CN215338761U

CN215338761U - Sealing performance detection device

Info

Publication number: CN215338761U
Application number: CN202121606731.2U
Authority: CN
Inventors: 胡应交; 李兰清; 王鹏
Original assignee: AECC Commercial Aircraft Engine Co Ltd
Current assignee: AECC Commercial Aircraft Engine Co Ltd
Priority date: 2021-07-15
Filing date: 2021-07-15
Publication date: 2021-12-28
Anticipated expiration: 2031-07-15

Abstract

The utility model discloses a sealing performance detection device, relates to the field of aero-engine fan performance tests, and aims to simply and conveniently detect the sealing performance of a W sealing ring. The sealing performance detection device comprises a first air chamber and a second air chamber. The first air chamber is provided with a first inner concave part and at least two mounting grooves, and the mounting grooves are positioned on the outer side of the first inner concave part. The second air chamber is provided with a second inner concave part; first air chamber and second air chamber fixed connection, and first interior concave part and the interior concave part intercommunication of second form the air chamber. Wherein each mounting groove opens toward the second air chamber, each mounting groove is configured to accommodate a W seal ring to be detected, and a compression direction of the W seal ring is along an axial direction of the first air chamber; and a detection cavity is formed among each W sealing ring, the first air chamber and the second air chamber. According to the technical scheme, the leakage amount of the W sealing ring is detected before the W sealing ring is installed on the tester.

Description

Sealing performance detection device

Technical Field

The utility model relates to the field of aero-engine fan performance tests, in particular to a sealing performance detection device.

Background

The aircraft engine fan performance tester uses a set of large metal W seal rings. A metal W seal ring is installed between the common transition section of the exhaust system and the exhaust plenum for sealing and absorbing thermal expansion. The set of metal W sealing rings comprises 3 metal sealing rings with different diameters, and is used for sealing the fan connotation and absorbing axial deformation. The leakage amount of each W sealing ring is qualified after being detected before delivery.

The inventor finds that the size of the domestic largest metal W sealing ring is smaller than that of the set of W sealing rings. Whether the final sealing performance of the W sealing ring can meet the requirements or not is judged, no matter the design party is, no relevant experience exists in the processing party, and risks exist. And the installation and the disassembly are complex, manual and high in time cost. In order to ensure the reliability of the sealing ring after installation, the actual working condition of the W sealing ring needs to be simulated before installation, and the leakage quantity of the W sealing ring is detected.

SUMMERY OF THE UTILITY MODEL

The utility model provides a sealing performance detection device, which is used for simply detecting the sealing performance of a W sealing ring.

The embodiment of the utility model provides a sealing performance detection device, which comprises:

the first air chamber is provided with a first inner concave part and at least two mounting grooves, and the mounting grooves are positioned on the outer side of the first inner concave part; and

a second air chamber having a second concave portion; the first air chamber and the second air chamber are fixedly connected, and the first inner concave part and the second inner concave part are communicated to form an air chamber;

wherein each of the mounting grooves opens toward the second air chamber, each of the mounting grooves being configured to accommodate a W seal ring to be detected, a compression direction of the W seal ring being along an axial direction of the first air chamber; and a detection cavity is formed among each W sealing ring, the first air chamber and the second air chamber.

In some embodiments, the sealing performance detecting device further includes:

and the gasket is arranged between the first air chamber and the second air chamber and covers each mounting groove so as to adjust the compression amount of the W sealing ring.

In some embodiments, the gasket includes a plurality of gaskets, each of the gaskets having a different thickness, at least one of the gaskets being disposed between the first and second air chambers.

In some embodiments, at least one of the first and second gas chambers is provided with a detection hole, the detection hole is in fluid communication with the detection cavity, so as to detect the leakage amount of the detection cavity through the detection hole; and/or at least one of the first air chamber and the second air chamber is provided with an air inlet hole, and the air inlet hole is communicated with the detection cavity in a fluid mode so as to convey air to the detection cavity.

In some embodiments, the sealing performance detecting device further includes:

a pressure sensing element in fluid communication with the sensing aperture to sense a gas pressure within the sensing chamber.

In some embodiments, the first plenum is provided with a first connection hole, the second plenum is provided with a second connection hole, and a connector passes through the first connection hole and the second connection hole to detachably connect the first plenum and the second plenum.

In some embodiments, a plurality of the first connection holes are provided along a circumferential direction of the first air chamber, and a plurality of the second connection holes are provided along a circumferential direction of the second air chamber; the first connecting holes and the second connecting holes correspond to each other one by one.

In some embodiments, one of the first air chamber and the second air chamber is provided with a positioning protrusion, and the other is provided with a positioning groove; the positioning bulge is matched with the positioning groove.

In some embodiments, the sealing performance detecting device further includes:

and the sealing element is arranged between the positioning bulge and the positioning groove.

In some embodiments, the positioning projection and the positioning groove are both configured in a ring shape.

The sealing performance detection device provided by the technical scheme is used for detecting the leakage amount of the W sealing ring before the W sealing ring is installed on the tester. The sealing performance detection device comprises a first air chamber and a second air chamber, wherein the edges of the first air chamber and the second air chamber are fixedly connected and can be detachably connected. The first inner concave part and the second inner concave part are communicated to form a gas chamber, and the gas chamber and the detection cavity are relatively independent, namely, no gas is communicated between the gas chamber and the detection cavity. The airtightness to be detected is the sealing performance of the W sealing ring, the inner edge and the outer edge of the detection cavity are provided with two W sealing rings, and two end faces are opposite faces of the first air chamber and the second air chamber. Whether the gas in the detection cavity is leaked or not is tested, and the test on the sealing performance of the W sealing ring is realized.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the utility model without limiting the utility model. In the drawings:

fig. 1 is a schematic structural diagram of a sealing performance detection apparatus according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a sealing performance testing apparatus forming a testing chamber according to an embodiment of the present invention;

fig. 3 is a partially enlarged schematic view of a sealing performance detection apparatus a according to an embodiment of the present invention;

fig. 4 is a partially enlarged schematic view of a sealing performance detecting apparatus B according to an embodiment of the present invention;

fig. 5 is a partial perspective view of a sealing performance detecting device C according to an embodiment of the present invention.

Detailed Description

The technical solution provided by the present invention is explained in more detail with reference to fig. 1 to 5.

The embodiment of the utility model provides a sealing performance detection device which is used for detecting whether the sealing performance of a W sealing ring 9 meets the use requirement. By sealing performance is meant the ability to prevent leakage of fluid. The W seal ring 9 is a metal seal ring which is annular and has a cross section resembling a W shape, and is therefore referred to as the W seal ring 9.

Referring to fig. 1 and 2, the sealing performance detecting apparatus includes a first air chamber 1 and a second air chamber 2. The first air chamber 1 has a first inner recess 11 and at least two mounting grooves 12, the mounting grooves 12 being located outside the first inner recess 11. The second air chamber 2 has a second inner concave portion 21; the first air chamber 1 and the second air chamber 2 are fixedly connected, and the first inner concave part 11 and the second inner concave part 21 are communicated to form an air chamber. Wherein each mounting groove 12 opens towards the second air chamber 2, each mounting groove 12 being configured to accommodate a W seal ring 9 to be detected, the compression direction of the W seal ring 9 being along the axial direction M of the first air chamber 1. A detection cavity 8 is formed among each W-seal ring 9, the first air chamber 1 and the second air chamber 2. The detection cavity 8 and the air chamber are not communicated and are independent.

The first air chamber 1 and the second air chamber 2 are both disc-shaped structures. The first concave portion 11 of the first air cell 1 is located in the middle area of the first air cell 1, and is open. The second inner recess 21 of the second air chamber 2 is also located in the middle area of the second air chamber 2 and is also open. The mounting groove 12 is used for mounting the W seal ring 9. The mounting groove 12 is also annular, and the mounting groove 12 surrounds the outside of the first inner recess 11. When the W seal ring 9 is positioned in the mounting groove 12, if the W shape of the W seal ring 9 is rotated by 90 ° with reference to the direction shown in fig. 1 and 2, the W seal ring 9 can be compressed and deformed up and down.

The edges of the first and

second air chambers

1, 2 are connected together. The first and second

inner recesses

11, 21 communicate to form a gas chamber which is relatively independent of the detection chamber 8, i.e. there is no gas communication between the two. The airtightness to be detected herein is the sealing performance of the W seal ring 9, and the inner and outer edges of the detection chamber 8 are two W seal rings 9, and the two end surfaces are the surfaces of the first air chamber 1 and the second air chamber 2 which are opposite to each other. The W sealing ring 9 forming the inner edge of the detection cavity 8 and the W sealing ring 9 forming the outer edge of the detection cavity 8 are different in size, and three W sealing rings 9 with different inner and outer diameter sizes are used on the existing aircraft engine fan. Two W seal rings 9 are required to form each detection chamber 8, in other words, forming one detection chamber 8 can simultaneously detect the sealing performance of two W seal rings 9. When the sealing performance of the detection chamber 8 satisfies the requirement, it means that the performance of both the W seal rings 9 forming the detection chamber 8 satisfies the requirement. If the sealing performance of the detection chamber 8 does not satisfy the requirement, the performance of at least one of the two W seal rings 9 forming the detection chamber 8 does not satisfy the requirement.

With continued reference to fig. 1 and 2, in some embodiments, the sealing performance detecting apparatus further includes a gasket 3, the gasket 3 is disposed between the first air chamber 1 and the second air chamber 2, and the gasket 3 covers each of the mounting grooves 12 to adjust the compression amount of the W seal ring 9. Because the connection relation between the first air chamber 1 and the second air chamber 2 is determined, the gaskets 3 with different thicknesses are clamped between the first air chamber 1 and the second air chamber 2, the compression amount of each W sealing ring 9 in the mounting groove 12 can be adjusted, and the sealing performance of the W sealing ring 9 under different thermal expansion is further detected.

In some embodiments, the gasket 3 includes a plurality of gaskets 3, each of which has a different thickness, and at least one of the gaskets 3 is disposed between the first air chamber 1 and the second air chamber 2. Taking four gaskets 3 with different thicknesses as an example, one of the gaskets 3 or a combination of a plurality of gaskets 3 is adopted for each installation, so that the sealing performance of the W sealing ring 9 under a plurality of compression amounts can be measured.

With continued reference to fig. 1, in some embodiments, at least one of the first air chamber 1 and the second air chamber 2 is provided with a detection hole 4, and the detection hole 4 is arranged between two mounting grooves 12 to detect the leakage amount of the detection cavity 8. For each detection chamber 8, one detection hole 4 is provided. As described above, the conventional aircraft engine fan uses three W seal rings 9 having different inner and outer diameter sizes, and each of the three W seal rings 9 corresponds to one mounting groove 12. Between two adjacent W seal rings 9, one detection chamber 8 is formed. The two detection chambers 8 are independent of each other and there is no fluid interaction. In this case, one detection hole 4 is provided for each detection chamber 8 individually.

Referring to fig. 1 and 5, in some embodiments, the sealing performance detection apparatus further includes a pressure detection element 6, and the pressure detection element 6 is in fluid communication with the detection hole 4 to detect the gas pressure in the detection chamber 8. The pressure detecting element 6 is, for example, a pressure gauge.

In other embodiments, at least one of the first and

second air chambers

1 and 2 is provided with an air inlet hole 5, the air inlet hole 5 being in fluid communication with the detection chamber 8 for delivering air to the detection chamber 8. The air intake hole 5 and the detection hole 4 are two different holes. The air inlet 5 is used for conveying gas to the detection cavity 8, and the air inlet 5 is closed after the gas conveying amount meets the requirement. Then, the change in the gas pressure in the detection chamber 8 is observed by the pressure detection element 6 attached to the detection hole 4. If the gas pressure decreases, it indicates that there is a leak in the W seal ring 9. If there are a plurality of detection chambers 8, each detection chamber 8 is provided with an air inlet hole 5 separately.

With continued reference to fig. 1 and 3, in some embodiments, the first air cell 1 is provided with a first connection hole 13, the second air cell 2 is provided with a second connection hole 22, and the connection member 10 passes through the first connection hole 13 and the second connection hole 22 to detachably connect the first air cell 1 and the second air cell 2.

The axes of the first connecting hole 13 and the second connecting hole 22 are aligned, and the first air chamber 1 and the second air chamber 2 are detachably connected through the connecting piece 10. The connecting element 10 is for example a pin. After the pin shaft is installed in place, the pin shaft is locked through nuts and the like.

In some embodiments, a plurality of first connection holes 13 are provided along a circumferential direction of the first air chamber 1, and a plurality of second connection holes 22 are provided along a circumferential direction of the second air chamber 2; the first connection holes 13 and the second connection holes 22 correspond one to one.

Since the detected W sealing ring 9 is suitable for the aero-engine, in order to achieve more consistent detection environment and actual environment, the size and weight of the universal transition section of the first air chamber 1 and the W sealing ring 9 after being actually installed on the fan blade of the aero-engine are basically consistent. The size and weight of the exhaust plenum after the second plenum 2 and W-ring seal 9 are actually mounted to the aircraft engine fan blades is substantially the same. The machining precision of the sealing surface of the sealing performance detection device needs to be the same as that of the actual exhaust transition section sealing surface and the exhaust gas collection chamber sealing surface, the detection device can simulate the actual working condition of the W sealing ring 9 in operation in a tester, and the structural strength also meets the requirement. The machining precision of each sealing surface is consistent with the actual situation. The mass and size of the first and

second air chambers

1 and 2 are relatively large. The circumference of first air chamber 1 is provided with the first connecting hole 13 of round, the circumference of second air chamber 2 is provided with round second connecting hole 22 for first air chamber 1 and second air chamber 2's connection is firm reliable more.

Referring to fig. 1 and 4, in some embodiments, one of the first and

second air chambers

1 and 2 is provided with a positioning protrusion 14, and the other is provided with a positioning groove 23. The positioning projection 14 is fitted with the positioning groove 23. The positioning protrusions 14 and the positioning grooves 23 enable the first air chamber 1 and the second air chamber 2 to be positioned more easily in the process of hoisting installation.

In some embodiments, both the positioning projection 14 and the positioning slot 23 are configured in a ring shape. Thus, the positioning area is larger, and the alignment is easier.

Referring to fig. 1 and 3, in some embodiments, the sealing performance testing apparatus further includes a sealing member 7, and the sealing member 7 is disposed between the positioning protrusion 14 and the positioning groove 23. The sealant is, for example, an O-ring.

The following describes the installation process of the sealing performance detection apparatus.

Firstly, horizontally placing a first air chamber 1 on the ground; secondly, installing each W-shaped sealing ring 9 in an installation groove 12 of the first air chamber 1; thirdly, placing the gasket 3 on the surface of the first air chamber 1; thirdly, vertically hoisting the second air chamber 2 provided with the sealing element 7 to the upper part of the first air chamber 1, rotating the second air chamber 2 by 90 degrees to enable the second air chamber 2 to become horizontal and slowly approach the first air chamber 1, aligning the positioning bulges 14 and the positioning grooves 23 of the first air chamber 1 and the second air chamber 2, and slowly placing the first air chamber 1 on the second air chamber 2; fifthly, connecting the first air chamber 1 and the second air chamber 2 together by using a positioning pin, and locking the first air chamber 1 and the second air chamber 2 by using a bolt and a nut; sixthly, installing the pressure detection element 6 in the detection hole 4, wherein the detection hole 4 is communicated with the detection cavity 8; seventhly, one end of the air inlet pipe is connected with the air inlet hole 5, and the other end of the air inlet pipe is connected with the mass flow meter. After all the tools are installed, the tool for detecting the leakage amount is hoisted to be in a vertical state from a horizontal state.

Before testing, an air inlet pipe is connected to the air inlet 5, and one end, far away from the air inlet 5, of the air inlet pipe is connected with a mass flow meter. Gas with certain pressure is injected into the detection cavity 8 through the mass flow meter, and a stable pressure environment is established in connotation at the moment when the pointer of the pressure gauge is stable through observation of the pressure detection element 6. If the pressure leakage exists in the connotation area, the gas inlet end needs to be supplemented with gas to enter the connotation, and the mass flow of the supplementing gas can be read out through the mass flow meter. The mass flow of make-up gas is now equal to the leakage of the W-seal 9. Mass flow rate is the mass of fluid per unit time that passes through the effective cross section of a closed pipe or open channel.

In the description of the present invention, it is to be understood that the terms "central", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the scope of the present invention.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: it is to be understood that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, but such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sealing performance detecting apparatus, characterized by comprising:

a first air chamber (1) having a first inner recess (11) and at least two mounting grooves (12), the mounting grooves (12) being located outside the first inner recess (11); and

a second air chamber (2) having a second inner recess (21); the first air chamber (1) is fixedly connected with the second air chamber (2), and the first inner concave part (11) is communicated with the second inner concave part (21) to form an air chamber;

wherein each mounting groove (12) opens towards the second air chamber (2), each mounting groove (12) being configured to accommodate a W-ring seal (9) to be tested, the compression direction of the W-ring seal (9) being along the axial direction of the first air chamber (1); and a detection cavity (8) is formed among each W sealing ring (9), the first air chamber (1) and the second air chamber (2), and the detection cavity (8) and the air chambers are mutually independent.

2. The sealing performance detecting apparatus according to claim 1, further comprising:

and the gasket (3) is arranged between the first air chamber (1) and the second air chamber (2), and the gasket (3) covers each mounting groove (12) so as to adjust the compression amount of the W sealing ring (9).

3. The sealing performance detecting apparatus according to claim 2, wherein the gasket (3) includes a plurality of gaskets (3), each of the gaskets (3) having a different thickness, at least one of the gaskets (3) being disposed between the first air chamber (1) and the second air chamber (2).

4. The sealing performance detection apparatus according to claim 1, wherein at least one of the first air chamber (1) and the second air chamber (2) is provided with a detection hole (4), and the detection hole (4) is in fluid communication with the detection chamber (8) to detect a leakage amount of the detection chamber (8) through the detection hole (4); and/or at least one of the first air chamber (1) and the second air chamber (2) is provided with an air inlet hole (5), and the air inlet hole (5) is communicated with the detection cavity (8) in a fluid mode so as to convey air to the detection cavity (8).

5. The sealing performance detecting apparatus according to claim 4, further comprising:

a pressure sensing element (6) in fluid communication with the sensing aperture (4) to sense the gas pressure within the sensing chamber (8).

6. The sealing performance detecting apparatus according to claim 1, wherein the first air chamber (1) is provided with a first connecting hole (13), the second air chamber (2) is provided with a second connecting hole (22), and a connecting member (10) passes through the first connecting hole (13) and the second connecting hole (22) to detachably connect the first air chamber (1) and the second air chamber (2).

7. The sealing performance detection apparatus according to claim 6, wherein a plurality of the first connection holes (13) are provided along a circumferential direction of the first air chamber (1), and a plurality of the second connection holes (22) are provided along a circumferential direction of the second air chamber (2); the first connecting holes (13) and the second connecting holes (22) are in one-to-one correspondence.

8. The sealing performance detecting apparatus according to claim 1, wherein one of the first air chamber (1) and the second air chamber (2) is provided with a positioning projection (14), and the other is provided with a positioning groove (23); the positioning protrusion (14) is matched with the positioning groove (23).

9. The sealing performance detecting apparatus according to claim 8, further comprising:

a sealing member (7) disposed between the positioning projection (14) and the positioning groove (23).

10. The sealing performance detecting apparatus according to claim 8, wherein the positioning projection (14) and the positioning groove (23) are both configured in a ring shape.