阅读说明：本技术 一种进气机匣结构 (Air inlet casing structure ) 是由 王小颖 郑海亮 王雅谋 于 2020-05-25 设计创作，主要内容包括：本申请属于发动机进气机匣设计技术领域,具体涉及一种进气机匣结构,包括：进气机匣,呈环形；多个支板,在进气机匣内沿周向分布；每个支板的一端为外端,另一端为内端；各个支板的外端与进气机匣连接,内端相互拼接形成支板环；支撑环,与支板环同轴设置,与支板环的前侧端面连接。(The application belongs to the technical field of engine air inlet casing design, concretely relates to air inlet casing structure, include: the air inlet casing is annular; the support plates are distributed in the air inlet casing along the circumferential direction; one end of each support plate is an outer end, and the other end of each support plate is an inner end; the outer ends of the support plates are connected with the air inlet casing, and the inner ends of the support plates are mutually spliced to form a support plate ring; and the support ring is coaxially arranged with the support plate ring and is connected with the front end face of the support plate ring.)

1. An air intake case structure, comprising:

the air inlet casing (1) is annular;

a plurality of support plates (2) distributed in the circumferential direction inside the air inlet casing (1); one end of each support plate (2) is an outer end, and the other end of each support plate is an inner end; the outer end of each support plate (2) is connected with the air inlet casing (1), and the inner ends of the support plates are spliced with each other to form a support plate ring;

and the support ring (3) is coaxially arranged with the support plate ring and is connected with the front end face of the support plate ring.

2. The air intake casing structure according to claim 1,

the support ring (3) is connected with the inner end of each support plate (2) through a screw.

3. The air intake casing structure according to claim 1,

the support ring (3) has an annular support edge which projects into the inside of the carrier ring.

4. The air intake casing structure according to claim 1,

the air inlet casing (1) is provided with a plurality of limiting grooves;

the outer end of each support plate (2) is correspondingly inserted into one limiting groove.

5. The air intake casing structure according to claim 4,

each support plate (2) is connected with the air inlet casing (1) in a welding mode.

6. The air intake casing structure according to claim 4,

a support plate anti-icing cavity is arranged in each support plate (2), a support plate air-guiding inlet communicated with an anti-icing air source is formed in the end face of the outer end of each support plate, a support plate air-collecting cavity communicated with the support plate anti-icing cavity is formed in the inner end of each support plate, and a support plate air-guiding outlet is formed in the outer wall of the inner end of each support plate;

the support ring (3) is provided with a plurality of support ring air vents; and each support ring air vent is correspondingly communicated with one support plate bleed air outlet.

7. The air intake casing structure according to claim 6,

further comprising:

and each support plate (4) is arranged in the corresponding anti-icing cavity of one support plate.

8. The engine intake case structure according to claim 7,

one end of each supporting plate (4) is connected with the inner wall of the outer end of the corresponding supporting plate (2), and the other end of each supporting plate extends towards the inner end of the corresponding supporting plate (2) and inclines towards the front side.

9. The air intake casing structure according to claim 6,

further comprising:

the anti-icing ring (5) is sleeved on the air inlet casing (1), a casing anti-icing cavity is formed between the anti-icing ring and the air inlet casing (1), and a casing air-leading inlet communicated with an anti-icing air source is formed in the anti-icing cavity; and the anti-icing cavity of the casing is communicated with the bleed air inlets of the support plates.

10. The air intake casing structure according to claim 9,

the anti-ice ring (5) is provided with a plurality of limiting ports;

a supporting bulge (6) is arranged on the end surface of the outer end of each support plate (2); each support protrusion (6) extends out of the corresponding limit opening and is provided with a support hole.

Technical Field

The application belongs to the technical field of engine air inlet casing design, and particularly relates to an air inlet casing structure.

Background

The air inlet casing structure of the aircraft engine is one of main bearing frames of the engine and comprises an air inlet casing; an inner ring arranged in the air inlet casing; and a plurality of support plates distributed along the circumferential direction between the air inlet casing and the inner ring, wherein one end of each support plate is connected with the air inlet casing, and the other end of each support plate is connected with the inner ring.

At present, in the engine machine casket structure of admitting air, each extension board one end and the machine casket welded connection that admits air, each boss welded connection on the other end and the inner ring, because the size, reasons such as assembly, this structure is whole to have great residual stress, and in the engine working process each extension board and the machine casket of admitting air, the deformation of inner ring is inconsistent, each extension board and the machine casket of admitting air, the stress at inner ring connection position is aggravated, make each extension board and the machine casket of admitting air, the crack easily sprouts at inner ring connection position, in addition, because the machine casket of admitting air, the restriction of inner ring inter-annular structure space, it is difficult to weld each extension board and inner ring connection position, and be difficult to detect and weld the permeability, the possibility that each extension board and inner ring connection position sprout the crack in the engine working process has.

The present application has been made in view of the above-mentioned technical drawbacks.

It should be noted that the above background disclosure is only for the purpose of assisting understanding of the inventive concept and technical solutions of the present invention, and does not necessarily belong to the prior art of the present patent application, and the above background disclosure should not be used for evaluating the novelty and inventive step of the present application without explicit evidence to suggest that the above content is already disclosed at the filing date of the present patent application.

Disclosure of Invention

It is an object of the present application to provide an air intake casing structure that overcomes or mitigates at least one of the technical disadvantages of the known prior art.

The technical scheme of the application is as follows:

an air intake casing structure comprising:

the air inlet casing is annular;

the support plates are distributed in the air inlet casing along the circumferential direction; one end of each support plate is an outer end, and the other end of each support plate is an inner end; the outer ends of the support plates are connected with the air inlet casing, and the inner ends of the support plates are mutually spliced to form a support plate ring;

and the support ring is coaxially arranged with the support plate ring and is connected with the front end face of the support plate ring.

According to at least one embodiment of the present application, the air inlet casing structure is configured such that the support ring is connected to the inner end of each of the support plates by a screw.

According to at least one embodiment of the present application, in the above-mentioned air inlet casing structure, a plurality of limiting grooves are formed on the air inlet casing;

the outer end of each support plate is correspondingly inserted into a limit groove.

According to at least one embodiment of the present application, in the above-described structure of the intake casing, each of the support plates is welded to the intake casing.

According to at least one embodiment of the application, in the structure of the air inlet casing, each support plate is internally provided with a support plate anti-icing cavity, the end surface of the outer end of each support plate is provided with a support plate air guide inlet communicated with an anti-icing air source, the inner end of each support plate is provided with a support plate air collection cavity communicated with the support plate anti-icing cavity, and the outer wall of the inner end of each support plate is provided with a support plate air guide outlet;

the support ring is provided with a plurality of support ring air vents; and each support ring air vent is correspondingly communicated with one support plate bleed air outlet.

According to at least one embodiment of the present application, the above-mentioned air intake casing structure further includes:

and each supporting plate is correspondingly arranged in the anti-icing cavity of one supporting plate.

According to at least one embodiment of the present application, in the above-described air inlet casing structure, one end of each support plate is connected to the inner wall of the outer end of the corresponding support plate, and the other end extends toward the inner end of the corresponding support plate and is inclined toward the front side.

According to at least one embodiment of the present application, the above-mentioned air intake casing structure further includes:

the anti-icing ring is sleeved on the air inlet casing, a casing anti-icing cavity is formed between the anti-icing ring and the air inlet casing, and a casing bleed air inlet communicated with an anti-icing air source is formed in the anti-icing cavity; the anti-icing chamber of the casing is communicated with the bleed air inlets of the support plates.

According to at least one embodiment of the present application, in the above-mentioned air inlet casing structure, the anti-ice ring has a plurality of limiting openings;

the end surface of the outer end of each support plate is provided with a support protrusion; each support protrusion extends out of the corresponding limit opening and is provided with a support hole.

According to at least one embodiment of the present application, in the above-mentioned air inlet casing structure, the support protrusion of the partial supporting plate has an outer-end oil return port, and the inner-end surface has an inner-end oil return port, and the partial supporting plate is an oil return supporting plate; and an outer end oil return port and an inner end oil return port on each oil return support plate are communicated with the anti-icing cavity of the support plate so as to allow an oil return pipeline to pass through.

According to at least one embodiment of the present application, the above-described inlet case structure wherein the support ring has an annular support rim, the annular support rim extending into an inner side of the support plate ring.

The method has the following advantages:

the structure of the air inlet casing is provided, the inner ends of the support plates are mutually spliced to form the support plate rings, and the support rings are supported and fixed on the front end face, so that the inner ends of the support plates are firmly combined to form a stable support plate ring structure, and the structure form that the inner ring is connected with the support plates in the existing air inlet casing structure is replaced, thereby greatly facilitating the assembly of the air inlet casing structure, reducing the residual stress generated by dimensional errors, ensuring that the air inlet casing structure has better stability as a whole, and bearing larger stress and being not easy to damage.

Drawings

FIG. 1 is a schematic view of an intake casing structure provided in an embodiment of the present application;

FIG. 2 is a partial schematic view of an air inlet casing structure provided in an embodiment of the present application;

wherein:

1-an air inlet casing; 2-a support plate; 3-a support ring; 4-a support plate; 5-anti-icing ring; 6-support the projection.

Detailed Description

In order to make the technical solutions and advantages of the present application clearer, the technical solutions of the present application will be further clearly and completely described in the following detailed description with reference to the accompanying drawings, and it should be understood that the specific embodiments described herein are only some of the embodiments of the present application, and are only used for explaining the present application, but not limiting the present application. It should be noted that, for convenience of description, only the parts related to the present application are shown in the drawings, other related parts may refer to general designs, and the embodiments and technical features in the embodiments in the present application may be combined with each other to obtain a new embodiment without conflict.

In addition, unless otherwise defined, technical or scientific terms used in the description of the present application shall have the ordinary meaning as understood by one of ordinary skill in the art to which the present application belongs. The terms "upper", "lower", "left", "right", "center", "vertical", "horizontal", "inner", "outer", and the like used in the description of the present application, which indicate orientations, are used only to indicate relative directions or positional relationships, and do not imply that the devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and when the absolute position of the object to be described is changed, the relative positional relationships may be changed accordingly, and thus, should not be construed as limiting the present application. The use of "first," "second," "third," and the like in the description of the present application is for descriptive purposes only to distinguish between different components and is not to be construed as indicating or implying relative importance. The use of the terms "a," "an," or "the" and similar referents in the context of describing the application is not to be construed as an absolute limitation on the number, but rather as the presence of at least one. The use of the terms "comprising" or "including" and the like in the description of the present application is intended to indicate that the element or item preceding the term covers the element or item listed after the term and its equivalents, without excluding other elements or items.

Further, it is noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," and the like are used in the description of the invention in a generic sense, e.g., connected as either a fixed connection or a removable connection or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, or they may be connected through the inside of two elements, and those skilled in the art can understand their specific meaning in this application according to the specific situation.

The present application is described in further detail below with reference to fig. 1-2.

An air intake casing structure comprising:

the air inlet casing 1 is annular;

a plurality of support plates 2 distributed along the circumferential direction in the air inlet casing 1; one end of each support plate 2 is an outer end, and the other end is an inner end; the outer ends of the support plates 2 are connected with the air inlet casing 1, the inner ends of the support plates are mutually spliced to form a support plate ring, and a certain gap can be formed between the inner ends of the support plates forming the support plate ring;

and the support ring 3 is coaxially arranged with the support plate ring and is connected with the front end face of the support plate ring.

For the structure of the inlet casing disclosed in the above embodiment, it can be understood by those skilled in the art that the inner ends of the support plates 2 are spliced to form a support plate ring, and the support ring 3 is used to support and fix the front end face of the support plate 2, so that the inner ends of the support plates 2 are firmly combined to form a stable support plate ring structure, thereby replacing the structure form of connecting the inner ring and the support plate in the existing inlet casing structure, greatly facilitating the assembly of the inlet casing structure, and reducing the residual stress generated by the dimensional error, so that the inlet casing structure has better stability as a whole, and can bear larger stress and is not easily damaged.

For the structure of the air inlet casing disclosed in the above embodiment, it can be further understood by those skilled in the art that the inner ends of the support plates 2 may be in a fan-shaped structure, and are sequentially butted end to form a support plate ring structure, but for convenience of splicing and assembling, the inner ends of some of the support plates 2 may be designed into other structural forms, for example, a surface where the inner end of one support plate 2 is spliced with the inner ends of two adjacent support plates may be designed to be symmetrical with respect to a symmetry plane of the air inlet casing 1.

In some alternative embodiments, the support ring 3 is connected to the inner end of each support plate 2 by screws, so as to reduce the welding position of the whole intake casing structure, thereby reducing the possibility of cracks of the welded casing structure during the operation of the engine.

In some optional embodiments, in the above-mentioned structure of the intake casing, the intake casing 1 has a plurality of limiting grooves;

the outer end of each support plate 2 is correspondingly inserted into a limit groove.

In some alternative embodiments, each of the support plates 2 is welded to the intake casing 1.

In some alternative embodiments, each support plate 2 has a support plate anti-icing cavity therein, the end surface of the outer end of the support plate 2 has a support plate bleed air inlet for communicating with an anti-icing air source, the inner end of the support plate 2 has a support plate air collection cavity communicating with the support plate anti-icing cavity, and the outer wall of the inner end of the support plate 2 has a support plate bleed air outlet;

the support ring 3 is provided with a plurality of support ring air vents; and each support ring air vent is correspondingly communicated with one support plate bleed air outlet.

For the structure of the air inlet casing disclosed in the above embodiment, it can be further understood by those skilled in the art that the anti-icing air can be introduced from the support plate air-guiding inlet to the support plate anti-icing chamber to heat the support plate 2, so as to achieve anti-icing of the support plate 2, and then flows into the support plate air-collecting chamber and is discharged through the support plate air-guiding outlet and the support ring air vent.

In some optional embodiments, the above intake casing structure further includes:

and each support plate 4 is correspondingly arranged in an anti-icing cavity of one support plate so as to support the corresponding support plate 2 and enhance the integral rigidity of the support plate 2.

In some alternative embodiments, in the above-mentioned structure of the inlet casing, one end of each supporting plate 4 is connected to the inner wall of the outer end of the corresponding supporting plate 2, and the other end extends towards the inner end of the corresponding supporting plate 2 and inclines towards the front side to guide the anti-icing air to the front end of the supporting plate 2, so that the front end of the supporting plate 2 has a better anti-icing effect.

In some optional embodiments, the above intake casing structure further includes:

the anti-icing ring 5 is sleeved on the air inlet casing 1, a casing anti-icing cavity is formed between the anti-icing ring and the air inlet casing 1, and a casing bleed air inlet for communicating with an anti-icing air source is formed in the anti-icing cavity; the anti-icing chamber of the casing is communicated with the bleed air inlets of the support plates.

With respect to the inlet case structure disclosed in the above embodiments, it will be appreciated by those skilled in the art that anti-icing air may be introduced into the case anti-icing cavity from the case bleed air inlet and thereafter flow into the strut anti-icing cavity through the strut bleed air inlet.

In some alternative embodiments, in the above-mentioned air inlet casing structure, the anti-ice ring 5 has a plurality of limiting ports;

the end surface of the outer end of each support plate 2 is provided with a support protrusion 6; each support protrusion 6 extends from the corresponding limit opening and is provided with a support hole for supporting a rotating shaft of an adjustable blade in the engine.

In some alternative embodiments, in the above-mentioned structure of the air inlet casing, the supporting protrusion 6 of the partial support plate 2 has an outer end oil return port, and the inner end surface has an inner end oil return port, and the partial support plate is an oil return support plate; and an outer end oil return port and an inner end oil return port on each oil return support plate are communicated with the anti-icing cavity of the support plate so as to allow an oil return pipeline to pass through.

In some alternative embodiments, the inlet casing structure described above, the support ring 3 has an annular support rim that extends into the inner side of the strut ring to support the inner end of each strut 2.

The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

Having thus described the present application in connection with the preferred embodiments illustrated in the accompanying drawings, it will be understood by those skilled in the art that the scope of the present application is not limited to those specific embodiments, and that equivalent modifications or substitutions of related technical features may be made by those skilled in the art without departing from the principle of the present application, and those modifications or substitutions will fall within the scope of the present application.