CN107631840A - 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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- CN107631840A CN107631840A CN201710863563.7A CN201710863563A CN107631840A CN 107631840 A CN107631840 A CN 107631840A CN 201710863563 A CN201710863563 A CN 201710863563A CN 107631840 A CN107631840 A CN 107631840A
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- labyrinth seal
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- sealing ring
- eccentric
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Abstract
The invention discloses a kind of labyrinth seal experimental provision with eccentric adjustment function, it includes：Rotating assembly, for performing rotary motion；Shell cavity, at least a portion 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 the second end is sealed by labyrinth seal ring；Eccentric adjustment system, the second end of the cavity is arranged on, for adjusting the offset of the labyrinth seal ring；Air inlet, for the input pressure gas into the cavity；Gas outlet, the gas that the second end for collecting the cavity leaks.The labyrinth gland of the present invention can use a kind of labyrinth seal ring of specification to carry out the experiment under concentric and eccentric two kinds of operating modes, so as to conveniently by influence of the experimental study eccentric slot to leakage rate, be provided convenience to deploy the research of the sealing mechanism of labyrinth seal.
Description
Technical field
The present invention relates to non-contact seals technical field, and in particular to a kind of labyrinth seal reality with eccentric adjustment function
Experiment device.
Background technology
In the fields such as turbomachinery, the Fluid Sealing application between rotary shaft and static element is very extensive.At present, 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,
It is easy to assemble and can adapt to the harsh operating mode such as high temperature, high speed, high pressure.Labyrinth seal in use, in order to prevent rotating
Axle is touched with labyrinth seal ring and rubbed, in initial assembling, it is necessary to ensure there is one between the sealing tooth of sealing ring and rotary shaft
Determine seal clearance, this seal clearance is generally in 0.1~0.6mm.However, because the presence of practical set error, equipment make
May run-off the straight (such as aero-engine, when aircraft is overturn in flight course), rotary shaft during
The even factor such as bending of rotary shaft itself expanded by heating caused by rotating at a high speed, it is not always that can all cause actual seal clearance
In uniform state, and this uneven state may be considered a kind of eccentric slot.In current labyrinth seal tunnelling ray
In type, existing way is that seal clearance is considered as into whole circle uniformly, but this is not consistent with actual air-proof condition, causes
The computational accuracy of the leak model is not high.Therefore, it is that extremely have must to study influence of the eccentric slot of labyrinth seal to leakage rate
Want and significant.
The content of the invention
It is real it is a primary object of the present invention to provide a kind of labyrinth seal with eccentric adjustment function based on above-mentioned present situation
Experiment device, it can adjust the offset of labyrinth seal ring as needed, 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 present invention is as follows：
A kind of labyrinth seal experimental provision with eccentric adjustment function, including：
Rotating assembly, for performing rotary motion；
Shell cavity, at least a portion of the rotating assembly are 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 the second end leads to
Labyrinth seal ring is crossed to be sealed；
Eccentric adjustment system, the second end of the cavity is arranged on, for adjusting the offset of the labyrinth seal ring；
Air inlet, for the input pressure gas into the cavity；
Gas outlet, the gas that the second end for collecting the cavity leaks, to assess the inclined of the labyrinth seal ring
The relation of heart amount and leakage rate.
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 top
Silk screw rod be located at the shell cavity it is same diametrically, for along the footpath of the diametric(al) adjustment labyrinth seal ring
To position.
Preferably, the eccentric adjustment system also includes：
Sleeve is adjusted, is installed on the inside of the shell cavity, the jackscrew screw rod is used to adjust sleeve described in pushing tow
Lateral wall, the labyrinth seal ring are installed in the adjustment sleeve.
Preferably, the adjustment sleeve is eccentric adjusting sleeve, and the radially inner side of the eccentric adjusting sleeve is provided with sealing ring ring seat,
The labyrinth seal ring is fixedly mounted relative to the sealing ring ring seat, external cylindrical surface and the bias of the sealing ring ring seat
It can be rotated against between the inner cylinder face of sleeve.
Preferably, in addition to rotary drive mechanism, for driving the sealing ring ring seat to be revolved relative to the eccentric adjusting sleeve
Turn.
Preferably, the rotary drive mechanism includes Worm Wheel System pair, wherein, worm gear is arranged on the sealing ring ring
On seat, worm screw is arranged on worm shaft, and the drive end of the worm shaft is protruded from outside the shell cavity.
Preferably, in addition to axial compression mechanism, for the labyrinth seal ring to be fixed vertically.
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 compression end cap is provided with clamping screw away from the side of the labyrinth seal ring.
Preferably, in addition to 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 being 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.
The labyrinth seal experimental provision of the present invention can be adjusted by eccentric adjustment system to the position of labyrinth seal ring
It is whole, namely adjustment offset, thus change the eccentric slot between labyrinth seal ring and rotating assembly, so as to recordable leakage rate
With the variation tendency and the corresponding relation of the two of eccentric slot, influence of the eccentric slot to leakage rate is derived from.The present invention's
Labyrinth gland can use a kind of labyrinth seal ring of specification to carry out the experiment under concentric and eccentric two kinds of operating modes, so as to
Conveniently by influence of the experimental study eccentric slot to leakage rate, to be provided to deploy the research of the sealing mechanism of labyrinth seal
It is convenient.
Brief description of the drawings
Hereinafter with reference to accompanying drawing 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
Sectional view；
Fig. 2 is the partial enlarged view in I regions in Fig. 1；
Fig. 3 is the partial enlarged view in II regions in Fig. 1；
Fig. 4 is the A-A schematic cross-sectional views in Fig. 1；
Fig. 5 is Fig. 4 partial enlarged view；
Fig. 6 is the B-B schematic cross-sectional views in Fig. 1, basically illustrates eccentric adjusting sleeve, sealing ring ring seat and labyrinth seal ring
Matching relationship between three.
Main Reference Numerals explanation in figure：
1- rotary shafts；1a- cavitys；2- drive end axle sleeves；3- lips seal；4- clutch shaft bearings；5- drive end small end covers；5a- drives
The big end cap in moved end；6- shell cavities；7- air inlets；8- jackscrew screw rods；9- rubber stoppers；The big end cap of 10- anti-drive ends；The big ends of 11-
Lid housing screw；The locking nuts of 12- first；13- eddy current displacement sensors；The locking nuts of 14- second；15- clamping screws；
16- clamping screw lock nuts；17- compresses end cap；18- rolling elements；19- rolling element neck bush；The outer tabletting of 20- rolling elements；21-
Compress end cap O-ring；22- gas outlets；23- sealing ring baffle rings；24- stop pins；25- sealing ring axle sleeves；26- labyrinth seal rings；
27- sealing ring ring seats；27a- worm gears；28- eccentric adjusting sleeves；28a- eccentric adjusting sleeve housing screws；29- long sleeves；The axles of 30- second
Hold；31- bearing outer ring baffle plates；32- bearing inner race short sleeves；33- bearing outer ring short sleeves；34- 3rd bearings；35- worm shafts
Anti-drive end small end cover housing screw；36- worm shaft anti-drive end small end covers；37- worm shaft anti-drive end small end cover O-rings；
38- worm shaft non-driven-end bearings；39- worm shaft non-driven-end bearing clamp sleeves；40- worm shafts；40a- worm screws；41- snails
Bar axle drive end bearing clamp sleeve；42- worm shaft drive end bearings；43- worm shaft drive end small end cover O-rings；44- worm screws
Axle drive end O-ring；45- worm shaft drive end small end covers；46- worm shaft drive end small end cover housing screws.
Embodiment
, can be effective the invention provides a kind of labyrinth seal experimental provision with eccentric adjustment function referring to Fig. 1-6
Solves the problems, such as the adjustment of eccentric, concentric operating mode in labyrinth seal experiment, 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 present invention includes：
Rotating assembly, such as including rotary shaft 1, for performing rotary motion；
Shell cavity 6, at least a portion of the rotating assembly are located in the shell cavity 6 so that outside the cavity
The first end (left end in Fig. 1) that cavity 1a, the cavity 1a are formed between shell 6 and the rotating assembly passes through contact seal
Part (such as lip envelope 3) is sealed, and the second end (right-hand member in Fig. 1) is sealed by labyrinth seal ring 26；
Eccentric adjustment system, the second end of the cavity 1a is arranged on, for adjusting the bias of the labyrinth seal ring 26
Amount, such as its offset is changed or is adjusted to concentric operating mode；
Air inlet 7, for input pressure gas, such as gases at high pressure 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 opening position of labyrinth seal ring 26) for collecting the cavity 1a leaks
Body, to assess the relation of the offset of the labyrinth seal ring 26 and 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 with being communicated on the outside of cavity 1a the second end.
At work, gases at high pressure, the contact seal part of cavity 1a first ends are inputted into cavity 1a by air inlet 7
The leakage rate at place can be neglected, and gas mainly produces leakage at the labyrinth seal ring at the ends of cavity 1a second, therefore, collects out
The gas output of gas port 22, you can the leakage rate of true reflection labyrinth seal ring.By eccentric adjustment system to labyrinth seal ring 26
Position be adjusted (namely adjustment offset), the eccentric slot between labyrinth seal ring 26 and rotating assembly can be changed,
So as to which recordable leakage rate is with the variation tendency and the corresponding relation of the two of eccentric slot, eccentric slot is derived to leakage rate
Influence.
Preferably, as shown in figure 1, the eccentric 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 jackscrew screw rod 8 be located at the shell cavity 6 it is same diametrically,
For adjusting the radial position of the labyrinth seal ring 26 along the diametric(al) so that labyrinth seal ring 26 relative to
The offset of rotary shaft 1 is adjustable.
For convenience of radial position adjustment of the jackscrew screw rod 8 to labyrinth seal ring 26, 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 adjusting sleeve 28 being subsequently noted.
In a preferred embodiment, four pairs of jackscrew screw rods 8 are provided with altogether, that is, eight jackscrew screw rods 8 are shared, this
A little jackscrew screw rods 8 are uniformly distributed circumferentially, and disclosure satisfy that all directions adjust demand.
Preferably, as shown in figure 1, the eccentric adjustment system also includes adjustment sleeve, it is installed on the shell cavity 6
Inside, the jackscrew screw rod 8 is used for the lateral wall that sleeve is adjusted described in pushing tow, and the labyrinth seal ring 26 is installed on the tune
In a whole set of cylinder.
Preferably, the adjustment sleeve is eccentric adjusting sleeve 28, and the radially inner side of the eccentric adjusting 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 sealing ring ring seat 27 it is cylindrical
It can be rotated against between the inner cylinder face of cylinder and the eccentric adjusting sleeve 28.When sealing ring ring seat 27 is relative to eccentric adjusting sleeve 28
During rotation, due to the two decentraction, labyrinth seal ring 26 can be caused to deviate its original position, so as to relative to the shape of rotary shaft 1
Into bias.
Preferably, labyrinth seal experimental provision of the invention also includes rotary drive mechanism, for driving the sealing ring
Ring seat 27 rotates relative to the eccentric adjusting sleeve 28, therefore, in specific works, can easily be entered by rotary drive mechanism
The adjustment of row offset.
Preferably, as illustrated in figures 4-5, the rotary drive mechanism includes Worm Wheel System pair, wherein, worm gear 27a is set
Put in the sealing ring ring seat 27 (for example, can be integrally disposed upon in sealing ring ring seat 27, can also be by installing fixation
Mode is arranged in sealing ring ring seat 27), worm screw 40a is arranged on worm shaft 40, and the drive end of the worm shaft 40 protrudes from
Outside the shell cavity 6, in order to apply driving force.
Preferably, labyrinth seal experimental provision of the invention also includes axial compression mechanism, for by the labyrinth seal
Ring 26 is fixed vertically.
Preferably, as Figure 1-3, the axial compression mechanism includes compressing end cap 17, the compression end cap 17 and institute
State and be 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 compression end cap 17 are provided with clamping screw 15 away from the side of the labyrinth seal ring 26.Compress spiral shell
Bar 15 is for example arranged on the big end cap 10 of anti-drive end threadably, and can be entered by clamping screw lock nut 16
Row locking, wherein, the big end cap 10 of anti-drive end, which is arranged on, compresses the axially external of end cap 17.
By compressing end cap 17 described in the pushing tow of clamping screw 15, the compression end cap 17 pushes up through the rolling element 18 again
Push away the sealing ring ring seat 27, you can labyrinth seal ring 26 is compressed vertically spacing, prevent it from play or deflection occurs.Roll
The presence of body 18, it can avoid when sealing ring ring seat 27 rotates rubbing between compression end cap 17.
Preferably, labyrinth seal experimental provision of the invention also includes clearance measurement system, close for measuring the labyrinth
The radial seal gap of seal ring 26, so as to accurately determine the size of its eccentric slot.
Preferably, as shown in Figure 1-2, the clearance measurement system includes eddy current displacement sensor 13, the current vortex
Radial arrangement of the displacement transducer 13 along the labyrinth seal ring 26, and fixed relative to the labyrinth seal ring 26, it is described
External cylindrical surface of the gauge head of eddy current displacement sensor 13 towards the rotating assembly.In specific works, current vortex displacement passes
Sensor 13 and labyrinth seal ring 26 can be considered an entirety, the two relative to the motion of rotating assembly be all the time it is synchronous, therefore,
When labyrinth seal ring 26 corresponds to the eccentric slot increase of the opening position of eddy current displacement sensor 13 or reduced, current vortex displacement
The also synchronous increase or reduction of the distance between sensor 13 and rotating assembly, increase or the amount reduced are labyrinth seal ring 26
The knots modification of offset, it can be specifically easily determined out by eddy current displacement sensor 13.
Preferably, as shown in Figure 1-2, the rotating assembly includes rotary shaft 1 and sealing ring axle sleeve 25, sealing ring axle sleeve 25
Such as it is set in the rotary shaft 1 from one end of rotary shaft 1 and is fixed by means of screw so that the sealing ring axle sleeve 25
All the time 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 setting sealing ring axle sleeve
25, during adjustment can be prevented eccentric because adjustment amount is excessive cause labyrinth seal ring 26 touch with rotary shaft 1 rub injure
Rotary shaft 1, rotary shaft 1 can be also protected by way of sacrificing sealing ring axle sleeve 25, the sealing ring after being damaged because touching and rubbing
Axle sleeve 25 can be changed, without being changed to rotary shaft 1.
Illustrate the exemplary preferred structure of the labyrinth seal experimental provision of the present invention in conjunction with accompanying 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
The big end cap 5a of shell 6, drive end and drive end small end cover 5, wherein, the big end cap 10 of anti-drive end and the big end cap 5a difference of drive end
The axial both ends of shell cavity 6 are arranged on, and are fixed by means of big end cap housing screw 11, the big He of end cap 10 of anti-drive end
The big end cap 5a of drive end is positioned at the both ends of shell cavity 6 by round boss.
Wherein, drive end refers to one end corresponding with the rotary driving force input of rotating assembly.
As shown in figure 1, the rotating assembly of the labyrinth seal experimental provision includes：Rotary shaft 1, drive end axle sleeve 2, first axle
Hold 4 (being preferably deep groove ball bearing), long sleeve 29, bearing inner race short sleeve 32, the axle of second bearing 30 and the 3rd being arranged in pairs
Hold 34 (being preferably angular contact ball bearing) and sealing ring axle sleeve 25.Wherein, drive end axle sleeve 2 is arranged on rotation by screw
In the first end (i.e. drive end, Fig. 1 in be left end) of axle 1, clutch shaft bearing 4 be arranged on the rotary shaft 1 and big end cap 5a of drive end it
Between, for the first end of supporting rotating shaft 1, the inner ring of clutch shaft bearing 4 is fixed by the drive end axle sleeve 2, outside clutch shaft bearing 4
Circle is then fixed by the drive 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.Long sleeve 29 and bearing inner race short sleeve 32 fix clutch shaft bearing 4, second bearing 30 and the
The inner ring of three bearings 34.Clutch shaft bearing 4, second bearing 30 and 3rd bearing 34 complete the supporting positioning to rotary shaft 1 jointly.Its
In, second bearing 30 and 3rd bearing 34 are a pair of anti-angular contact ball bearings filled, the outer ring of second bearing 30 by bearing outside
Circle baffle plate 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 uniform screw
On (i.e. anti-drive end, figure in be right-hand member).
As shown in figure 1, being provided with contact seal part between drive end small end cover 5 and drive end axle sleeve 2, preferably lip seals
3, for being sealed to cavity 1a first end.
Air inlet 7 is arranged on shell cavity 6, the position being presented axially between second bearing 34 and labyrinth seal ring 26
Put place.
As shown in Fig. 2 eddy current displacement sensor 13 passes through the radial direction through hole in sealing ring ring seat 27, and pass through the first lock
The tight locking nut 14 of nut 12 and second is fixed in sealing ring ring seat 27, and the 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 arranged 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 uniform housing screws,
High pressure O-ring is provided between sealing ring ring seat 27 and sealing ring 26, to prevent gas from leaking.To prevent labyrinth seal ring 26 relative
Rotated in sealing ring ring seat 27, stop pin 24, stop pin are provided between labyrinth seal ring 26 and sealing ring baffle ring 23
24 pass axially through sealing ring baffle ring 23 and insert in labyrinth seal ring 26, and stop pin 24 is preferably provided with two, in 180 ° points
Cloth.Worm-gear toothing is provided integrally with sealing ring ring seat 27, so as to form turbine 27a.
Coordinated between eccentric adjusting sleeve 28 and shell cavity 6 using gap, have height between eccentric adjusting sleeve 28 and shell cavity 6
O-ring is pressed, eccentric adjusting sleeve 28 is connected on shell cavity 6 by 16 uniform housing screw 28a.
8 jackscrew screw rods 8 are uniformly distributed circumferentially on shell cavity 6, and the medial extremity of jackscrew screw rod 8 is used for pushing tow bias
The external cylindrical surface of sleeve 28.
As shown in Fig. 2 compressing the inside that end cap 17 is arranged on shell cavity 6, it is between the inner cylinder face of shell cavity 6
Coordinated using gap, and have compress end cap O-ring to prevent gas from leaking between the two.Multiple (being preferably 20) rolling elements
18 by spacing between the progress of rolling element neck bush 19, and rolling element 18 and rolling element neck bush 19 pass through rolling element external pressure
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.
Because 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
The upper opening position between eccentric adjusting sleeve 28 and compression end cap 17.To prevent gas from being leaked and shadow through compressing the periphery of end cap 17
Experimental precision is rung, compresses and compression end cap O-ring is provided between end cap 17 and shell cavity 6.The outer end of gas outlet 22 can connect
Flowmeter, so as to easily measure the leakage rate of labyrinth seal ring 26.
As illustrated in figures 4-5, rotary drive mechanism is specifically configured to：Worm screw 40a and sealing ring ring seat on worm shaft 40
Turbine 27a on 27 is meshed, and so as to be rotated by the rotating band rotary packing ring ring seat 27 of worm shaft 40, 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 arranged on shell cavity 6 by 6 uniform housing screws 35, in worm shaft anti-drive end small end cover 36 and shell cavity
Worm shaft anti-drive end small end cover O-ring 37 is provided between 6, prevents gas overflowing.The anti-drive end of worm shaft 40 passes through snail
Bar axle 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 is then fixed by worm shaft non-driven-end bearing clamp sleeve 39.The drive end of worm shaft 40 leads to
Cross worm shaft drive end bearing 42 to be supported, the outer ring of worm shaft drive end bearing 42 passes through worm shaft drive end small end cover 45
It is fixed, inner ring is then fixed by worm shaft drive end bearing clamp sleeve 41.Worm shaft drive end small end cover 45 is logical
6 uniform housing screws 45 are crossed on shell cavity 6.The drive end of worm shaft 40 passes through worm shaft drive end small end cover
45 and protrude from outside shell cavity 6, to connect actuating unit, such as motor or can be manually rotated mechanism.Driven in worm shaft
Worm shaft drive end small end cover O-ring 43 is provided between end small end cover 45 and shell cavity 6, in worm shaft drive end small end cover
Worm shaft drive 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 on the outside of the big end cap 10 of anti-drive end, and for clamping screw 15 to be locked, clamping screw 15 is used to hold out against pressure
Tight end cap 17, so as to which sealing ring ring seat 27 is pressed on the axial step face of shell cavity 6, prevent that sealing ring ring seat 27 is de-
Fall, while namely prevent labyrinth seal ring 26 from coming off vertically.
The gauge head end face of eddy current displacement sensor 13 is 5mm to the distance of sealing ring axle sleeve 25, and current vortex displacement senses
The trailing wire of device 13 is exported by the through hole on shell cavity 6, and seals the through hole on shell cavity 6 by rubber stopper 9, is prevented
Only gas overflowing.Half rotation is only at most needed because sealing ring ring seat 27 rotates adjustment bias, so can in installation process
Wire is twined into half-turn counterclockwise more, pulled apart wire when preventing eddy current displacement sensor 13 from 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
Measured in advance between the gauge head end face of eddy current displacement sensor 13 and the tooth top of labyrinth seal ring 26 when flowing displacement transducer 13
Radial distance, in real work, the gap width between labyrinth seal ring 26 and sealing axle sleeve 25 is above-mentioned two measurement distance
The difference of value.Ensure 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 just react the clearance distance between labyrinth seal ring 27 and sealing ring axle sleeve 25 exactly, and this measurement gap means can
To measure seal clearance in real time in the case where not taking experimental provision apart.Due to eddy current displacement sensor 13 and sealing ring axle sleeve
Do not contacted between 25, therefore the measurement dynamic labyrinth seal clearance when rotary shaft 1 rotates can be realized.
There is high pressure O-ring between sealing ring ring seat 27 and sealing ring 26, prevent gas from being leaked at this.Sealing ring ring seat 27
On eccentric adjusting sleeve 28, sealing ring ring seat 27 is pressed on eccentric adjusting sleeve 28 by compressing the rolling element on end cap 17,
Wherein between sealing ring ring seat 27 and eccentric adjusting sleeve 28 for small―gap suture coordinate, and for off-centre operation coordinate, sealing ring ring seat 27 with
The step surface being engaged between labyrinth seal ring 26 is concentric interference fits.Labyrinth seal ring 26 is compressed by sealing ring baffle ring 23
There is 0.5mm seal clearance, sealing ring in sealing ring ring seat 27, and between labyrinth seal ring 26 and sealing ring axle sleeve 25
Coordinating between baffle ring 23 and labyrinth seal ring 26 for wide arc gap prevented positioning.
Coordinated between eccentric adjusting sleeve 28 and shell cavity 6 using concentric wide arc gap, the screwing through hole on eccentric adjusting sleeve 28 is straight
Footpath is 9mm, and 8 plane domains are uniformly milled out on the external cylindrical surface of eccentric adjusting sleeve 28, and 8 jackscrew screw rods 8 can act on respectively
On 8 plane domains of eccentric adjusting sleeve 28, eccentric adjusting sleeve 28 can be adjusted to different by adjusting 8 jackscrew screw rods 8
Radial position.There is one of O-ring, effect to determine for auxiliary eccentric adjusting sleeve 28 between eccentric adjusting sleeve 28 and shell cavity 6
The heart, the two of effect is to prevent from overflowing gas at this, and eccentric adjusting sleeve 28 passes through 16 uniform eccentric adjusting sleeve housing screw 28a and connected
Connect and be fixed on shell cavity 6.
The mode that jackscrew screw rod 8 is adjusted bias to eccentric adjusting sleeve 28 is as follows：It is inclined that coarse adjustment sealing is carried out 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 adjusting sleeve 28 can be considered as static element, by bias
Sleeve housing screw 28a unclamps, so that it may above-mentioned static element is elapsed by the uniform jackscrew screw rod 8 of 8 circumferences, so as to change
Becoming seal clearance size, seal clearance is measured by eddy current displacement sensor 13, when reaching the seal eccentric amount specified, then
Eccentric adjusting sleeve housing screw 28a is tightened, eccentric adjusting sleeve 28 is compressed.It is same due to being used between eccentric adjusting sleeve 28 and shell cavity 6
Heart wide arc gap coordinates, and a diameter of 9mm of screwing through hole on eccentric adjusting sleeve 28, eccentric adjusting sleeve housing screw is M8 screws, so partially
Heart sleeve 28, which can be realized, to be moved radially and does not interfere screw.
Compress and coordinated between end cap 17 and the inner circle face of cylinder of shell cavity 6 using gap, compress end cap O-ring 21 and be arranged on
Compress between end cap 17 and shell cavity 6.
The labyrinth seal experimental provision of the present invention can realize that Mechanism of Labyrinth Seal Journal of Sex Research is tested, can offline, online
Adjust labyrinth seal offset, it is possible to achieve on-line measurement seal clearance.
The method of offline coarse adjustment labyrinth seal offset is as follows：Coarse adjustment seal eccentric amount is carried out in assembling stage, using vertical
Formula is installed, and this process is not toward inflating in 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 adjusting sleeve 28 can be considered as
Static element, eccentric adjusting sleeve housing screw 28a is followed closely and unclamped, so that it may by the uniform jackscrew screw rod 8 of 8 circumferences to above-mentioned static element
Elapsed, so as 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 adjusting sleeve housing screw 28a, eccentric adjusting sleeve 28 compressed.In this process, because compressing
End cap 17 is not installed, and sealing ring ring seat 27 is not compacted, and sealing ring ring seat 27 is can be revolved relative to eccentric adjusting sleeve 28
Turn, the offset after adjustment be it is inaccurate, this process simply by the offset of actual use be locked in a scope with
Interior, more accurate offset adjustment is then adjusted by online mode.
On-line tuning labyrinth seal offset method can refer to Fig. 1, Fig. 3 and Fig. 6：What the 1B in Fig. 1, Fig. 3 and Fig. 6 was represented
It is that eccentric adjusting sleeve 28 is cylindrical with the mating surface of the inner circle of shell cavity 6, the mating surface using wide arc gap to coordinate；In Fig. 1, Fig. 3 and Fig. 6
2B represent be the inner circle of eccentric adjusting sleeve 28 and the cylindrical mating surface of sealing ring ring seat 27, the mating surface is matched somebody with somebody using small―gap suture bias
Close；What the 3B in Fig. 1, Fig. 3 and Fig. 6 was represented is the inner circle of sealing ring ring seat 27 and the cylindrical mating surface of labyrinth seal ring 26, and this is matched somebody with somebody
Conjunction face uses concentric interference fits.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 and can be considered overall together, pass through worm shaft 40 and rotary driving force, sealing be provided
Ring ring seat 27, labyrinth seal ring 26 and the entirety of sealing ring baffle ring 23 will be circumferentially rotatable.Due to the inner circle of eccentric adjusting sleeve 28 with it is close
Seal ring ring seat 27 is cylindrical to be coordinated using small―gap suture is eccentric, so different rotation angle, sealing ring ring seat 27, labyrinth seal ring 26 and
Sealing ring baffle ring 23 is overall to produce different offsets, so as 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
It during rotation, can suitably reduce thrust 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 tighten clamping screw 15 and locked with clamping screw lock nut 16.Whole regulation process is off leading to
Gas, after offset is adjusted, then carry out ventilation experiment.
Because the labyrinth seal experimental provision of the present invention has the function of adjustment eccentric slot, a kind of specification can be used
Labyrinth seal ring carries out the experiment under concentric and eccentric two kinds of operating modes, so as to conveniently by experimental study eccentric slot pair
The influence of leakage rate, provided convenience to deploy the research of the sealing mechanism of labyrinth seal.The labyrinth seal experimental provision of the present invention
Can offline, on-line tuning eccentric slot, radial disbalance amount is maximum up to 1mm, and wherein on-line tuning seal eccentric amount can be
Carried out during experimental run, affecting laws of the seal eccentric amount to leakage rate are achieved with without dismounting experimental provision.The experiment fills
Putting can realize that maximum (top) speed is 15000rpm or realizes the harshness that maximum linear velocity is 100m/s, maximum inlet pressure is 3MPa
Seal operating mode.In terms of measurement and data acquisition, seal clearance is measured using eddy current displacement sensor in real time, measurement means are
Non-cpntact measurement, and by capture card gathered data, monitored in real time at remote computer end.
For those skilled in the art it is easily understood that on the premise of not conflicting, above-mentioned each preferred scheme can be free
Ground combination, superposition.
It should be appreciated that above-mentioned embodiment is only illustrative, and not restrictive, without departing from the basic of the present invention
In the case of principle, those skilled in the art can be directed to the various obvious or equivalent modification made of above-mentioned details or replace
Change, be all included in scope of the presently claimed invention.
Claims (10)
- A kind of 1. labyrinth seal experimental provision with eccentric adjustment function, it is characterised in that including：Rotating assembly, for performing rotary motion；Shell cavity, at least a portion of the rotating assembly are located in the shell cavity so that the shell cavity and institute State and form cavity between rotating assembly, the first end of the cavity is sealed by contact seal part, and the second end passes through fan Palace sealing ring is sealed；Eccentric adjustment system, the second end of the cavity is arranged on, for adjusting the offset of the labyrinth seal ring；Air inlet, for the input pressure gas into the cavity；Gas outlet, the gas that the second end for collecting the cavity leaks, to assess the offset of the labyrinth seal ring With the relation of leakage rate.
- 2. labyrinth seal experimental provision according to claim 1, it is characterised in that the eccentric adjustment system includes：The jackscrew screw rod being arranged in pairs, the jackscrew screw rod are arranged radially on the shell cavity, and each pair jackscrew spiral shell Bar be located at the shell cavity it is same diametrically, for adjusting the radial direction position of the labyrinth seal ring along the diametric(al) Put.
- 3. labyrinth seal experimental provision according to claim 2, it is characterised in that the eccentric adjustment system also includes：Sleeve is adjusted, is installed on the inside of the shell cavity, the jackscrew screw rod is used for the outside that sleeve is adjusted described in pushing tow Wall, the labyrinth seal ring are installed in the adjustment sleeve.
- 4. labyrinth seal experimental provision according to claim 3, it is characterised in that the adjustment sleeve is eccentric adjusting sleeve, The radially inner side of the eccentric adjusting sleeve is provided with sealing ring ring seat, and the labyrinth seal ring is fixed relative to the sealing ring ring seat Installation, can be rotated against between the external cylindrical surface of the sealing ring ring seat and the inner cylinder face of the eccentric adjusting sleeve.
- 5. labyrinth seal experimental provision according to claim 4, it is characterised in that also including rotary drive mechanism, be used for The sealing ring ring seat is driven to be rotated relative to the eccentric adjusting sleeve.
- 6. labyrinth seal experimental provision according to claim 5, it is characterised 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 is protruded from outside the shell cavity.
- 7. the labyrinth seal experimental provision according to one of claim 1-6, it is characterised in that also including axial compression machine Structure, for the labyrinth seal ring to be fixed vertically.
- 8. labyrinth seal experimental provision according to claim 7, it is characterised in that the axial compression mechanism includes compressing End cap, described compress are provided with rolling element between end cap and the mounting structure of the labyrinth seal ring, the back of the body for compressing end cap Side from the labyrinth seal ring is provided with clamping screw.
- 9. the labyrinth seal experimental provision according to one of claim 1-8, it is characterised in that also including 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 being set in the rotary shaft, the labyrinth seal Ring is located at the radial outside of the sealing ring axle sleeve.
- 10. labyrinth seal experimental provision according to claim 9, it is characterised in that the clearance measurement system includes electricity Eddy displacement sensor, radial arrangement of the eddy current displacement sensor along the labyrinth seal ring, the current vortex displacement External cylindrical surface of the gauge head of sensor towards the rotating assembly.Preferably, when the rotating assembly includes sealing ring axle sleeve, 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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| CN109029211A (en) * | 2018-07-26 | 2018-12-18 | 柳州上汽汽车变速器有限公司 | The measuring instrument and measurement method of speed changer shaft axial gap |
| CN109141773A (en) * | 2018-07-25 | 2019-01-04 | 沈阳航空航天大学 | A kind of experimental provision of the adaptive concentric performance of measurement dynamic sealing |
| CN111964849A (en) * | 2020-08-06 | 2020-11-20 | 绍兴淼汇能源科技有限公司 | Labyrinth seal experimental device |
| CN113155374A (en) * | 2021-05-20 | 2021-07-23 | 中铁工程装备集团有限公司 | Main drive sealing experiment table of heading machine and application method thereof |
| CN113252297A (en) * | 2021-05-07 | 2021-08-13 | 沈阳工业大学 | Testing arrangement of labyrinth seal experiment with adjustable axial |
| CN114046987A (en) * | 2022-01-13 | 2022-02-15 | 清华大学 | Multi-physical quantity measurement test device for rotating shaft sealing |
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