, for keeping
Relative position between the outer ring of two bearings.Sealing ring axle sleeve 25 is fixed on the second end of rotary shaft 1 by uniformly distributed screw
On (i.e. anti-drive end is right end in figure).
As shown in Figure 1, being provided with contact seal part between driving end small end cover 5 and drive end axle set 2, preferably lip is sealed
3, to be sealed for the first end to cavity 1a.
Air inlet 7 is arranged on shell cavity 6, is presented axially in the position between second bearing 34 and labyrinth seal ring 26
Set place.
As shown in Fig. 2, eddy current displacement sensor 13 passes through the radial through-hole in sealing ring ring seat 27, and pass through the first lock
Tight nut 12 and the second locking nut 14 are fixed in sealing ring ring seat 27, and the conducting wire of eddy current displacement sensor 13 passes through cavity
Through-hole export on shell 6, and the through-hole on shell cavity 6 is sealed by rubber stopper 9, gas overflowing is prevented, while protection is led
Line.
As shown in Fig. 2, labyrinth seal ring 26 is mounted on the radially inner side of sealing ring ring seat 27, and pass through sealing ring baffle ring 23
It is pressed in sealing ring ring seat 27, is connected between sealing ring baffle ring 23 and sealing ring ring seat 27 by 8 uniformly distributed housing screws,
High pressure O-ring is equipped between sealing ring ring seat 27 and sealing ring 26, to prevent gas from leaking.To prevent labyrinth seal ring 26 opposite
It is rotated in sealing ring ring seat 27, stop pin 24, stop pin is provided between labyrinth seal ring 26 and sealing ring baffle ring 23
24 pass axially through sealing ring baffle ring 23 and are inserted into labyrinth seal ring 26, are in 180 ° points there are two stop pin 24 is preferably provided with
Cloth.It is provided integrally with worm-gear toothing in sealing ring ring seat 27, to constitute turbine 27a.
It is gap-matched between eccentric sleeve 28 and shell cavity 6, has height between eccentric sleeve 28 and shell cavity 6
O-ring is pressed, eccentric sleeve 28 is connected on shell cavity 6 by 16 uniformly distributed housing screw 28a.
8 jackscrew screw rods 8 are uniformly distributed circumferentially on shell cavity 6, and the inner end of jackscrew screw rod 8 is eccentric for pushing tow
The external cylindrical surface of sleeve 28.
As shown in Fig. 2, the inside that end cap 17 is mounted on shell cavity 6 is compressed, between the inner cylinder face of shell cavity 6
It is gap-matched, and has compress end cap O-ring to prevent gas from leaking between the two.Multiple (preferably 20) rolling elements
18 pass through rolling element external pressure by the limit between the progress of rolling element neck bush 19, rolling element 18 and rolling element neck bush 19
Piece 20, which is pressed on, to be compressed on end cap 17, to be threadedly coupled between the outer tabletting 20 of rolling element and compression end cap 17, multiple rolling elements 18
It is uniformly distributed circumferentially, and is all pressed in sealing ring ring seat 27.
Since the gap between each rolling element 18 is larger, the gas of the clearance leakage through labyrinth seal ring 26 can be through rolling
The gap of kinetoplast 18 flows to the radial outside space of sealing ring ring seat 27.Gas outlet 22 is arranged on shell cavity 6, in axial direction
At the upper position between eccentric sleeve 28 and compression end cap 17.Periphery to prevent gas from being compressed end cap 17 leaks and shadow
Experimental precision is rung, compresses and is provided with compression end cap O-ring between end cap 17 and shell cavity 6.The outer end of gas outlet 22 can connect
Flowmeter, to be convenient to the leakage rate of measurement labyrinth seal ring 26.
As illustrated in figures 4-5, the specific composition of rotary drive mechanism are as follows: worm screw 40a and sealing ring ring seat on worm shaft 40
Turbine 27a on 27 is meshed, and so as to rotate by the rotation of worm shaft 40 band rotary packing ring ring seat 27, and then drives labyrinth
Sealing ring 26 rotates.Wherein, the two supports of worm shaft 40 are on shell cavity 6.Specifically, worm shaft anti-drive end small end cover
36 are mounted on shell cavity 6 by 6 uniformly distributed housing screws 35, in worm shaft anti-drive end small end cover 36 and shell cavity
It is provided with worm shaft anti-drive end small end cover O-ring 37 between 6, prevents gas overflowing.The anti-drive end of worm shaft 40 passes through snail
Bar axis non-driven-end bearing 38 is supported, and the outer ring of worm shaft non-driven-end bearing 38 passes through worm shaft anti-drive end small end cover
36 are fixed, and inner ring then passes through worm shaft non-driven-end bearing clamp sleeve 39 and is fixed.The driving end of worm shaft 40 is logical
It crosses worm shaft drive end bearing 42 to be supported, the outer ring of worm shaft drive end bearing 42 drives end small end cover 45 by worm shaft
It is fixed, inner ring then passes through worm shaft drive end bearing clamp sleeve 41 and is fixed.Worm shaft drives end small end cover 45 logical
6 uniformly distributed housing screws 45 are crossed to be mounted on shell cavity 6.The driving end of worm shaft 40 passes through worm shaft and drives end small end cover
45 and protrude from except shell cavity 6, to connect power mechanism, such as motor or can be manually rotated mechanism.It is driven in worm shaft
It is provided with worm shaft driving end small end cover O-ring 43 between end small end cover 45 and shell cavity 6, drives end small end cover in worm shaft
Worm shaft driving end O-ring 44 is provided between 45 and worm shaft 40, to prevent gas overflowing.
As shown in Figure 1, clamping screw 15 is threadedly attached on the big end cap 10 of anti-drive end, clamping screw lock nut
16 are arranged in the outside of the big end cap 10 of anti-drive end, and for locking clamping screw 15, clamping screw 15 is for holding out against pressure
Tight end cap 17 prevents sealing ring ring seat 27 de- so that sealing ring ring seat 27 is pressed on the axial step face of shell cavity 6
It falls, while namely preventing labyrinth seal ring 26 from falling off along axial direction.
The distance of the gauge head end face of eddy current displacement sensor 13 to sealing ring axle sleeve 25 is 5mm, current vortex displacement sensing
The trailing wire of device 13 seals the through-hole on shell cavity 6 by rubber stopper 9 by the through-hole export on shell cavity 6, prevents
Only gas overflowing.Half rotation is only at most needed since sealing ring ring seat 27 rotates adjustment bias, so during the installation process may be used
Conducting wire is twined into half-turn counterclockwise more, prevents eddy current displacement sensor 13 from pulling apart conducting wire when rotating.Eddy current displacement sensor
13 measurements are radial distances between the gauge head end face of eddy current displacement sensor 13 and sealing ring axle sleeve 25, are installing electric whirlpool
It is measured between 26 tooth top of gauge head end face and labyrinth seal ring of eddy current displacement sensor 13 in advance when flowing displacement sensor 13
Radial distance, in actual work, the gap width between labyrinth seal ring 26 and sealing axle sleeve 25 is above-mentioned two measurements distance
The difference of value.Guarantee that sealing ring ring seat 27 and labyrinth seal ring 26 have high-precision coaxial degree in process, so this is measured
Value also can accurately react the clearance distance between labyrinth seal ring 27 and sealing ring axle sleeve 25, and this measurement gap means can
With the real-time measurement seal clearance in the case where not dismantling experimental provision.Due to eddy current displacement sensor 13 and sealing ring axle sleeve
It is not contacted between 25, therefore may be implemented to measure dynamic labyrinth seal clearance when rotary shaft 1 rotates.
There is high pressure O-ring between sealing ring ring seat 27 and sealing ring 26, prevents gas from leaking from this.Sealing ring ring seat 27
It is mounted on eccentric sleeve 28, sealing ring ring seat 27 is pressed on eccentric sleeve 28 by compressing the rolling element on end cap 17,
Wherein between sealing ring ring seat 27 and eccentric sleeve 28 for small―gap suture cooperate, and for off-centre operation cooperate, sealing ring ring seat 27 with
The step surface matched between labyrinth seal ring 26 is concentric transition fit.Labyrinth seal ring 26 is compressed by sealing ring baffle ring 23
In sealing ring ring seat 27, and with the seal clearance of 0.5mm, sealing ring between labyrinth seal ring 26 and sealing ring axle sleeve 25
Positioning was prevented between baffle ring 23 and labyrinth seal ring 26 for wide arc gap cooperation.
Cooperated between eccentric sleeve 28 and shell cavity 6 using concentric wide arc gap, the screwing through hole on eccentric sleeve 28 is straight
Diameter is 9mm, and 8 plane domains are uniformly milled out on the external cylindrical surface of eccentric sleeve 28, and 8 jackscrew screw rods 8 can act on respectively
On 8 plane domains of eccentric sleeve 28, eccentric sleeve 28 can be adjusted to different by adjusting 8 jackscrew screw rods 8
Radial position.There is O-ring between eccentric sleeve 28 and shell cavity 6, one of effect determines eccentric sleeve 28 for auxiliary
The heart, to prevent from overflowing gas from this, eccentric sleeve 28 is connected the two of effect by 16 uniformly distributed eccentric sleeve housing screw 28a
It connects and is fixed on shell cavity 6.
It is as follows that jackscrew screw rod 8 is adjusted eccentric mode to eccentric sleeve 28: it is inclined to carry out coarse adjustment sealing in assembling stage
Heart amount, using vertical installation, when sealing ring ring seat 27, labyrinth seal ring 26 and sealing ring baffle ring 23 do not use worm and gear to rotate
When, sealing ring ring seat 27, labyrinth seal ring 26, sealing ring baffle ring 23 and eccentric sleeve 28 can be considered as static element, it will be eccentric
Sleeve housing screw 28a unclamps, so that it may be elapsed by 8 circumferentially uniformly distributed jackscrew screw rods 8 to above-mentioned static element, to change
Becoming seal clearance size, seal clearance is measured by eddy current displacement sensor 13, when reaching specified seal eccentric amount, then
Eccentric sleeve housing screw 28a is tightened, eccentric sleeve 28 is compressed.It is same due to being used between eccentric sleeve 28 and shell cavity 6
Heart wide arc gap cooperates, and the screwing through hole diameter on eccentric sleeve 28 is 9mm, and eccentric sleeve housing screw is M8 screw, so partially
Heart sleeve 28 may be implemented to move radially and not interfere screw.
It compresses and is gap-matched between end cap 17 and 6 inner circle cylindrical surface of shell cavity, compress the setting of end cap O-ring 21 and exist
It compresses between end cap 17 and shell cavity 6.
Labyrinth seal experimental provision of the invention can be realized the experiment of Mechanism of Labyrinth Seal Journal of Sex Research, can be offline, online
Labyrinth seal eccentricity is adjusted, on-line measurement seal clearance may be implemented.
The method of offline coarse adjustment labyrinth seal eccentricity is as follows: coarse adjustment seal eccentric amount is carried out in assembling stage, using vertical
Formula installation, this process is not inflated into cavity 1a, when sealing ring ring seat 27, labyrinth seal ring 26 and sealing ring baffle ring 23 are not adopted
When being rotated with worm and gear, sealing ring ring seat 27, labyrinth seal ring 26, sealing ring baffle ring 23 and eccentric sleeve 28 can be considered as
Eccentric sleeve housing screw 28a is followed closely and is unclamped, so that it may by 8 circumferentially uniformly distributed jackscrew screw rods 8 to above-mentioned static element by static element
It is elapsed, to change seal eccentric amount size, seal clearance is measured by eddy current displacement sensor 13, specified when reaching
Seal eccentric amount when, then tighten eccentric sleeve housing screw 28a, eccentric sleeve 28 compressed.In this process, because compressing
End cap 17 is there is no installing, and sealing ring ring seat 27 is not compacted, and sealing ring ring seat 27 is can to revolve relative to eccentric sleeve 28
Turn, eccentricity adjusted be it is inaccurate, this process only by the eccentricity of actual use be locked in a range with
Interior, more accurate eccentricity adjustment is then adjusted by online mode.
On-line tuning labyrinth seal eccentricity method can refer to Fig. 1, Fig. 3 and Fig. 6: what the 1B in Fig. 1, Fig. 3 and Fig. 6 was indicated
It is the mating surface of 28 outer circle of eccentric sleeve Yu 6 inner circle of shell cavity, which is cooperated using wide arc gap；In Fig. 1, Fig. 3 and Fig. 6
2B indicate be 28 inner circle of eccentric sleeve Yu 27 outer circle of sealing ring ring seat mating surface, the mating surface use small―gap suture bias match
It closes；What the 3B in Fig. 1, Fig. 3 and Fig. 6 was indicated is the mating surface of 27 inner circle of sealing ring ring seat Yu 26 outer circle of labyrinth seal ring, this is matched
Conjunction face uses concentric transition fit.Due to being provided with worm gear 27a, sealing ring ring seat 27, labyrinth seal ring in sealing ring ring seat 27
26 and sealing ring baffle ring 23 be connected by screw to and can be considered whole together, pass through worm shaft 40 and rotary driving force, sealing be provided
Ring ring seat 27, labyrinth seal ring 26 and 23 entirety of sealing ring baffle ring will be circumferentially rotatable.Due to 28 inner circle of eccentric sleeve with it is close
27 outer circle of seal ring ring seat is cooperated using small―gap suture bias, so different rotation angle, sealing ring ring seat 27, labyrinth seal ring 26 and
Sealing ring baffle ring 23 is whole to generate different eccentricity, to realize the eccentric purpose of adjustment.In the process, end cap is compressed
17 are pressed on the end face of sealing ring ring seat 27 by circumferential equally distributed rolling element 18, when worm shaft 40 makes sealing ring ring seat 27
When rotation, it can suitably reduce pressing force by unscrewing clamping screw 15, be adjusted in order to which sealing ring ring seat 27 rotates, when adjustment is inclined
After the heart, then tightens clamping screw 15 and locked with clamping screw lock nut 16.Entire adjustment process is off logical
Gas, after adjusting eccentricity, then carry out ventilation experiment.
It, can be using a kind of specification since labyrinth seal experimental provision of the invention has the function of adjusting eccentric slot
Labyrinth seal ring carries out the experiment under concentric and eccentric two kinds of operating conditions, so as to conveniently by experimental study eccentric slot pair
The influence of leakage rate is provided convenience for the sealing mechanism research of labyrinth seal is unfolded.Labyrinth seal experimental provision of the invention
Can offline, on-line tuning eccentric slot, radial disbalance amount maximum is up to 1mm, and wherein on-line tuning seal eccentric amount can be
It is carried out when experimental run, is achieved with seal eccentric amount to the affecting laws of leakage rate without dismounting experimental provision.Experiment dress
Set may be implemented maximum (top) speed be 15000rpm or realize maximum linear velocity be 100m/s, the harshness that maximum inlet pressure is 3MPa
Seal operating condition.In terms of measurement and data acquisition, using eddy current displacement sensor real-time measurement seal clearance, measurement means are
Non-cpntact measurement, and data are acquired by capture card, real-time monitoring is carried out at remote computer end.
Those skilled in the art will readily recognize that above-mentioned each preferred embodiment can be free under the premise of not conflicting
Ground combination, superposition.
It should be appreciated that above-mentioned embodiment is merely exemplary, and not restrictive, without departing from of the invention basic
In the case where principle, those skilled in the art can be directed to the various apparent or equivalent modification or replace that above-mentioned details is made
It changes, is all included in scope of the presently claimed invention.
Claims (10)
1. a kind of labyrinth seal experimental provision with eccentric adjustment function characterized by comprising
Rotating assembly, for executing rotary motion；
At least part of shell cavity, the rotating assembly is located in the shell cavity, so that the shell cavity and institute
It states and forms cavity between rotating assembly, the first end of the cavity is sealed by contact seal part, and second end passes through fan
Palace sealing ring is sealed；
Eccentric adjustment system, is arranged in the second end of the cavity, for adjusting the eccentricity of the labyrinth seal ring；
Air inlet, for the input pressure gas into the cavity；
Gas outlet, for collecting the second end leaked gas of the cavity, to assess the eccentricity of the labyrinth seal ring
With the relationship of leakage rate；
It further include axial compression mechanism, for the labyrinth seal ring to be fixed along axial direction.
2. labyrinth seal experimental provision according to claim 1, which is characterized in that it is described bias adjustment system include:
The jackscrew screw rod being arranged in pairs, the jackscrew screw rod are arranged radially on the shell cavity, and each pair of jackscrew spiral shell
Bar be located at the shell cavity it is same diametrically, with the radial position for adjusting the labyrinth seal ring along the diametrical direction
It sets.
3. labyrinth seal experimental provision according to claim 2, which is characterized in that the bias adjustment system further include:
Sleeve is adjusted, is installed on the inside of the shell cavity, the jackscrew screw rod is for adjusting the outside of sleeve described in pushing tow
Wall, the labyrinth seal ring are installed in the adjustment sleeve.
4. labyrinth seal experimental provision according to claim 3, which is characterized in that the adjustment sleeve is eccentric sleeve,
The radially inner side of the eccentric sleeve is provided with sealing ring ring seat, and the labyrinth seal ring is fixed relative to the sealing ring ring seat
Installation, being capable of relative rotation between the external cylindrical surface of the sealing ring ring seat and the inner cylinder face of the eccentric sleeve.
5. labyrinth seal experimental provision according to claim 4, which is characterized in that further include rotary drive mechanism, be used for
The sealing ring ring seat is driven to rotate relative to the eccentric sleeve.
6. labyrinth seal experimental provision according to claim 5, which is characterized in that the rotary drive mechanism includes worm gear
Worm transmission pair, wherein worm gear is arranged in the sealing ring ring seat, and worm screw is arranged on worm shaft, the drive of the worm shaft
Moved end protrudes from except the shell cavity.
7. labyrinth seal experimental provision according to claim 1, which is characterized in that the axial compression mechanism includes compressing
End cap is provided with rolling element, the back for compressing end cap between compression end cap and the mounting structure of the labyrinth seal ring
Side from the labyrinth seal ring is provided with clamping screw.
8. labyrinth seal experimental provision described in one of -7 according to claim 1, which is characterized in that further include clearance measurement system
System, for measuring the radial seal gap of the labyrinth seal ring；
And/or the rotating assembly includes rotary shaft and the sealing ring axle sleeve that is set in the rotary shaft, the labyrinth seal
Ring is located at the radial outside of the sealing ring axle sleeve.
9. labyrinth seal experimental provision according to claim 8, which is characterized in that the clearance measurement system includes electric whirlpool
Flow displacement sensor, radial direction arrangement of the eddy current displacement sensor along the labyrinth seal ring, the current vortex displacement biography
External cylindrical surface of the gauge head of sensor towards the rotating assembly.
10. labyrinth seal experimental provision according to claim 9, which is characterized in that when the rotating assembly includes sealing
When annulate shaft covers, the external cylindrical surface of the gauge head of the eddy current displacement sensor towards the sealing ring axle sleeve.
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| CN201710863563.7A CN107631840B (en) | 2017-09-22 | 2017-09-22 | A kind of labyrinth seal experimental provision with eccentric adjustment function |
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| CN201710863563.7A CN107631840B (en) | 2017-09-22 | 2017-09-22 | A kind of labyrinth seal experimental provision with eccentric adjustment function |
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| CN109141773B (en) * | 2018-07-25 | 2020-02-11 | 沈阳航空航天大学 | Experimental device for measure dynamic seal self-adaptation concentricity performance |
| CN109029211B (en) * | 2018-07-26 | 2020-06-12 | 柳州上汽汽车变速器有限公司 | Measuring instrument and measuring method for axial clearance of rotating shaft of transmission |
| CN111964849B (en) * | 2020-08-06 | 2022-05-27 | 绍兴淼汇能源科技有限公司 | Labyrinth seal experimental device |
| CN113252297B (en) * | 2021-05-07 | 2022-07-08 | 沈阳工业大学 | Axial adjustable testing device for labyrinth seal experiment |
| CN113155374B (en) * | 2021-05-20 | 2024-05-10 | 中铁工程装备集团有限公司 | Main driving sealing experiment table of heading machine and application method thereof |
| CN114046987B (en) * | 2022-01-13 | 2022-03-25 | 清华大学 | Multi-physical quantity measurement test device for rotating shaft sealing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103091056A (en) * | 2013-01-14 | 2013-05-08 | 清华大学 | Multifunctional brush type sealing experiment system |
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| FR2731514B1 (en) * | 1995-03-07 | 1997-05-30 | Europ Propulsion | ANNULAR MEASURING DEVICE FOR THE CHARACTERIZATION OF FLANGE CONNECTIONS |
| CN2337496Y (en) * | 1998-10-22 | 1999-09-08 | 中国长城铝业公司中州铝厂 | Sealing device for rotary kiln |
| CN202372319U (en) * | 2011-10-11 | 2012-08-08 | 浙江工业大学 | Gas sealing experimental device |
| CN205175673U (en) * | 2015-12-01 | 2016-04-20 | 中国航空动力机械研究所 | Lip oil blanket test device |
| CN106525359B (en) * | 2016-10-27 | 2018-12-25 | 中国地质大学（北京） | A kind of plasma discharge cavity body labyrinth seal experimental system |
| CN107132008A (en) * | 2017-06-09 | 2017-09-05 | 济南中铁重工轨道装备有限公司 | A kind of main driving seal test device of earth pressure balance shield machine and method |
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| CN103091056A (en) * | 2013-01-14 | 2013-05-08 | 清华大学 | Multifunctional brush type sealing experiment system |
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