CN107448611A - The labyrinth gland in adjustable sealing gap - Google Patents
The labyrinth gland in adjustable sealing gap Download PDFInfo
- Publication number
- CN107448611A CN107448611A CN201710888694.0A CN201710888694A CN107448611A CN 107448611 A CN107448611 A CN 107448611A CN 201710888694 A CN201710888694 A CN 201710888694A CN 107448611 A CN107448611 A CN 107448611A
- Authority
- CN
- China
- Prior art keywords
- broach seat
- plate
- annular
- pull ring
- broach
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 53
- 210000004907 gland Anatomy 0.000 title claims abstract description 49
- 230000008602 contraction Effects 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 9
- 239000002699 waste material Substances 0.000 abstract description 6
- 238000009960 carding Methods 0.000 description 15
- 239000007789 gas Substances 0.000 description 9
- 238000012856 packing Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000008961 swelling Effects 0.000 description 3
- 239000000567 combustion gas Substances 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 210000001520 comb Anatomy 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000010339 dilation Effects 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Classifications
-
- 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
- F16J15/44—Free-space packings
- F16J15/447—Labyrinth packings
- F16J15/4476—Labyrinth packings with radial path
-
- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/029—Gearboxes; Mounting gearing therein characterised by means for sealing the gearboxes, e.g. to improve airtightness
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
A kind of labyrinth gland in adjustable sealing gap, include the broach seat push-pull ring of annular, the outside of broach seat push-pull ring is provided with the outer ring of annular, the left end side of broach seat push-pull ring is connected with the inner end of Zola's plate of annular, the right-hand member side of broach seat push-pull ring is connected with the inner end of the right pulling plate of annular, the left end side of outer ring is connected with the outer end of Zola's plate of annular, the right-hand member side of outer ring is connected with the outer end of the right pulling plate of annular, broach seat push-pull ring, Zola's plate, right pulling plate and outer corral form an annular pressure duty chamber, the annular ring inner ring of broach seat push-pull ring is arranged with multiple broach seats, the outer end of broach seat is fixedly linked with broach seat push-pull ring, broach seat can be radially movable in the presence of broach seat push-pull ring.Its object is to provide a kind of leakage rate that can effectively reduce sealing system, the energy waste of equipment in the process of running is reduced, improves the labyrinth gland in the adjustable sealing gap of the service life of labyrinth seal.
Description
Technical field
The present invention relates to a kind of labyrinth gland in adjustable sealing gap.
Background technology
Labyrinth seal is also referred to as labyrinth seal, belongs to non-contacting seal.It is mainly used in sealing gas medium, in steam turbine,
As interstage seal, shaft end seal and the sealing of leaf top in the machines such as gas turbine, centrifugal compressor, air blower, or other are dynamic
The preposition sealing of sealing, there is extensive purposes.The leakage rate of labyrinth seal is directly proportional to the size for the backlash that throttles, from sealing
It can consider, it is desirable to which the backlash that throttles is as smaller as possible, because the leakage rate increase of labyrinth seal, can cause substantial amounts of energy waste.
But if by the very little of backlash design that throttles, for the longer equipment of the rotating shafts such as steam turbine, gas turbine, it is starting and stopped
During rotation, the rotating speed of rotating shaft is needed during change by more than one critical speed, attached in critical speed
Closely, the vibration of rotating shaft can increased dramatically, and thus can cause broach and rotating shaft generation friction or even collision, cause the backlash change that throttles
Greatly, it could even be possible to labyrinth seal loss of seal effect can allow because broach fractures.Therefore, starting and stopping to turn for those
The larger equipment of rotating shaft bounce in dynamic process, people have to the bigger of the throttling backlash design of its labyrinth seal, by
This causes the energy waste of equipment in the process of running larger.For large-size steam turbine, in certifiable loss in efficiency, 40%
It is due to that labyrinth clearance is excessive caused.
The content of the invention
It is an object of the invention to provide a kind of leakage rate that can effectively reduce sealing system, the thermal efficiency of steam turbine is reduced
Loss, reduce the energy waste of equipment in the process of running, the fan for improving the adjustable sealing gap of the service life of labyrinth seal
Palace sealing device.
The labyrinth gland in the adjustable sealing gap of the present invention, include the broach seat push-pull ring of annular, broach seat push-and-pull
The outside of circle is provided with the outer ring of annular, and the left end side of broach seat push-pull ring is connected with the inner end of Zola's plate of annular, broach seat
The right-hand member side of push-pull ring is connected with the inner end of the right pulling plate of annular, the left end side of outer ring and the outer end phase of Zola's plate of annular
Even, the right-hand member side of outer ring is connected with the outer end of the right pulling plate of annular, broach seat push-pull ring, Zola's plate, right pulling plate and outer corral
An annular pressure duty chamber is formed, the wall of pressure duty chamber is provided with flow media and adds mouth, the ring of broach seat push-pull ring
Shape circle inner ring is arranged with multiple broach seats, is provided with more than one carding tooth plate side by side on each broach seat, carding tooth plate extends inwards
The center of broach seat push-pull ring is pointed to, the outer end of broach seat is connected with the installation of broach seat push-pull ring by broach seat connector, combed
Toothholder push-pull ring is provided with more than one inflatable contraction section, and broach seat can radially be transported in the presence of broach seat push-pull ring
It is dynamic.
The labyrinth gland in the adjustable sealing gap of the present invention, in addition to support, field ring are set around multiple broach seats,
Support is provided with the outer ring card holding trough of annular towards the surface of broach seat, and the outer ring is fixedly mounted in the card holding trough of outer ring, combs
Toothholder connector is screw or rivet or the shackle member with neck, and the inflatable contraction section on broach seat push-pull ring is in for plate face
Undulatory arc, the plate face of corrugated arc are located on broach seat push-pull ring towards the center of broach seat push-pull ring
More than one inflatable contraction section is provided between two adjacent broach seat connectors.
The labyrinth gland in the adjustable sealing gap of the present invention, wherein the middle part of the lateral wall of each broach seat
Not She You arc inner ring locating slot, the splicing that joins end to end of multiple inner ring locating slots circularized, and the broach seat push-pull ring is set
In the inner ring locating slot of annular.
The labyrinth gland in the adjustable sealing gap of the present invention, wherein the broach seat push-pull ring and outer ring are radially
Rectangular cross-section.
The present invention adjustable sealing gap labyrinth gland, wherein the pressure duty intracavitary filled with liquid and/
Or solid granular medium, solid granular medium can flow under the effect of the pressure.
The labyrinth gland in the adjustable sealing gap of the present invention, pass through wherein the fluid of the pressure duty chamber adds mouth
Pipeline is connected with that can transmit the flow media injection device of pressure.
The labyrinth gland in the adjustable sealing gap of the present invention, wherein the plate face of Zola's plate is middle part circumferentially side
To heave to the left or arc, the plate face of the right pulling plate is the arc that middle part is along the circumferential direction heaved to the right, Zola's plate
It is located at right pulling plate in the card holding trough of outer ring.
The labyrinth gland in the adjustable sealing gap of the present invention, wherein the plate face of Zola's plate is middle part circumferentially side
To the arc heaved to the right, the plate face of the right pulling plate is the arc that middle part is along the circumferential direction heaved to the left, Zola's plate and
Right pulling plate is located in the card holding trough of outer ring.
The labyrinth gland in the adjustable sealing gap of the present invention, wherein the plate face of Zola's plate is middle part circumferentially side
To the arc heaved to the left, the plate face of the right pulling plate is the arc that middle part is along the circumferential direction heaved to the right.
The labyrinth gland in the adjustable sealing gap of the present invention, wherein the plate face of Zola's plate is middle part circumferentially side
To the arc heaved to the right, the plate face of the right pulling plate is the arc that middle part is along the circumferential direction heaved to the left.
Labyrinth gland made of the labyrinth gland in the adjustable sealing gap of the present invention, is especially suitable for steamer
The steam packing of the longer equipment of the rotating shafts such as machine, gas turbine.The labyrinth gland in the adjustable sealing gap of the present invention is used
The steam turbine of manufactured labyrinth gland, gas turbine, during starting and stopping operating, for steam turbine, combustion gas
The longer equipment of the rotating shafts such as turbine, before starting and stopping operating, pressure duty chamber can be allowed to be in the original position of unswollen state
State, broach seat push-pull ring is allowed to be moved radially outwards with broach seat 1, then, each carding tooth plate also can be with broach seat edge
It is moved radially outward, allows throttling backlash to increase, so as to allows rotating shaft by vibrating the rotational phase that increased dramatically.When the rotation of rotating shaft
After steady, then make pressure duty chamber be in swelling state, allow broach seat push-pull ring to promote broach seat to move radially inward, in
It is that each carding tooth plate can also move radially inward with broach seat, allows throttling backlash to return to setting position.Due to avoiding
The stage that shaft vibration increased dramatically, can be by the very small of the throttling backlash design of labyrinth seal, therefore, the present invention can be effective
The leakage rate of sealing system is reduced, reduces the efficiency losses of steam turbine, the energy waste of equipment in the process of running is reduced, carries
The service life of high labyrinth seal.Experiment shows that the present invention can carry the mechanical efficiency of large-size steam turbine on existing basis
High 1% -2%.
The present invention adjustable sealing gap labyrinth gland other details and feature can by read below in conjunction with
The embodiment that accompanying drawing encyclopaedizes can be cheer and bright.
Brief description of the drawings
Fig. 1 is a kind of main view profile of the structural representation of embodiment of the labyrinth seal of the present invention；
Fig. 2 is Fig. 1 A-A profiles；
Fig. 3 is the main view profile of the structural representation of the another embodiment of the labyrinth seal of the present invention.
Embodiment
As shown in Figure 1, Figure 2 and Figure 3, the labyrinth gland in adjustable sealing gap of the invention, the broach of annular is included
Seat push-pull ring 1, broach seat push-pull ring 1 preferred annular or ellipse or other annulars, broach seat push-pull ring 1 it is outer
Side is provided with the outer ring 2 of annular, and outer ring 2 be arranged in parallel with broach seat push-pull ring 1, that is, concentric shafts are set.
The left end side of broach seat push-pull ring 1 is connected with the inner end of Zola's plate 3 of annular, typically uses and is weldingly connected,
Broach seat push-pull ring 1 can also be that the sheet metal for forming broach seat push-pull ring 1 and Zola's plate 3 uses together in itself with Zola's plate 3
The material of sample and the structure being connected as one；
The right-hand member side of broach seat push-pull ring 1 is connected with the inner end of the right pulling plate 4 of annular, typically uses and is weldingly connected,
Broach seat push-pull ring 1 can also be that the sheet metal for forming broach seat push-pull ring 1 and right pulling plate 4 uses together in itself with right pulling plate 4
The material of sample and the structure being connected as one；
The left end side of outer ring 2 is connected with the outer end of Zola's plate 3 of annular, typically uses and is weldingly connected, outer ring 2 and a left side
Arm-tie 3 can also form the sheet metal of outer ring 2 and Zola's plate 3 in itself using same material and the knot that is connected as one
Structure；
The right-hand member side of outer ring 2 is connected with the outer end of the right pulling plate 4 of annular, typically uses and is weldingly connected, outer ring 2 and the right side
Arm-tie 4 can also form the sheet metal of outer ring 2 and right pulling plate 4 in itself using same material and the knot that is connected as one
Structure；
Broach seat push-pull ring 1, Zola's plate 3, right pulling plate 4 and outer ring 2, which are enclosed, forms an annular pressure duty chamber 10, pressure
The wall of working chamber 10 is provided with flow media and adds mouth, when the fluid media (medium) for having the external world enters pressure duty 10 inside of chamber, pressure
The volume of power working chamber 10 will make elastic deformation under the effect of the pressure and outwards expand, the fluid inside pressure duty chamber 10
When medium flows out, when pressure duty chamber 10 because the volume for outwards expanding and increasing can be on broach seat push-pull ring 1, Zola's plate 3, the right side
As the original position that elastic deformation is returned to before not expanding under the collective effect of arm-tie 4 and outer ring 2；
The annular ring inner ring of broach seat push-pull ring 1 is arranged with multiple broach seats 5, and one is provided with side by side on each broach seat 5
Or multiple carding tooth plates 6 or hairbrush or steel brush, carding tooth plate 6 extend the center for pointing to broach seat push-pull ring 1 inwards, broach seat 5 it is outer
End is connected by broach seat connector (being not drawn into figure) with the installation of broach seat push-pull ring 1, and broach seat push-pull ring 1 is provided with one
Inflatable contraction section 12 above, broach seat 5 can be radially movable in the presence of broach seat push-pull ring 1.
When pressure duty chamber 10 increases volume due to outwards expanding, broach seat push-pull ring 1 will promote each broach
Seat 5 moves radially inward, allows the inner end of carding tooth plate 6 close to steam turbine or gas turbine or centrifugal compressor or air blower etc.
The rotating shaft 11 of machine, the side of now adjacent carding tooth plate 6 are closely affixed each other, the inner ends of multiple carding tooth plates 6 and rotating shaft 11 it
Between form optimal seal clearance, when the volume that pressure duty chamber 10 is set back due to pressure release, broach seat push-pull ring 1 is just
Each broach seat 5 can be pulled to move radially outwards, allow the inner end of carding tooth plate 6 away from steam turbine or gas turbine or centrifugal pressure
The rotating shaft 11 of the machine such as contracting machine or air blower, rotating shaft 11 can be rotated in the state of axially larger bounce without contacting broach
The inner end of piece 6.
Present invention additionally comprises support 7, support 7 is set around multiple broach seats 5, and support 7 is towards setting on the surface of broach seat 5
There is the outer ring card holding trough 8 of annular, the outer ring 2 is arranged in outer ring card holding trough 8, and broach seat connector can be screw or rivet
Or the shackle member with neck, the method for fixed installation can be mode connects for screw or rivet interlacement or neck connection etc., broach seat
Inflatable contraction section 12 on push-pull ring 1 is the corrugated arc of plate face, and the plate face of corrugated arc is towards broach
The center of seat push-pull ring 1, on broach seat push-pull ring 1 positioned at two adjacent broach seat connectors between provided with it is more than one can
Dilation section.
As a further improvement on the present invention, it is respectively equipped with the interior of arc in the middle part of the lateral wall of above-mentioned each broach seat 1
Locating slot 9 is enclosed, the splicing that joins end to end of multiple inner ring locating slots 9 circularizes, and the broach seat push-pull ring 1 is fixedly mounted on annular
In inner ring locating slot 9, the method for fixed installation can be mode connects for screw or rivet interlacement or bonding or neck connection etc..
As a further improvement on the present invention, the rectangular cross-section of above-mentioned broach seat push-pull ring 1 and outer ring 2 radially.
As a further improvement on the present invention, it is situated between in above-mentioned pressure duty chamber 10 filled with liquid and/or solid granular
Matter, solid granular medium can flow under the effect of the pressure.Solid granular medium can be the rolling that diameter is less than 0.5 millimeter
Pearl, or Hmp grease.
As a further improvement on the present invention, the fluid of above-mentioned pressure duty chamber 10 adds mouth by pipeline and can transmit pressure
The flow media injection device of power is connected.
As a further improvement on the present invention, as shown in figure 3, the plate face of above-mentioned Zola's plate 3 be middle part along the circumferential direction to
A left side heave or arc, the plate face of the right pulling plate 4 is the arc that middle part is along the circumferential direction heaved to the right, the He of Zola's plate 3
Right pulling plate 4 is located in outer ring card holding trough 8, and Zola's plate 3 therein, right pulling plate 4 can play a part of back-moving spring.
As a further improvement on the present invention, as shown in figure 1, the plate face of above-mentioned Zola's plate 3 be middle part along the circumferential direction to
The arc that the right side is heaved, the plate face of the right pulling plate 4 are the arc that middle part is along the circumferential direction heaved to the left, Zola's plate 3 and the right side
Arm-tie 4 is located in outer ring card holding trough 8, and Zola's plate 3 therein, right pulling plate 4 can play a part of back-moving spring.
The above-mentioned plate face by Zola's plate 3, right pulling plate 4 is designed to arc, is larger in order to allow pressure duty chamber 10 to have
Expansion space and resilience space, and then also allow for broach seat push-pull ring 1 and can have larger radial direction position when pushing or pulling on broach seat 5
Move.
But Zola's plate 3, the plate face of right pulling plate 4 are not necessarily meant to be designed to arc, even if Zola's plate 3, the plate of right pulling plate 4
Face be it is flat, the expansion of pressure duty chamber 10 can also make broach seat push-pull ring 1 inwards, outer ring 2 outwards expanded, and then allows comb
Toothholder push-pull ring 1 pushes or pull on broach seat 5 and makees radial displacement, and the distance of radial displacement should not be very big, as long as generally 1-2 millis
Rice.
When pressure duty chamber 10 is in swelling state, adjacent carding tooth plate 6 or hairbrush or steel brush on different broach seats 1
End be mutually close together the broach that circularizes of combination or sealing hairbrush, sealing steel brush, have between adjacent broach swollen
Swollen cavity 12, when pressure duty chamber 10 is in the home state of unswollen state, each broach seat 1 and carding tooth plate 6 edge respectively
It is moved radially outward, is separated from each other between the end of adjacent broach seat 1, is separated from each other between the end of adjacent carding tooth plate 6.
In the prior art, for steam turbine when starting, crossing critical speed in stopping process, rotor amplitude is larger, if packing
Radially installed gap is smaller, and gland sealing gear is easy to wear；After gland sealing gear is worn, because shaft-packing leakage amount is larger, steam pair
The heated zones of axle be increased, and temperature is also raised, and swollen difference is become big, the high and low tooth hair of axle convex platform and gland blocks
Give birth to relative displacement and lodge, cause steam loss to increase, sealing effectiveness cannot be guaranteed；Use adjustable sealing gap of the invention
Labyrinth gland made of labyrinth gland, then the appearance of above-mentioned problem in the prior art can be reduced or avoided.
When gland sealing gear touches mill with axle, moment produces amount of heat, causes axle hot-spot, in some instances it may even be possible to cause big axle
Bending.So in unit maintenance, power plant can only tune up packing radial clearance, ensure unit to sacrifice economy as cost
Security；Using the present invention adjustable sealing gap labyrinth gland made of labyrinth gland, then can reduce or
Avoid the appearance of above-mentioned problem in the prior art.
The inhomogeneities of labyrinth seal annular compartment, it is the major reason for producing flow-induced vibration, and turbine high-pressure rotor
Caused flow-induced vibration once is difficult to solve, and jeopardizes the safe operation of unit；Spring is bad, or is broken,
Air leakage is caused to increase；The abrasion of packing is permanent；Use the labyrinth gland system in the adjustable sealing gap of the present invention
Into labyrinth gland, then the appearance of above-mentioned problem in the prior art can be reduced or avoided.
The quality of packing performance, the economy of unit is not only influenceed, and influence the reliability of unit；Steamed between stage
Vapour, which is revealed, causes unit internal efficiency to reduce；Packing reveals the interference to liquid main flow, causes the change of field；Use this hair
Labyrinth gland made of the labyrinth gland in bright adjustable sealing gap, then can be reduced or avoided it is above-mentioned in the prior art
The appearance of problem.
In addition to wasting the steam of a large amount of high-quality, leakage steam enters bearing housing and can also made in oil the steam leakage of axle envelope
Band water, oil emulsification, lubricating oil film degradation, destroys dynamically lubricating effect, causes oil whip, cause unit vibration even
Bearing liner burnout is shut down；Water inlet may also result in regulating member corrosion bite in oil, jeopardize unit safety；Use the adjustable dense of the present invention
Labyrinth gland made of sealing the labyrinth gland in gap, then can be reduced or avoided going out for above-mentioned problem in the prior art
It is existing.
Labyrinth gland made of the labyrinth gland in the adjustable sealing gap of the present invention, is especially suitable for steamer
The steam packing of the longer equipment of the rotating shafts such as machine, gas turbine.The labyrinth gland in the adjustable sealing gap of the present invention is used
The steam turbine of manufactured labyrinth gland, gas turbine, during starting and stopping operating, for steam turbine, combustion gas
The longer equipment of the rotating shafts such as turbine 11, before starting and stopping operating, pressure duty chamber 10 can be allowed to be in unswollen state
Home state, broach seat push-pull ring 1 is allowed to be moved radially outwards with broach seat 1, then, each carding tooth plate 6 also can be with comb
Toothholder 1 is moved radially outwards, and allows throttling backlash to increase, so as to allow rotating shaft 11 by vibrating the rotational phase that increased dramatically.When
After the stability of rotation of rotating shaft 11, then make pressure duty chamber 10 be in swelling state, allow broach seat push-pull ring 1 to promote the edge of broach seat 1
Move radially inwards, then, each carding tooth plate 6 can also move radially inward with broach seat 1, allow throttling backlash to return to and set
Positioning is put.The stage that increased dramatically due to avoiding shaft vibration, can by labyrinth seal throttling backlash design it is very small,
Therefore, the leakage rate of sealing system can be effectively reduced, the energy waste of equipment in the process of running is reduced, improves labyrinth seal
Service life.
The above-described embodiments are merely illustrative of preferred embodiments of the present invention, not to the structure of the present invention
Think and scope is defined, under the premise of design concept of the present invention is not departed from, ordinary skill technical staff is to this hair in this area
The all variations and modifications that bright technical scheme is made, protection scope of the present invention, the claimed skill of the present invention all should be fallen into
Art content, all record in detail in the claims.
Claims (10)
1. the labyrinth gland in adjustable sealing gap, it is characterised in that include the broach seat push-pull ring (1) of annular, broach seat pushes away
The outside of circle (1) is drawn to be provided with the outer ring (2) of annular, the left end side of broach seat push-pull ring (1) and Zola's plate (3) of annular are inner
End is connected, and the right-hand member side of broach seat push-pull ring (1) is connected with the inner end of the right pulling plate (4) of annular, the left end side of outer ring (2)
It is connected with the outer end of Zola's plate (3) of annular, the right-hand member side of outer ring (2) is connected with the outer end of the right pulling plate (4) of annular, broach
Seat push-pull ring (1), Zola's plate (3), right pulling plate (4) and outer ring (2) are enclosed and form an annular pressure duty chamber (10), pressure work
The wall for making chamber (10) is provided with flow media addition mouth, and the annular ring inner ring of broach seat push-pull ring (1) is arranged with multiple broach seats
(5), the outer end of broach seat (5) is connected by broach seat connector with broach seat push-pull ring (1) installation, broach seat push-pull ring (1)
More than one inflatable contraction section is provided with, broach seat (5) can be radially movable in the presence of broach seat push-pull ring (1).
2. the labyrinth gland in adjustable sealing gap according to claim 1, it is characterised in that also including support (7),
Support (7) is set around multiple broach seats (5), and support (7) is provided with the outer ring card holding trough of annular towards the surface of broach seat (5)
(8), the outer ring (2) is fixedly mounted in outer ring card holding trough (8), and broach seat connector is screw or rivet or has neck
Shackle member, the inflatable contraction section on broach seat push-pull ring (1) are the corrugated arc of plate face, corrugated arc
Plate face is towards the center of broach seat push-pull ring (1), on broach seat push-pull ring (1) between two adjacent broach seat connectors
Provided with more than one inflatable contraction section.
3. the labyrinth gland in adjustable sealing gap according to claim 2, it is characterised in that each broach seat
(1) the inner ring locating slot (9) of arc is respectively equipped with the middle part of lateral wall, multiple inner ring locating slots (9), which join end to end, to be spliced into
Annular, the broach seat push-pull ring (1) are arranged in the inner ring locating slot (9) of annular.
4. the labyrinth gland in adjustable sealing gap according to claim 3, it is characterised in that the broach seat push-and-pull
Enclose the rectangular cross-section of (1) and outer ring (2) radially.
5. the labyrinth gland in adjustable sealing gap according to claim 4, it is characterised in that the pressure duty chamber
(10) liquid and/or solid granular medium are filled with, solid granular medium can flow under the effect of the pressure.
6. the labyrinth gland in the adjustable sealing gap according to any one of claim 1 to 5, it is characterised in that institute
The fluid addition mouth for stating pressure duty chamber (10) is connected by pipeline with that can transmit the flow media injection device of pressure.
7. the labyrinth gland in adjustable sealing gap according to claim 6, it is characterised in that Zola's plate (3)
Plate face be middle part along the circumferential direction heave to the left or arc, the plate face of the right pulling plate (4) for middle part along the circumferential direction to
The arc that the right side is heaved, Zola's plate (3) and right pulling plate (4) are located in outer ring card holding trough (8).
8. the labyrinth gland in adjustable sealing gap according to claim 6, it is characterised in that Zola's plate (3)
Plate face is the arc along the circumferential direction heaved to the right of middle part, the plate face of the right pulling plate (4) for middle part along the circumferential direction to the left
The arc heaved, Zola's plate (3) and right pulling plate (4) are located in outer ring card holding trough (8).
9. the labyrinth gland in the adjustable sealing gap according to any one of claim 1 to 5, it is characterised in that institute
The plate face for stating Zola's plate (3) is the arc that middle part is along the circumferential direction heaved to the left, and the plate face of the right pulling plate (4) is middle part edge
The arc that circumferencial direction is heaved to the right.
10. the labyrinth gland in the adjustable sealing gap according to any one of claim 1 to 5, it is characterised in that
The plate face of Zola's plate (3) is the arc that middle part is along the circumferential direction heaved to the right, and the plate face of the right pulling plate (4) is middle part
The arc along the circumferential direction heaved to the left.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710888694.0A CN107448611B (en) | 2017-09-27 | 2017-09-27 | Labyrinth sealing device with adjustable sealing gap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710888694.0A CN107448611B (en) | 2017-09-27 | 2017-09-27 | Labyrinth sealing device with adjustable sealing gap |
Publications (2)
| Publication Number | Publication Date |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109695482A (en) * | 2018-12-28 | 2019-04-30 | 孟金来 | Trailing type encapsulating method and device |
| CN113252297A (en) * | 2021-05-07 | 2021-08-13 | 沈阳工业大学 | Testing arrangement of labyrinth seal experiment with adjustable axial |
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| CN113252297A (en) * | 2021-05-07 | 2021-08-13 | 沈阳工业大学 | Testing arrangement of labyrinth seal experiment with adjustable axial |
| CN113252297B (en) * | 2021-05-07 | 2022-07-08 | 沈阳工业大学 | Axial adjustable testing device for labyrinth seal experiment |
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| CN107448611B (en) | 2024-05-24 |
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