CN-116398472-B - Blade adjusting device and air compressor

CN116398472BCN 116398472 BCN116398472 BCN 116398472BCN-116398472-B

Abstract

The application discloses a blade adjusting device and a compressor. The blade adjusting device is applied to a compressor, the compressor comprises a casing, a hub positioned at the inner side of the casing and blades arranged between the casing and the hub, the blade adjusting device comprises a actuating mechanism, a linkage ring, a rocker arm and a joint bearing, the actuating mechanism is used for driving the linkage ring to rotate along the circumferential direction of the linkage ring, a first end of the rocker arm is connected with a shaft neck of the blades, a second end of the rocker arm is connected with the linkage ring in a rotating manner through the joint bearing, and a second end of the rocker arm is connected with the joint bearing in a sliding manner. The blade adjusting device provided by the application can simplify the movement of adjusting the blade mounting angle, and improve the transmission efficiency of the blade adjusting process and the design precision of adjusting the blade mounting angle.

Inventors

MA NING
ZHOU WENJING
YANG XIAOQING
LAN FAXIANG
TAN XUGANG

Assignees

中国航空发动机研究院

Dates

Publication Date: 20260505
Application Date: 20230427

Claims (7)

1. The blade adjusting device is characterized by being applied to a compressor, wherein the compressor comprises a casing, a hub positioned on the inner side of the casing and a blade arranged between the casing and the hub, the blade adjusting device comprises an actuating mechanism, a linkage ring, a rocker arm and a joint bearing, the actuating mechanism is used for driving the linkage ring to rotate along the circumferential direction of the linkage ring, a first end of the rocker arm is connected with a shaft neck of the blade, a second end of the rocker arm is connected with the linkage ring in a rotating way through the joint bearing, and a second end of the rocker arm is connected with the joint bearing in a sliding way; the outer side of the casing is provided with a first raceway groove, the bottom of the linkage ring is provided with a second raceway groove, the first raceway groove and the second raceway groove form a raceway cavity, the blade adjusting device further comprises a raceway bearing, wherein the raceway bearing is positioned in the raceway cavity; the blade adjusting device further comprises a switching structure and a rotating assembly part, the first end of the rocker arm is rotationally connected with the switching structure, the switching structure is clamped with the shaft neck, and the rotating assembly part fixes the switching structure and the shaft neck together; The blade adjusting device further comprises a support bearing and a bearing cover plate, a casing counter bore is formed in the outer side of the casing, the support bearing is arranged in the casing counter bore, an inner ring of the support bearing is connected with the shaft neck and the switching structure respectively, and an outer ring of the support bearing is pressed in the casing counter bore by the bearing cover plate.
2. The blade adjustment device of claim 1, wherein the actuation mechanism comprises a drive motor and a linear motion mechanism in flexible driving connection with the drive motor, the linear motion mechanism being connected with the linkage ring.
3. The blade adjustment device of claim 2, wherein the linear motion mechanism comprises a screw and a first support in threaded connection with the screw, the first support is connected with the linkage ring, and the drive motor is in flexible transmission connection with the screw.
4. The blade adjustment device of claim 3, wherein the actuating mechanism further comprises a flexible coupling, a second support, and a rotational coupling provided to the second support, the drive motor is coupled to the screw via the flexible coupling, and the screw is coupled to the second support via the rotational coupling.
5. The blade adjustment device of claim 1, wherein the linkage ring comprises a linkage ring body and a linkage ring cover plate, the linkage ring cover plate is provided with a mounting hole, the knuckle bearing comprises an inner ring and an outer ring, the inner ring is matched with the outer ring, the outer ring is arranged in the linkage ring body, and the second end of the rocker arm is slidably connected with the inner ring through the mounting hole.
6. The blade adjustment device according to claim 1, wherein a relation between the amount of change in the mounting angle of the blade and the amount of change in the angle of circumferential rotation of the link ring satisfies: Wherein, the The radius of the motion trail is the center point of the knuckle bearing; the projection distance between the center point of the knuckle bearing and the axis of the journal is along the axis direction of the linkage ring on the plane perpendicular to the axis of the journal; The linkage ring rotates along the circumferential direction for adjusting the angle before and after the blade; when the installation angle of the blade is 0 DEG, the included angle between the projection of the connecting line of the central point of the knuckle bearing and the axis of the linkage ring on the plane perpendicular to the axis of the linkage ring and the axis of the shaft neck; The change of the installation angle of the blade before and after the blade is adjusted; The angle between the axis of the rocker arm and the projection of the axis of the coupling ring onto a plane perpendicular to the axis of the blade journal is the angle of 0 ° for the blade mounting angle.
7. A compressor comprising a casing, a hub, a vane and a vane adjustment device according to any one of claims 1 to 6, said hub being located inside said casing, said vane being located between said casing and said hub, said vane adjustment device comprising a rocker arm journalled to said vane.

Description

Blade adjusting device and air compressor Technical Field The application relates to the technical field of aeroengines, in particular to a blade adjusting device and a compressor. Background In order to stably work the compressor in the engine, the flow of the compressor needs to be regulated according to the actual operation condition, therefore, the stator blades in the compressor are set to be of an adjustable structure, the stator blades are rotated through the blade regulating device, and the flow of the compressor is regulated by changing the installation angle of the stator blades. However, the adjustment process of the existing blade adjustment device comprises a series of complex three-dimensional space movements, so that when the installation angle of the stator blade is adjusted, the design precision is low, and meanwhile, the transmission efficiency of the blade adjustment process is low, and the stability and reliability of blade adjustment are also affected. Disclosure of Invention The application aims to provide a blade adjusting device and a compressor, which are used for simplifying the movement of adjusting the blade mounting angle and improving the transmission efficiency of blade adjustment and the design precision of adjusting the blade mounting angle. In order to achieve the aim, the application provides a blade adjusting device which is applied to a compressor, the compressor comprises a casing, a hub and a blade arranged between the casing and the hub, the hub is positioned on the inner side of the casing, the blade adjusting device comprises an actuating mechanism, a linkage ring, a rocker arm and a joint bearing, the actuating mechanism is used for driving the linkage ring to rotate along the circumferential direction of the linkage ring, a first end of the rocker arm is connected with a shaft neck of the blade, a second end of the rocker arm is connected with the linkage ring in a rotating manner through the joint bearing, and a second end of the rocker arm is connected with the joint bearing in a sliding manner. Compared with the prior art, in the blade adjusting device provided by the application, the actuating mechanism drives the linkage ring to rotate along the circumferential direction of the linkage ring, and the linkage ring is rotationally connected with the second end of the rocker arm through the knuckle bearing, so that the linkage ring can drive the second end of the rocker arm to move when the actuating mechanism drives the linkage ring to rotate along the circumferential direction of the linkage ring. Because the first end of the rocker arm is connected with the shaft neck of the blade, when the linkage ring drives the second end of the rocker arm to move, the first end of the rocker arm can drive the shaft neck of the blade to rotate, and the adjustment of the installation angle of the blade is realized. Meanwhile, in the process of adjusting the blade, the linkage ring only rotates along the circumferential direction, the linkage ring can drive the second end of the rocker arm to move, and because the first end of the rocker arm is connected with the shaft neck of the blade and the second end of the rocker arm is rotationally connected with the linkage ring through the joint bearing, the position of the first end of the rocker arm is fixed, the joint bearing can rotate along the circumferential direction of the linkage ring, and the second end of the rocker arm is in sliding connection with the joint bearing. In the process of adjusting the blades by the blade adjusting device, the motion of the linkage ring and the rocker arm can be simplified into plane motion, the motion of adjusting the mounting angle of the blades is simplified, the design precision of blade adjustment is improved, and the distance between the axis of the blade journal and the linkage ring is kept unchanged because the linkage ring only rotates along the circumferential direction of the linkage ring, so that the size of a driving force arm in the blade adjusting process is unchanged, the loss of torque is reduced, the driving efficiency is improved, and the stability and the reliability of blade adjustment are ensured. The application also provides a compressor, which comprises a casing, a hub, blades and the blade adjusting device in the technical scheme, wherein the hub is positioned at the inner side of the casing, the blades are arranged between the casing and the hub, and rocker arms contained in the blade adjusting device are connected with shaft journals of the blades. Compared with the prior art, the beneficial effects of the air compressor provided by the application are the same as those of the blade adjusting device in the technical scheme, and the description is omitted here. Drawings The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the