CN114001215B - Vibration isolation sealing device - Google Patents
Vibration isolation sealing device Download PDFInfo
- Publication number
- CN114001215B CN114001215B CN202111637672.XA CN202111637672A CN114001215B CN 114001215 B CN114001215 B CN 114001215B CN 202111637672 A CN202111637672 A CN 202111637672A CN 114001215 B CN114001215 B CN 114001215B
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- China
- Prior art keywords
- movable sleeve
- connecting seat
- spray pipe
- connecting screw
- ring
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- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L27/00—Adjustable joints, Joints allowing movement
- F16L27/12—Adjustable joints, Joints allowing movement allowing substantial longitudinal adjustment or movement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L41/00—Branching pipes; Joining pipes to walls
- F16L41/08—Joining pipes to walls or pipes, the joined pipe axis being perpendicular to the plane of the wall or to the axis of another pipe
- F16L41/086—Joining pipes to walls or pipes, the joined pipe axis being perpendicular to the plane of the wall or to the axis of another pipe fixed with screws
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention belongs to the technical field of large free jet test equipment connection and vibration suppression, and discloses a vibration isolation sealing device which comprises a movable sleeve and a support component, wherein one end of the movable sleeve is fixedly arranged on a spray pipe through a connecting bolt, the other end of the movable sleeve is axially and slidably connected with the support component, an inflatable sealing surrounding belt is arranged between the contact surface of the movable sleeve and the spray pipe, and the support component is fixedly arranged in a test chamber; the invention has reasonable design and smart structure, can realize axial displacement clearance compensation in large-scale free jet test equipment, adopts a stronger movable sleeve supporting structure to avoid the problem of exciting vibration during air flow disturbance possibly caused by rigidity mutation, and has smart structure and convenient installation and maintenance.
Description
Technical Field
The invention relates to a vibration isolation sealing device used between sections of large-scale free jet test equipment, belongs to the technical field of test equipment connection and vibration suppression, and particularly relates to a vibration isolation sealing device which is used for simulation tests of an air inlet channel of an aircraft and the like.
Background
In a free jet environment test, the outlet of the spray pipe is a test nozzle, and the spray pipe needs to be inserted into a test cabin, so that the sealing treatment between the spray pipe and the test cabin is difficult; meanwhile, the axial load of the nozzle is very large during operation, particularly in a high Mach number state, and the axial deformation is inevitably generated, so that the axial load is very difficult to bear only by improving the strength and rigidity of the section; in addition, the working environment of the outlet of the spray pipe is severe, and the airflow disturbance can generate vibration, particularly under the condition of transonic speed, so that certain measures must be taken to solve the problem that the connection, movement and vibration isolation among the three can carry out axial compensation and have vibration suppression capability under the precondition of reliable sealing. The following is generally used:
1. a metal corrugated pipe compensator. The connection and the sealing between the sections are realized by the mode of adding the sealing strips on the flanges at the two ends of the metal corrugated pipe, the axial compensation is carried out through the deformation of the corrugated joint, but the rigidity between the sections is suddenly changed due to the limitation of the rigidity of the corrugated joint, the vibration is easily excited during the air flow disturbance, and the risk is larger under the condition that the air flow disturbance cannot be estimated.
2. Axial sleeve + rubbing spring plate. One end of the axial sleeve is connected with the spray pipe in a mode that an end flange is sealed by a sealing strip, the other end of the axial sleeve is also provided with a connecting flange, the flange connecting surface and the test chamber connecting surface are coplanar, the connection and the sealing between the sections are realized through the connecting flange and the sealing strip at the two ends of the spring plate, the spring plate with the semicircular section is arranged in the radial dimension difference of the two sections, the compensation of the axial displacement is carried out by utilizing the elasticity of the spring plate, but the problem of discontinuous rigidity of the spring plate is solved by fillet transition on the one hand for a large-diameter channel, particularly a channel with a square section, on the other hand, the embodying of the elasticity performance of the spring plate is greatly influenced by assembly, the expansion amount is limited, the fatigue damage is easy to generate, the installation and the maintenance are inconvenient, and the problem that the vibration is easy to excite when the air flow is disturbed like a metal corrugated pipe compensator can also occur.
Disclosure of Invention
Therefore, in order to solve the defects, the invention provides the vibration isolation sealing device which is reasonable in design, ingenious in structure and capable of realizing axial displacement gap compensation in large-scale free jet test equipment.
In particular to a vibration isolation sealing device which comprises a movable sleeve and a supporting component,
one end of the movable sleeve is fixedly arranged on the spray pipe through a connecting bolt, while the other end is axially connected with the supporting component in a sliding way,
an inflatable sealing shroud is arranged between the contact surface of the movable sleeve and the spray pipe,
the supporting component is fixedly arranged on the test chamber.
Preferably, the support assembly includes a third connection seat and a compression ring,
the third connecting seat is connected to the test chamber through a connecting bolt and is inserted into the end part of the movable sleeve to support the movable sleeve;
the compression ring is arranged on the periphery of the third connecting seat and radially limits the movable sleeve arranged on the third connecting seat;
preferably, a polytetrafluoroethylene ring sleeved on the third connecting seat is arranged between the third connecting seat and the movable sleeve, and the purpose of the arrangement is to reduce the friction resistance of the movable sleeve.
Preferably, an O-ring seal mounted on the movable sleeve is arranged between the movable sleeve and the compression ring, and the O-ring seal is arranged to ensure that the movable sleeve can ensure the sealing of the test chamber with the outside when moving.
Preferably, the upper end of the movable sleeve is respectively provided with a first connecting screw and a second connecting screw,
a first connecting seat matched with the first connecting screw rod is arranged on the spray pipe, wherein the first connecting screw rod penetrates through the first connecting seat and is connected through a nut,
be provided with the second connecting seat that matches with second connecting screw on the test chamber, this second connecting seat is seted up axial and is used for installing second connecting screw mounting groove to realize through the nut that second connecting screw is connected with the second connecting seat, this nut is in the state of screwing except that being in when changing the inflatable seal shroud, all the other times all is in not hard up state. The first connecting screw and the second connecting screw are respectively matched with the first connecting seat and the second connecting seat and are connected through nuts, and the arrangement aims at installing and maintaining the movable sleeve, and simultaneously, the inflatable sealing surrounding belt is convenient to replace, so that the temporary fixation of the movable sleeve is realized; in the normal experiment process, the second connecting screw and the second connecting screw are in a movable state (the nut is in a loose state) and have an axial gap so as to facilitate the axial movement of the movable sleeve.
The invention has the following advantages:
the invention has reasonable design and skillful structure, can realize the clearance compensation of 5mm of axial displacement in large-scale free jet test equipment, and has reliable sealing; the stronger movable sleeve supporting structure avoids the problem of exciting vibration during airflow disturbance possibly caused by rigidity abrupt change.
Drawings
FIG. 1 is a schematic view of the assembled structure of the present invention;
FIG. 2 is a schematic cross-sectional view A-A of FIG. 1;
FIG. 3 is a partial schematic view of the present invention in use;
in the figure: 1. a nozzle; 2. inflating and sealing the surrounding belt; 3. a first connecting seat; 4. moving the sleeve; 5. a third connecting seat; 6. a test chamber; 7. a second connecting seat; 8. a polytetrafluoroethylene ring; 9. an O-shaped sealing ring; 10. pressing a ring; 11. a first connecting screw; 12. and the second connecting screw rod.
Detailed Description
The present invention will be described in detail with reference to fig. 1 to 3, and the technical solutions in the embodiments of the present invention will be clearly and completely described.
A vibration isolation sealing device comprises a movable sleeve 4 and a support component,
one end of the movable sleeve 4 is fixedly arranged on the spray pipe 1 through a connecting bolt, while the other end is axially connected with the supporting component in a sliding way,
an inflatable sealing surrounding belt 2 is arranged between the contact surfaces of the movable sleeve 4 and the spray pipe 1,
the support assembly is fixedly mounted to the test chamber 6.
In this embodiment, the support assembly includes a third connecting socket 5 and a pressing ring 10,
the third connecting seat 5 is connected to the test chamber 6 through a connecting bolt and is inserted into the end part of the movable sleeve 4 to support the movable sleeve;
the pressing ring 10 is arranged on the periphery of the third connecting seat 5 and radially limits the movable sleeve 4 arranged on the third connecting seat 5;
in this embodiment, a teflon ring 8 is disposed between the third connecting seat 5 and the moving sleeve 4 and is sleeved on the third connecting seat 5.
In this embodiment, an O-ring 9 attached to the liner 4 is provided between the liner 4 and the pressure ring 10.
In this embodiment, the upper ends of the movable sleeves 4 are respectively provided with a first connecting screw 11 and a second connecting screw 12,
a first connecting seat 3 matched with a first connecting screw rod 11 is arranged on the spray pipe 1, wherein the first connecting screw rod 11 penetrates through the first connecting seat 3 and is connected through a nut,
be provided with the second connecting seat 7 that matches with second connecting screw 12 on experimental cabin 6, this second connecting seat 7 is seted up the axial and is used for installing second connecting screw 12 mounting groove to realize through the nut that second connecting screw 12 is connected with second connecting seat 7, this nut is in the state of screwing except that being in when changing inflatable seal shroud 2, all is in not hard up state when all the other.
When the test device is used specifically, one end of the movable sleeve is fixed on the spray pipe through the connecting bolt and moves axially along with the spray pipe, the other end of the movable sleeve is supported on the third connecting seat, the third connecting seat is fixed with the test chamber through the connecting bolt, a polytetrafluoroethylene ring is arranged between the third connecting seat and the movable sleeve to reduce the friction resistance of the movable sleeve, the polytetrafluoroethylene ring is fixed on the third connecting seat through the connecting bolt, an O-shaped sealing ring is arranged on the position, close to the polytetrafluoroethylene ring, of the movable sleeve, a pressing ring is arranged on the outer ring of the O-shaped sealing ring to ensure that the test chamber can be sealed with the outside when the movable sleeve moves, and the pressing ring and the third connecting seat are fixed with the test chamber through the connecting bolt respectively;
an inflatable sealing shroud is arranged between the spray pipe and the movable sleeve and used for sealing the movable side wall of the spray pipe and the movable sleeve; 3 first connecting screw rods and second connecting screw rods of each spiro union on the upper portion of two ends of the movable sleeve are respectively connected with the first connecting seat and the second connecting seat through nuts and are used when the inflatable sealing shroud ring is temporarily supported and replaced by the movable sleeve, the first connecting seat and the second connecting seat are respectively fixed with the spray pipe and the test chamber through connecting bolts, and the nuts connected with the second connecting screw rods and the second connecting seats are in a loose state in normal use.
The invention realizes the clearance compensation of axial displacement of 5mm in large-scale free jet test equipment, and has reliable sealing; meanwhile, the invention adopts a stronger movable sleeve supporting structure to avoid the problem of exciting vibration during air flow disturbance possibly caused by rigidity mutation, and meanwhile, the invention has smart structure and convenient installation and maintenance.
Claims (2)
1. A vibration isolation seal assembly, characterized by: comprises a movable sleeve (4) and a supporting component,
one end of the movable sleeve (4) is fixedly arranged on the spray pipe (1) through a connecting bolt, while the other end is axially connected with the supporting component in a sliding way,
an inflatable sealing surrounding belt (2) is arranged between the contact surface of the movable sleeve (4) and the spray pipe (1),
the supporting component is fixedly arranged on the test cabin (6);
the supporting component comprises a third connecting seat (5) and a pressing ring (10),
the third connecting seat (5) is connected to the test chamber (6) through a connecting bolt and is inserted into the end part of the movable sleeve (4) to support the movable sleeve;
the pressing ring (10) is arranged on the periphery of the third connecting seat (5) and radially limits the movable sleeve (4) arranged on the third connecting seat (5);
a polytetrafluoroethylene ring (8) sleeved on the third connecting seat (5) is arranged between the third connecting seat (5) and the movable sleeve (4);
an O-shaped sealing ring (9) arranged on the movable sleeve (4) is arranged between the movable sleeve (4) and the pressing ring (10).
2. The vibration isolation seal assembly according to claim 1, wherein: the upper end of the movable sleeve (4) is respectively provided with a first connecting screw rod (11) and a second connecting screw rod (12),
a first connecting seat (3) matched with a first connecting screw rod (11) is arranged on the spray pipe (1), wherein the first connecting screw rod (11) penetrates through the first connecting seat (3) and is connected through a nut,
be provided with second connecting seat (7) that matches with second connecting screw (12) on experimental cabin (6), axial being used for installing second connecting screw (12) mounting groove has been seted up in this second connecting seat (7) to realize through the nut that second connecting screw (12) are connected with second connecting seat (7), be in the state of screwing when changing inflatable seal shroud ring (2) with second connecting screw (12) complex nut, all be in not hard up state when all the other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111637672.XA CN114001215B (en) | 2021-12-30 | 2021-12-30 | Vibration isolation sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111637672.XA CN114001215B (en) | 2021-12-30 | 2021-12-30 | Vibration isolation sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114001215A CN114001215A (en) | 2022-02-01 |
| CN114001215B true CN114001215B (en) | 2022-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111637672.XA Active CN114001215B (en) | 2021-12-30 | 2021-12-30 | Vibration isolation sealing device |
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| CN (1) | CN114001215B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115235725B (en) * | 2022-09-23 | 2022-11-25 | 中国空气动力研究与发展中心高速空气动力研究所 | Vibration reduction overflow device for high-speed free jet wind tunnel test cabin airflow collector |
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| JP2008008487A (en) * | 2006-05-31 | 2008-01-17 | Asahi Organic Chem Ind Co Ltd | Tube connection construction |
| JP2009014011A (en) * | 2007-06-29 | 2009-01-22 | Asahi Organic Chem Ind Co Ltd | Expansion joint |
| CN205298561U (en) * | 2015-12-09 | 2016-06-08 | 中国空气动力研究与发展中心超高速空气动力研究所 | A aerify axial seal device for under vacuum environment |
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| CN114001215A (en) | 2022-02-01 |
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