Engine fan rotor component

Abstract

The present application belongs to the technical field of design of aircraft engine fan rotor components, and specifically relates to an engine fan rotor component, including: a plurality of drums, each drum having a plurality of oil-slinging holes distributed along the circumferential direction; a multi-stage rotor disk, wherein two adjacent stages of rotor disks are connected via a drum; and a multi-stage rotor blade, wherein rotor blades of each stage before the last stage of rotor blades are connected to the rotor disk of the corresponding stage via a tenon-and-mortise structure, and the last stage of rotor blades are integrally formed on the last stage of rotor disk.

Description

Technical Field

[0001] The present application belongs to the technical field of design of aircraft engine fan rotor components, and specifically relates to an engine fan rotor component. Background Art

[0002] At present, there are mainly two structural forms of engine fan rotor components:

[0003] 1) The fan rotor blades at each level are connected to the rotor disc by a tenon-and-disc structure. This structure requires a large number of connectors to connect the fan rotor blades at each level to the rotor disc, which increases the overall mass of the engine fan rotor components, which is inconsistent with the requirements for engine weight reduction. In addition, the structure is complex and difficult to process and assemble.

[0004] 2) An integral blade disc structure is used between the fan rotor blades and rotor discs at each level. The fan rotor blades and rotor discs of this structure have a long production and processing cycle and are expensive. In addition, if damaged, the fan rotor blades and rotor discs need to be replaced as a whole, which makes maintenance difficult.

[0005] This application is proposed in view of the above-mentioned technical defects.

[0006] It should be noted that the disclosure of the above background technology content is only used to assist in understanding the inventive concept and technical solution of the present invention, and it does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above content has been disclosed on the filing date of this application, the above background technology should not be used to evaluate the novelty and creativity of the present application. Summary of the invention

[0007] The purpose of the present application is to provide an engine fan rotor component to overcome or alleviate at least one of the known technical deficiencies.

[0008] The technical solution of this application is:

[0009] An engine fan rotor component, comprising:

[0010] A plurality of drums, each drum having a plurality of oil-slinging holes distributed along the circumferential direction;

[0011] Multi-stage rotor discs, where two adjacent stages of rotor discs are connected by a drum;

[0012] The multi-stage rotor blades, the rotor blades of each stage before the last stage rotor blades are connected to the rotor disk of the corresponding stage through a disk-tenon structure, and the last stage rotor blades are integrally formed on the last stage rotor disk.

[0013] According to at least one embodiment of the present application, in the above-mentioned engine fan rotor component, the front end of each drum is connected to the trailing edge of the corresponding preceding stage rotor disk by bolts;

[0014] The rear end of each drum is integrally formed on the leading edge of the corresponding subsequent rotor disc.

[0015] According to at least one embodiment of the present application, in the above-mentioned engine fan rotor component, the outer edge of each stage of the rotor disc before the last stage of the rotor disc has a plurality of dovetail grooves extending in the axial direction;

[0016] The roots of the rotor blades of each stage before the last stage of rotor blades are provided with dovetail tenons; the dovetail tenons of each stage are inserted into the dovetail tenon grooves of the corresponding stage.

[0017] According to at least one embodiment of the present application, in the above-mentioned engine fan rotor component, one end of each stage of the dovetail groove extends to the leading edge of the corresponding stage rotor wheel to form a gap.

[0018] According to at least one embodiment of the present application, in the above-mentioned engine fan rotor component, the leading edge of each stage of the rotor disk before the last stage of the rotor disk has a plurality of leading edge protrusions; the inner side of each leading edge protrusion has a slot;

[0019] The engine fan rotor component also includes:

[0020] A plurality of retaining rings are each correspondingly clamped in a first-level clamping slot to cover a corresponding-level gap.

[0021] According to at least one embodiment of the present application, the above-mentioned engine fan rotor component further includes:

[0022] A plurality of first-stage counterweight nails are screwed circumferentially onto the leading edge of the first-stage rotor disc;

[0023] A plurality of first-stage locking plates are provided, and each first-stage locking plate is correspondingly padded between a first-stage counterweight nail and a leading edge of a first-stage rotor wheel disc.

[0024] According to at least one embodiment of the present application, in the above-mentioned engine fan rotor component, the trailing edge of the last stage rotor disk has a trailing edge annular protrusion; the inner side of the trailing edge annular protrusion has an annular counterweight groove;

[0025] The engine fan rotor component also includes:

[0026] Multiple last-stage connecting bolts;

[0027] A plurality of last-stage counterweight blocks are circumferentially distributed in the annular counterweight groove; each last-stage counterweight block is screwed to the annular protruding portion of the trailing edge via a last-stage connecting bolt;

[0028] A plurality of last-stage locking plates are provided, and each last-stage locking plate is correspondingly padded between a last-stage connecting bolt and the rear edge of the rear edge annular protruding portion.

[0029] According to at least one embodiment of the present application, in the above-mentioned engine fan rotor component, there are two drums;

[0030] The rotor discs and rotor blades have three stages. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic diagram of an engine fan rotor component provided in an embodiment of the present application;

[0032] in:

[0033] 1-drum; 2-rotor disc; 3-rotor blade; 4-retaining ring; 5-first-stage counterweight nail; 6-first-stage locking plate; 7-last-stage connecting bolt; 8-last-stage counterweight block; 9-last-stage locking plate.

[0034] In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; in addition, the drawings are used for illustrative purposes, and the terms describing the positional relationship are limited to illustrative purposes and cannot be understood as limitations on this patent. DETAILED DESCRIPTION

[0035] In order to make the technical solution and advantages of the present application clearer, the technical solution of the present application will be further described in detail in detail and in detail in conjunction with the accompanying drawings. It can be understood that the specific embodiments described here are only partial embodiments of the present application, which are only used to explain the present application, not to limit the present application. It should be noted that, for the convenience of description, only the parts related to the present application are shown in the accompanying drawings, and other related parts can refer to the general design. In the absence of conflict, the embodiments in the present application and the technical features in the embodiments can be combined with each other to obtain new embodiments.

[0036] In addition, unless otherwise defined, the technical terms or scientific terms used in the description of this application shall be the common meanings understood by the general technicians in the field to which this application belongs. The words "upper", "lower", "left", "right", "center", "vertical", "horizontal", "inside", "outside" and other words indicating orientation used in the description of this application are only used to indicate the relative direction or positional relationship, and do not imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. When the absolute position of the described object changes, its relative positional relationship may also change accordingly, so it cannot be understood as a limitation on this application. The "first", "second", "third" and similar terms used in the description of this application are only used for descriptive purposes to distinguish different components, and cannot be understood as indicating or implying relative importance. The similar words "one", "one" or "the" used in the description of this application should not be understood as an absolute limitation on quantity, but should be understood as the existence of at least one. The similar words "including" or "comprising" used in the description of this application mean that the elements or objects appearing in front of the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0037] In addition, it should be noted that, unless otherwise clearly specified and limited, the words "installed", "connected", "connected" and similar terms used in the description of this application should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. Technical personnel in the field can understand their specific meanings in this application according to the specific circumstances.

[0038] The following is combined with Figure 1 This application is described in further detail.

[0039] An engine fan rotor component, comprising:

[0040] A plurality of drums 1, each drum 1 having a plurality of oil-slinging holes distributed along the circumferential direction;

[0041] Multi-stage rotor discs 2, two adjacent stages of rotor discs 1 are connected via a drum 2;

[0042] The multi-stage rotor blades 3, the rotor blades 3 of each stage before the last stage rotor blades 3 are connected to the rotor disk 2 of the corresponding stage through a disk-tenon structure, and the last stage rotor blades 3 are integrally formed on the last stage rotor disk 1.

[0043] For the engine fan rotor component disclosed in the above-mentioned embodiment, technicians in the field can understand that the last-stage rotor disc 2 and its rotor blades 3 in the engine fan rotor component are relatively less prone to damage. Designing the last-stage rotor disc 2 and its rotor blades 3 as an integrated structure can reduce the overall weight of the engine fan rotor component to a certain extent and reduce the difficulty of processing and assembly. The rotor blades 3 of each stage before the last-stage rotor blade 3 are connected to the rotor disc 2 of the corresponding stage through a disc-tenon structure. When damage occurs, only the damaged part needs to be replaced, which is convenient for maintenance and has a low cost.

[0044] For the engine fan rotor component disclosed in the above-mentioned embodiment, technicians in the field can also understand that, based on the characteristics that the last-stage rotor disk 2 and its rotor blades 3 in the engine fan rotor component are relatively not prone to damage, combined with the advantages and disadvantages of the tenon-disk structure connection and one-piece molding between the fan rotor blades and the rotor disk, it is designed that the rotor blades 3 of each stage before the last-stage rotor blade 3 are connected to the rotor disk 2 of the corresponding stage through the tenon-disk structure, and the last-stage rotor blade 3 is integrally molded on the last-stage rotor disk 1, taking into account the weight, processing, assembly, cost, maintenance and other requirements of the fan rotor component.

[0045] Regarding the engine fan rotor component disclosed in the above embodiment, those skilled in the art can also understand that each drum 1 is designed with a plurality of oil-spinning holes distributed along the circumferential direction so as to spin out the oil on the inner side of the engine fan rotor component.

[0046] In some optional embodiments, in the above-mentioned engine fan rotor component, the front end of each drum 1 is connected to the trailing edge of the corresponding preceding stage rotor disk 2 by bolts;

[0047] The rear end of each drum 1 is integrally formed on the leading edge of the corresponding subsequent rotor disc 2 .

[0048] In some optional embodiments, in the above-mentioned engine fan rotor component, the outer edge of each stage of the rotor disc 2 before the last stage of the rotor disc 2 has a plurality of dovetail-shaped grooves extending in the axial direction;

[0049] The roots of the rotor blades 3 of each stage before the last stage of rotor blades 3 have dovetail tenons; the dovetail tenons of each stage are inserted into the dovetail tenon grooves of the corresponding stage.

[0050] In some optional embodiments, in the above-mentioned engine fan rotor component, one end of each stage of the dovetail tenon extends to the leading edge of the corresponding stage rotor wheel 2 to form a gap so that the dovetail tenons of each stage can be inserted into the dovetail tenon of the corresponding stage from there.

[0051] In some optional embodiments, in the above-mentioned engine fan rotor component, the leading edge of each stage of the rotor disk 2 before the last stage of the rotor disk 2 has a plurality of leading edge protrusions; the inner side of each leading edge protrusion has a slot;

[0052] The engine fan rotor component also includes:

[0053] A plurality of retaining rings 4 are each correspondingly clamped in a first-level clamping groove to cover the corresponding-level notch, thereby preventing the dovetail tenon of the corresponding level from escaping from the corresponding notch and preventing the rotor blade 3 of the corresponding level from loosening or falling off.

[0054] In some optional embodiments, the above-mentioned engine fan rotor component further includes:

[0055] A plurality of first-stage counterweight nails 5 are screwed to the leading edge of the first-stage rotor disc 2 along the circumferential direction;

[0056] There are a plurality of first-stage locking plates 6 , each of which is correspondingly placed between a first-stage counterweight nail 5 and a leading edge of the first-stage rotor disc 2 .

[0057] In some optional embodiments, in the above-mentioned engine fan rotor component, the trailing edge of the last stage rotor disk 2 has a trailing edge annular protrusion; the inner side of the trailing edge annular protrusion has an annular counterweight groove;

[0058] The engine fan rotor component also includes:

[0059] A plurality of last-stage connecting bolts 7;

[0060] A plurality of last-stage counterweight blocks 8 are circumferentially distributed in the annular counterweight groove; each last-stage counterweight block 8 is correspondingly screwed to the annular protruding portion of the trailing edge through a last-stage connecting bolt 7;

[0061] There are a plurality of last-stage locking plates 9, each of which is correspondingly placed between a last-stage connecting bolt 7 and the rear edge of the rear edge annular protruding portion.

[0062] In some optional embodiments, in the above-mentioned engine fan rotor component, there are two drums 1;

[0063] The rotor disk 2 and the rotor blades 3 have three stages.

[0064] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0065] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the scope of protection of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the scope of protection of the present application.

Claims

1. An engine fan rotor component, characterized in that: include: A plurality of drums (1), each drum (1) having a plurality of oil-spinning holes distributed along the circumferential direction; A multi-stage rotor wheel disc (2), wherein two adjacent stages of the rotor wheel disc are connected via a drum; A multi-stage rotor blade (3), wherein the rotor blades (3) of each stage before the last stage rotor blade (3) are connected to the rotor disc (2) of the corresponding stage via a disc-tenon structure, and the last stage rotor blade (3) is integrally formed on the last stage rotor disc; The outer edge of each stage of the rotor disc (2) before the last stage of the rotor disc (2) is provided with a plurality of dovetail-shaped tenon grooves extending in the axial direction; The roots of the rotor blades (3) of each stage before the last stage of the rotor blades (3) have dovetail tenons; the dovetail tenons of each stage are inserted into the dovetail tenon grooves of the corresponding stage; The front end of each drum (1) is connected to the rear edge of the corresponding preceding stage rotor disc (2) by bolts; The rear end of each drum (1) is integrally formed on the leading edge of the corresponding subsequent rotor disc (2).

2. The engine fan rotor component according to claim 1, characterized in that: One end of each dovetail-shaped tenon groove extends to the front edge of the corresponding rotor disc (2) to form a notch.

3. The engine fan rotor component according to claim 2, characterized in that: The front edge of each stage of the rotor disc (2) before the last stage of the rotor disc (2) is provided with a plurality of front edge protruding portions; the inner side of each stage of the front edge protruding portion is provided with a slot; The engine fan rotor component also includes: A plurality of retaining rings (4), each retaining ring (4) being correspondingly clamped in a first-level clamping slot to cover a corresponding-level gap.

4. The engine fan rotor component according to claim 1, characterized in that: Also includes: A plurality of first-stage counterweight nails (5) are screwed to the leading edge of the first-stage rotor disc (2) along the circumferential direction; A plurality of first-stage locking plates (6), each first-stage locking plate (6) being cushioned between a first-stage counterweight nail (5) and a front edge portion of a first-stage rotor wheel disc (2).

5. The engine fan rotor component according to claim 1, characterized in that: The last stage rotor wheel disc (2) has a trailing edge annular protrusion at the trailing edge; the inner side of the trailing edge annular protrusion has an annular counterweight groove; The engine fan rotor component also includes: A plurality of last-stage connecting bolts (7); A plurality of last-stage counterweight blocks (8) are distributed in the annular counterweight groove along the circumferential direction; each last-stage counterweight block (8) is screwed to the annular protruding portion of the trailing edge via a corresponding last-stage connecting bolt (7); A plurality of last-stage locking plates (9), each last-stage locking plate (9) being cushioned between a last-stage connecting bolt (7) and the rear edge of the rear edge annular protruding portion.

6. The engine fan rotor component according to claim 1, characterized in that: There are two drums (1); The rotor disk (2) and the rotor blades (3) have three stages.

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