CN208397474U - A kind of airflow line sealing structure - Google Patents
A kind of airflow line sealing structure Download PDFInfo
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- CN208397474U CN208397474U CN201820922558.9U CN201820922558U CN208397474U CN 208397474 U CN208397474 U CN 208397474U CN 201820922558 U CN201820922558 U CN 201820922558U CN 208397474 U CN208397474 U CN 208397474U
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- airflow line
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- sealing structure
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Abstract
The utility model is a kind of airflow line sealing structure, it is related to gas injection technical field, specifically include that airflow line has admission line and crystal entertainment ball pipeline, admission line seals not tight enough with crystal entertainment ball pipeline junction, high pressure gas flows through the problem of having leakage, during the test, it will cause the inaccuracy of data, clamping is fixed by bolt and axial gasket in the sealing cover of two semi-annular shapes of the utility model, form an annulus, sealing cover fixing sleeve is set on admission line by axial bolts and pressing plate again, sealing ring is set to the position of sealing cover and tube contacts, achieve the effect that sealing, reduce the leakage rate of gas, reduce error when test, and convenient installation and removal.
Description
Technical field
The utility model relates to arrive gas injection technical field, and in particular to a kind of sealing structure of airflow line.
Background technique
When carrying out the thrust measurement of nozzle test part, usually pipeline and testpieces are mounted on device for measuring force, it is whole to make
For a moving frame, it is connect by flexible component with the frame of determining of dynamometry rack, in order to exclude interference of the steam line to dynamometry rack,
Nozzle test device is tightly connected mode using the non-contact comb tooth of radial air inlet, is theoretically zero to the interference of dynamometry, uniquely
Problem is how the quantity of gas leakage of Accurate Determining comb tooth sealing, this is related to the flow measurement of testpieces.There are two types of before
Effective ways solve this problem:
1, solve the problems, such as that quantity of gas leakage measures at comb tooth using the method for standard sonic nozzle calibration comb tooth leakage rate:
Sonic nozzle inlet pressure is adjusted, keeps venturi critical, a series of pressure of measurement comb tooth inlet air flow, temperature and back pressure, leakage rate
=equipment flow-sonic nozzle flow can obtain leakage rate and pressure, temperature, the relationship of back pressure.During test, survey in real time
Comb tooth inlet pressure, temperature and back pressure are measured, leakage rate can be released by their relationship.
2, the comb tooth for removing pipeline changes the straight tube of No leakage amount into, is fitted the relationship of outflow and testpieces import stagnation pressure
Curve, and then remove the actual flow of corrected thrust test (with comb tooth) jet pipe.
When being tested using method 1, there are difference, pressures for the flow regime in the flow regime and test of leakage rate calibration
Not exclusively, there are errors in the field of force.
When being tested using method 2, test process needs to change pipeline, and workload is huge, influences test progress.
Utility model content
A kind of airflow line sealing structure provided by the utility model, with mitigate or solve it is existing in the prior art at least
One problem.
The airflow line sealing structure of the utility model, comprising:
Sealing cover, for the annular structure of two semicircular rings composition, coaxial sleeve is set on the outer wall of crystal entertainment ball and gap
Cooperation, axial one end end face and admission line are tightly connected, and the sealing cover aperture surface offers annular groove circumferentially, described
First through hole is offered in sealing cover axial direction；
Sealing ring is installed in the annular groove, is bonded with the outer wall of the crystal entertainment ball；
Pressing plate is in circular ring structure, offers the second axial through-hole, the pressing plate is sheathed on the outer wall of the crystal entertainment ball
Above and it is located at the sealing cover backwards to the side of the air inlet pipeline, the internal diameter of the pressing plate is equal to the crystal entertainment ball outer diameter；
Axial bolts are fixed on the admission line after second through-hole and the first through hole.
Preferably, two semicircular ring link positions in the sealing cover are provided with link block.
Preferably, the link block is bolted.
Preferably, axial gasket is added between two semicircular ring link blocks in the sealing cover.
Preferably, there are two the annular groove settings.
Preferably, the first through hole is provided with multiple and is uniformly distributed circumferentially with second through-hole.
Preferably, the sealing ring material is rubber.
The utility model has the beneficial effects that
The airflow line sealing structure of the utility model, structure is simple, and the structure of semi-annular shape is easily installed in disassembly, no
Test progress is influenced with frequent replacement test pipe, dual ring structure can effectively reduce the leakage of gas
Amount, reduces error of test data.
Detailed description of the invention
Fig. 1 is scheme of installation of the sealing structure of this airflow line on pipeline；
Fig. 2 is the enlarged diagram of sealing structure I in Fig. 1 of this airflow line；
Fig. 3 is the sealing structure radial section structure diagram of this airflow line；
Wherein, 1- bolt, 2- pressing plate, 3- axial bolts, 4- axial direction gasket, 5- sealing cover, 6- sealing ring, 7- air inlet pipe
Road, 8- crystal entertainment ball.
Specific embodiment
It is illustrated below with reference to specific embodiment of the Fig. 1 to Fig. 3 to the utility model, in retouching for the utility model
In stating, it is to be understood that term " center ", " longitudinal direction ", " transverse direction ", "front", "rear", "left", "right", "vertical", "horizontal",
The orientation or positional relationship of the instructions such as "top", "bottom" "inner", "outside" be based on the orientation or positional relationship shown in the drawings, such as
" clockwise ", " counterclockwise ", " upward ", " downward " etc., are merely for convenience of describing the present invention and simplifying the description, rather than
The device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot
It is interpreted as the limitation to scope of protection of the utility model.
Fig. 1 is a kind of sealed structure chart of airflow line of the utility model, and wherein gas enters sealed core from admission line 7
The pipeline of body 8, but be not to be tightly connected in the external right angle crook of crystal entertainment ball pipeline, still there is gap, it is existing
Gap can reduce the leakage of gas using the structure of comb tooth, but in test, the flow regime and test of leakage rate calibration
In flow regime there are difference, not exclusively, there are errors for pressure field；Pipeline can also be replaced, but test is many kinds of,
Replacement is frequently, time-consuming and laborious, to overcome the problems, such as present at least one, in conjunction with Fig. 1 to Fig. 3, one kind of the utility model
The sealing structure of airflow line, comprising:
Sealing cover 5 is the annular structure of two semicircular rings composition, between coaxial sleeve is set on the outer wall of crystal entertainment ball 8 simultaneously
Gap cooperation, two semicircular rings are combined into an annulus sealing cover 5, and link block is connected by bolt 1, two in sealing cover 5
Axial gasket 4 is added between semicircular ring link block.By adding the fastening of axial gasket 4 and bolt 1, junction ensure that
Air-tightness.
Axial one end end face of sealing cover 5 and admission line 7 are tightly connected, and 5 aperture surface of sealing cover offers circumferentially
Sealing ring 6 is installed in annular groove by annular groove, is bonded with the outer wall of crystal entertainment ball 8, furthermore, it is to be understood that annular groove is set
Two or more are equipped with, multiple sealing can preferably reduce the leakage flow of gas, preferentially use two in the utility model
A annular groove and sealing ring 6,6 material of sealing ring are rubber or other materials with sealing performance.
First through hole is offered in 5 axial direction of sealing cover, pressing plate 2 is in circular ring structure, offers the second axial through-hole,
Further, first through hole is provided with multiple and is uniformly distributed circumferentially with the second through-hole.
Pressing plate 2 is sheathed on the outer wall of crystal entertainment ball 8 and is located at sealing cover 5 backwards to the side of admission line 7, pressing plate 2
Internal diameter is equal to 8 outer diameter of crystal entertainment ball；
Axial bolts 3 are fixed on admission line 7 after the second through-hole and first through hole, it is to be understood that axial
Pressing plate 2 and sealing cover 5 are fixedly attached on admission line 7 by bolt 3.
In test, gas enters gas caused by crystal entertainment ball 8 by admission line 7 and leaks, and adds the utility model
Sealing structure, the leakage rate of gas reduces, and keeps the stabilization of leakage rate, simple structure, convenient installation and removal avoid
Because of replacement pipeline, caused workload is huge, influences the problems such as test progress.
Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to
In this, anyone skilled in the art within the technical scope disclosed by the utility model, the change that can be readily occurred in
Change or replace, should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should be with described
Subject to scope of protection of the claims.
Claims (7)
1. a kind of airflow line sealing structure characterized by comprising
Sealing cover (5) is the annular structure of two semicircular rings composition, between coaxial sleeve is set on the outer wall of crystal entertainment ball (8) simultaneously
Gap cooperation, axial one end end face and admission line (7) are tightly connected, and sealing cover (5) aperture surface offers ring circumferentially
Slot offers first through hole on the sealing cover (5) axis；
Sealing ring (6), is installed in the annular groove, is bonded with the outer wall of the crystal entertainment ball (8)；
Pressing plate (2) is in circular ring structure, offers the second axial through-hole, the pressing plate (2) is sheathed on the crystal entertainment ball (8)
Outer wall on and be located at the sealing cover (5) backwards to the side of the admission line (7), the internal diameter of the pressing plate (2) is equal to institute
State crystal entertainment ball (8) outer diameter；
Axial bolts (3) are fixed on the admission line (7) after second through-hole and the first through hole.
2. airflow line sealing structure according to claim 1, which is characterized in that two and half in the sealing cover (5)
Annulus link position is provided with link block.
3. airflow line sealing structure according to claim 2, which is characterized in that the link block is connected by bolt (1)
It connects.
4. airflow line sealing structure according to claim 2 or 3, which is characterized in that two in the sealing cover (5)
Axial gasket (4) are added between semicircular ring link block.
5. airflow line sealing structure according to claim 1, which is characterized in that there are two the annular groove settings.
6. airflow line sealing structure according to claim 1, which is characterized in that the first through hole is logical with described second
Hole is provided with multiple and is uniformly distributed circumferentially.
7. airflow line sealing structure according to claim 1, which is characterized in that sealing ring (6) material is rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820922558.9U CN208397474U (en) | 2018-06-14 | 2018-06-14 | A kind of airflow line sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820922558.9U CN208397474U (en) | 2018-06-14 | 2018-06-14 | A kind of airflow line sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208397474U true CN208397474U (en) | 2019-01-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820922558.9U Active CN208397474U (en) | 2018-06-14 | 2018-06-14 | A kind of airflow line sealing structure |
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| CN (1) | CN208397474U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113063598A (en) * | 2021-03-18 | 2021-07-02 | 中国航发沈阳发动机研究所 | Thrust measurement structure and measurement method for spray pipe |
-
2018
- 2018-06-14 CN CN201820922558.9U patent/CN208397474U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113063598A (en) * | 2021-03-18 | 2021-07-02 | 中国航发沈阳发动机研究所 | Thrust measurement structure and measurement method for spray pipe |
| CN113063598B (en) * | 2021-03-18 | 2022-10-28 | 中国航发沈阳发动机研究所 | Thrust measurement structure and measurement method for spray pipe |
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