CN215672886U - Adjustable stationary blade linkage ring limiting mechanism and compressor and engine adopting same - Google Patents

Abstract

The utility model provides a limiting mechanism of a linkage ring of an adjustable static blade of a gas compressor, wherein the gas compressor comprises a casing and a plurality of adjustable static blades arranged in the casing, each adjustable static blade can rotate around a rotating shaft of the corresponding adjustable static blade to adjust the angle relative to the casing, the plurality of adjustable static blades are rotated by the acting force of the linkage ring and are linked with each other, the linkage ring and the casing are concentric, the linkage ring is uniformly provided with a plurality of limiting mechanisms in the circumferential direction, the limiting mechanisms are used for keeping the linkage ring and the casing concentric, the limiting mechanisms comprise limiting screws and rolling wheels, the limiting screws are fixedly arranged on the linkage ring, the rolling wheels are fixedly arranged at one ends of the limiting screws, close to the casing, and abut against a boss of the casing on the casing, and the rolling wheels are arranged to move at least relative to the boss of the casing in the circumferential direction of the casing. The limiting mechanism of the compressor adjustable stationary blade linkage ring is used for preventing the linkage ring from eccentric deformation in the movement process and preventing the clamping stagnation caused by excessive friction force generated between the limiting mechanism and a casing.

Description

Adjustable stationary blade linkage ring limiting mechanism and compressor and engine adopting same

Technical Field

The utility model relates to an aeroengine, in particular to a gas compressor adjustable stationary blade link ring limiting mechanism, a gas compressor adopting the link ring limiting mechanism and an engine adopting the link ring limiting mechanism.

Background

In axial flow compressor design, in order to meet the aerodynamic performance of the compressor at an off-design rotation speed, the stator blade near the upstream of the airflow flowing direction is usually designed as an adjustable stator blade. The adjustable stator blade needs to be adjusted in a linkage mode through a linkage ring structure, and therefore the adjustment angles of the adjustable stator blades at the same stage in the adjustment process are consistent. To satisfy the above function, the link ring must maintain a certain concentricity with the compressor casing during the movement. Therefore, in the engineering design process, a limit screw design is usually adopted between the linkage ring and the casing, so that the linkage ring is prevented from being eccentric in the movement process. As shown in fig. 1, one end of the limit screw 4 is in threaded connection with the linkage ring 1, and a certain reserved gap 3 is reserved between the other end of the limit screw and the surface of the boss 21 of the casing, when the linkage ring 1 is eccentric by the action of the tension of the actuating cylinder, the limit screw 4 will push against the surface of the boss 21 of the casing, so as to prevent the linkage ring 1 from further eccentric deformation, and thus a certain concentricity (a small reserved gap 3 is generally reserved for keeping a good concentricity) is kept. In the process, the end of the limit screw 4 slides on the surface of the boss 21 of the casing. In the engineering practice process, the compressor operation process can cause the casing to expand by heating, so that the reserved gap 3 between the limiting screw 4 and the surface of the casing boss 21 is reduced to zero, the casing boss 21 is forced to apply pressure to the limiting screw 4, the sliding friction force when the end of the limiting screw 4 slides relative to the casing 2 is increased sharply, the limiting screw 4 slides difficultly or even is clamped on the surface of the casing boss 21, the linkage ring 1 is difficult to adjust or is clamped, and the adjustable stationary blade limiting mechanism fails or even causes other test safety problems.

Therefore, there is a need for a position limiting mechanism for an adjustable stationary blade link ring of a compressor, which prevents the position limiting mechanism from being stuck due to excessive friction between the position limiting mechanism and a casing.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a limiting mechanism of an adjustable stationary blade link ring of an air compressor, which is used for preventing the link ring from being eccentric in the movement process and preventing the limiting mechanism from generating excessive friction force between the limiting mechanism and a casing to cause clamping stagnation.

In order to solve the technical problem, the utility model provides a limiting mechanism of an adjustable stationary blade link ring of a gas compressor, the compressor comprises a casing and a plurality of adjustable stationary blades arranged inside the casing, each adjustable stationary blade can rotate around a respective adjustable stationary blade rotating shaft to adjust an angle relative to the casing, the plurality of adjustable stationary blades are rotated and linked with each other by an acting force of a linkage ring, the linkage ring is concentric with the casing, and a plurality of limiting mechanisms are uniformly arranged on the periphery of the linkage ring, the limiting mechanisms are used for keeping the linkage ring and the casing concentric, it is characterized in that the limiting mechanism comprises a limiting screw and a roller, the limiting screw is fixedly arranged on the linkage ring, the roller is fixedly arranged at one end of the limiting screw close to the casing and is abutted against a casing boss on the casing, the roller is arranged to be movable at least relative to the casing boss in a circumferential direction of the casing.

The first bearing is fixedly arranged on the roller and connected with the limiting screw through the support, and the first bearing is used for enabling the roller to roll under the driving of the linkage ring so as to move relative to the casing boss.

Further, the first bearing comprises an inner ring and an outer ring, the outer ring is fixedly connected with the roller so as to allow the roller to roll under the driving of the linkage ring, and the inner ring is fixedly connected with the support and used for fixing the roller to one end of the limiting screw.

The support is fixed on the limit screw through the second bearing so as to rotate around the central shaft of the limit screw, and the moving direction of the roller can be changed while the roller rolls under the driving of the linkage ring.

Further, the second bearing is fixedly connected with the limiting screw through threads.

Further, the limit screw is arranged to be adjustable within a certain range along the radial direction of the linkage ring, so that the concentricity of the linkage ring and the casing is controlled.

The utility model also provides a gas compressor, which comprises the gas compressor adjustable stationary blade linkage ring limiting mechanism.

Further, include 6 stop gear.

The utility model also provides an engine comprising the compressor.

The utility model has the beneficial effects that:

1. according to the limiting mechanism of the adjustable stationary blade linkage ring of the gas compressor, the roller is arranged at the end part of the limiting screw, and rolling friction force is generated between the limiting mechanism and the casing.

2. According to the limiting mechanism of the adjustable stationary blade linkage ring of the gas compressor, the end part of the limiting screw is in a universal wheel structure formed by the roller, the bearing and the bracket, so that the linkage ring can move smoothly along the axial direction and the circumferential direction of the casing at the same time, the limiting mechanism allows circumferential movement when the linkage ring rotates, and the linkage ring can be axially adjusted by the limiting mechanism when the linkage ring is subjected to axial acting force.

Drawings

The foregoing summary, as well as the following detailed description of the utility model, will be better understood when read in conjunction with the appended drawings. It is to be noted that the figures are only intended as examples of the claimed solution. In the drawings, like reference characters designate the same or similar elements.

FIG. 1 is a schematic view of a prior art adjustable stationary blade linkage ring spacing mechanism for a compressor;

FIG. 2 is a schematic view of a compressor adjustable stationary blade linkage ring limiting mechanism according to an embodiment of the utility model;

FIG. 3 is a partially enlarged schematic view of a compressor adjustable stationary blade linkage ring limiting mechanism according to an embodiment of the utility model;

fig. 4 is a schematic diagram of the stroke of the adjustable stationary blade linkage ring of the compressor driving the rocker arm to move according to an embodiment of the utility model.

Wherein the reference numerals are as follows:

1 link ring

2 casing

21 casing boss

3 reserving a gap

4 limiting screw

5 roller

6 first bearing

7 second bearing

8 support

9 Rocker arm

10 adjustable stationary blade rotating shaft

Detailed Description

The detailed features and advantages of the present invention are described in detail in the detailed description which follows, and will be sufficient for anyone skilled in the art to understand the technical content of the present invention and to implement the present invention, and the related objects and advantages of the present invention will be easily understood by those skilled in the art from the description, claims and drawings disclosed in the present specification.

FIG. 1 is a schematic view of a prior art adjustable stationary blade linkage ring limiting mechanism of a compressor; FIG. 2 is a schematic diagram of a compressor adjustable stationary blade linkage ring limiting mechanism according to an embodiment of the utility model; FIG. 3 is a partially enlarged schematic view of a compressor adjustable stationary blade linkage ring limiting mechanism according to an embodiment of the utility model; fig. 4 is a schematic diagram of a stroke of a rocker arm driven by a compressor adjustable stationary blade linkage ring according to an embodiment of the utility model.

As shown in fig. 2-4, the compressor of the compressor adjustable stationary blade linkage ring limiting mechanism of the embodiment includes a casing 2 and a plurality of adjustable stationary blades (not shown) arranged inside the casing 2, each adjustable stationary blade can rotate around a respective adjustable stationary blade rotating shaft 10 to adjust an angle, the plurality of adjustable stationary blades are rotated by an acting force of a linkage ring 1 and are linked with each other, the linkage ring 1 is connected with the adjustable stationary blades through a rocker arm 9, the linkage ring 1 is concentric with the casing 2, and the plurality of limiting mechanisms are uniformly arranged on the circumference of the linkage ring 1, the limiting mechanism is used for keeping the linkage ring 1 and the casing 2 concentric, wherein the limiting mechanism comprises a limiting screw 4 and a roller 5, the limiting screw 4 is fixedly arranged on the linkage ring 1, the roller 5 is fixedly arranged at one end, close to the casing 2, of the limiting screw 4 and abuts against a casing boss 21 on the casing 2, and the roller 5 is arranged to move at least relative to the casing boss 21 along the circumferential direction of the casing.

It can be understood that the link ring 1 is driven by a driving device (e.g., a ram) to rotate, and the rocker arms 9 rotate the adjustable stationary blades to adjust the angle of the adjustable stationary blades, and in this process, when the link ring 1 is eccentrically deformed by a driving force, a plurality of position-limiting mechanisms uniformly arranged in the circumferential direction of the link ring keep the link ring 1 concentric with the casing 2. In addition, under the drive of the link ring 1, the roller 5 of the limiting mechanism moves on the casing boss 21 along the circumferential direction of the casing, and rolling friction force is generated between the roller 5 and the casing boss 21, and the friction force is smaller and far smaller than sliding friction force generated by a limiting screw directly contacting with the casing boss in the prior art, so that the roller 5 in the limiting mechanism of the embodiment cannot move difficultly to cause clamping stagnation even when the casing 2 is heated and expanded.

The limiting mechanism further comprises a first bearing 6 and a support 8, the first bearing 6 is fixedly arranged on the roller 5 and is connected with the limiting screw 4 through the support 8, and the first bearing 6 is used for enabling the roller 5 to roll under the driving of the linkage ring 1 so as to move relative to the casing boss 21. The first bearing 6 comprises an inner ring and an outer ring, the outer ring is fixedly connected with the roller 5 so as to allow the roller 5 to roll under the driving of the link ring 1, and the inner ring is fixedly connected with the bracket 8 and used for fixing the roller 5 to one end of the limit screw 4.

It will be appreciated that as the link ring rotates, the roller 5 is driven to roll by the bracket 8 and the first bearing 6, and thus can move in a particular direction (e.g., the circumferential direction of the casing) relative to the casing boss 21.

The limiting mechanism further comprises a second bearing 7, the second bearing 7 is arranged at one end, close to the casing 2, of the limiting screw 4, the support 8 is fixed on the limiting screw 4 through the second bearing 7 and can rotate around the central shaft of the limiting screw 4, the second bearing 7 is connected with the first bearing 6 through the support 8, therefore, a universal wheel structure is formed, and the moving direction of the roller 5 can be changed easily when the roller rolls under the driving of the linkage ring 1. The second bearing 7 is fixedly connected with the limit screw 4 through threads.

It should be noted that the second bearing may be configured to rotate 360 about the central axis of the limit screw, thereby allowing the direction of movement of the roller to vary over a range of radial directions of 360 about the central axis of the limit screw.

It can be understood that, as shown in fig. 4, when the link ring 1 rotates, the rocker arm 9 is driven to rotate along the adjustable stationary blade rotating shaft 10, at this time, the link ring 1 not only rotates in the circumferential direction around the casing central shaft, but also is pushed (or pulled) by the rocker arm 9 to move in the axial direction, so that under the stress condition, the roller 5 can automatically adjust the moving direction through the first bearing 6, the second bearing 7 and the bracket 8, and moves along the spiral line on the casing boss 21, thereby ensuring that the link ring 1 can move in the axial direction and rotate in the circumferential direction at the same time.

The limit screw 4 is arranged to be adjustable in a radial direction of the coupling ring within a certain range, for example by means of a threaded engagement, so as to control the concentricity of the coupling ring and the casing.

In another aspect, a compressor is provided, which includes the compressor adjustable stationary blade linkage ring limiting mechanism of the embodiment.

The number of the limiting mechanisms is 6.

It should be noted that any suitable other number of stop mechanisms may be used, although in this embodiment 6 stop mechanisms are used.

In another aspect, an engine is provided that includes the compressor of this embodiment.

The terms and expressions which have been employed herein are used as terms of description and not of limitation. The use of such terms and expressions is not intended to exclude any equivalents of the features shown and described (or portions thereof), and it is recognized that various modifications may be made within the scope of the claims. Other modifications, variations, and alternatives are also possible. Accordingly, the claims should be looked to in order to cover all such equivalents.

Also, it should be noted that although the present invention has been described with reference to the current specific embodiments, it should be understood by those skilled in the art that the above embodiments are merely illustrative of the present invention, and various equivalent changes or substitutions may be made therein without departing from the spirit of the present invention, and therefore, it is intended that all changes and modifications to the above embodiments within the spirit of the present invention shall fall within the scope of the appended claims.

Claims (9)

1. A linkage ring limiting mechanism for an adjustable stationary blade of a gas compressor, the gas compressor comprises a casing and a plurality of adjustable stationary blades arranged in the casing, each adjustable stationary blade can rotate around a respective adjustable stationary blade rotating shaft to adjust an angle relative to the casing, the plurality of adjustable stationary blades are rotated by an acting force of a linkage ring and are linked with each other, the linkage ring is concentric with the casing, and a plurality of limiting mechanisms are uniformly arranged on the periphery of the linkage ring, the limiting mechanisms are used for keeping the linkage ring and the casing concentric, it is characterized in that the limiting mechanism comprises a limiting screw and a roller, the limiting screw is fixedly arranged on the linkage ring, the roller is fixedly arranged at one end of the limiting screw close to the casing and is abutted against a casing boss on the casing, the roller is arranged to be movable at least relative to the casing boss in a circumferential direction of the casing.

2. The limit mechanism according to claim 1, further comprising a first bearing and a bracket, wherein the first bearing is fixedly disposed on the roller and is connected to the limit screw through the bracket, and the first bearing is configured to enable the roller to roll under the driving of the link ring so as to move relative to the casing boss.

3. The spacing mechanism of claim 2, wherein said first bearing includes an inner race and an outer race, said outer race being fixedly coupled to said roller to allow said roller to roll under the urging of said link ring, said inner race being fixedly coupled to said bracket for securing said roller to an end of said spacing screw.

4. The limit mechanism according to claim 2, further comprising a second bearing disposed at an end of the limit screw close to the casing, wherein the bracket is fixed to the limit screw through the second bearing so as to be rotatable around a central axis of the limit screw, so that the roller can change a moving direction while rolling under the driving of the link ring.

5. The spacing mechanism of claim 4, wherein said second bearing is threadably fixedly connected to said spacing screw.

6. A spacing mechanism according to any of claims 1 to 5, wherein said spacing screw is arranged to be adjustable in a range radially of said link ring to control concentricity of said link ring and said casing.

7. An air compressor, characterized by comprising the air compressor adjustable stationary blade linkage ring limiting mechanism as claimed in any one of claims 1 to 6.

8. An air compressor according to claim 7, characterized by comprising 6 said limiting mechanisms.

9. An engine comprising a compressor as claimed in claim 7 or 8.

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