CN117090803A - Compressor stator blade adjustment mechanism and compressor - Google Patents

Abstract

The invention discloses a compressor stator blade adjusting mechanism and a compressor, and relates to the technical field of aeroengines. The driving ring is always concentric with the casing, so that the rotation angle consistency of the blades is ensured, the performance of the air compressor is improved, in addition, the shaft sleeve is in threaded connection with the shaft hole of the casing, a spiral seal can be formed, the pneumatic loss is reduced, and the working efficiency of the air compressor is improved.

Description

Compressor stator blade adjustment mechanism and compressor

Technical Field

The invention relates to the technical field of aeroengines, in particular to a compressor stator blade adjusting mechanism and a compressor.

Background

The adjustable stator blade is VSV (Variable Stator Vane) for short, and can change the installation angle according to the running condition of the engine. The main purpose of applying VSV on an engine is to improve the working stability of the engine and prevent surge. The VSV adjusting mechanism is used for driving the adjustable stator blade to rotate, changing the installation angle of the adjustable stator blade, and adjusting the through flow of the blade grid and the attack angle of the airflow behind the grid so as to ensure the normal and stable operation of the high-pressure compressor.

The adjustable stator vane is widely used in aeroengines. In general, in order to make the rotation angles of a plurality of adjustable stator blades at the same stage more consistent in a gas compressor, a supporting device is designed under a linkage ring, for example, patent number CN 106545524B discloses a gas compressor stator blade adjusting mechanism, as shown in fig. 1, a linkage ring 1 'is matched with a casing 15' through a guiding member 152 'fixed on the linkage ring, the guiding member 152' can restrict the axial freedom degree of the linkage ring 1', and the guiding member 152' is the supporting device of the linkage ring. The supporting device enables the linkage ring and the compressor casing to be coaxial or concentric in a certain working state, the state is generally the maximum working state of the engine (the thermal deformation expansion of the casing is maximum), gaps are formed between the supporting device and the casing in other working states, the linkage ring sinks under the action of gravity, the linkage ring and the casing are eccentric, and therefore the difference of the rotation angles of the adjustable blades at different positions of the same stage can be caused.

Disclosure of Invention

The invention aims to solve the technical problem that in the prior art, the connecting structure of a stator blade adjusting mechanism of a compressor is influenced by deformation of a casing, so that a linkage ring and the casing are eccentric, and further, the rotation angles of adjustable blades at different positions at the same level are different.

The invention solves the technical problems by the following technical scheme:

the utility model provides a compressor stator blade adjustment mechanism, its includes link ring and connecting piece, the first end of connecting piece with the link ring is connected, the second end of connecting piece is connected with the shaft part of stator blade, the link ring passes through the connecting piece drives the stator blade is rotatory, the second end of connecting piece set up in the shaft hole of receiver and with shaft hole threaded connection, the shaft part normal running fit of stator blade in the hole of the second end of connecting piece.

In the scheme, the second end of the connecting piece is in threaded connection with the shaft hole of the casing, the second end of the connecting piece cannot move along the axial direction of the shaft hole under the condition that rotation does not occur, and the linkage ring is in threaded connection with the shaft hole of the casing through the connecting piece, so that the linkage ring is fixed on the casing. On the other hand, when the receiver is in different operating conditions, the linkage ring can drive the stator blade through the connecting piece to change the angle, simultaneously, because the second end of connecting piece passes through threaded connection with the shaft hole of receiver, the rotation can promote the second end of connecting piece to take place to remove along the axial direction in shaft hole, and then can drive the linkage ring and take place the follow-up, can offset the change that the deformation that the receiver took place because of thermal expansion leads to the position of linkage ring to take place, can make the actuating ring remain concentricity with the receiver all the time, guarantee blade corner uniformity, improve the compressor performance. And the second end of the connecting piece is connected with the shaft hole of the casing through threads, so that a spiral seal can be formed, the pneumatic loss is reduced, and the working efficiency of the air compressor is improved.

Preferably, the connecting piece comprises a shaft sleeve and a linkage part, wherein a first end of the linkage part is connected with the linkage ring, a second end of the linkage part is respectively connected with the shaft sleeve and the shaft part of the stator blade, and the shaft sleeve is arranged in the shaft hole and is in threaded connection with the shaft hole.

In this scheme, the linkage ring passes through linkage portion drive stator blade and axle sleeve rotation, when changing stator blade, the rotation can make the axle sleeve take place to remove along the axial direction in shaft hole, and then can drive the linkage ring and take place the follow-up, can offset the change that the deformation that the receiver took place because of thermal expansion leads to the position of linkage ring to take place.

Preferably, a placing groove is formed in one end, close to the linkage part, of the shaft sleeve, and the second end of the linkage part is arranged in the placing groove.

In this scheme, the linkage portion passes through the standing groove with the axle sleeve to be connected, simple structure to it is reliable to connect.

Preferably, a spacer is disposed between the second end of the linkage portion and the placement groove, and the spacer is used for adjusting the height of the linkage portion in the installation state.

In this scheme, through gasket height-adjusting, can compensate the linkage portion and the axle sleeve and cause the deviation because of the machining precision.

Preferably, the linkage part and the shaft sleeve are integrally formed.

In this scheme, integrated into one piece has saved the process of linkage portion and axle sleeve assembly to the precision of linkage portion and axle sleeve is controllable.

Preferably, the linkage part is a rocker arm, a first end of the rocker arm and a second end of the rocker arm are respectively provided with a through hole used for connection, the through hole of the first end of the rocker arm is used for being hinged with the linkage ring, and the through hole of the second end of the rocker arm is sleeved on the shaft part of the stator blade and used for driving the stator blade to rotate.

In this scheme, through the through-hole of rocking arm first end with the link ring hinge, the link ring can drive the rocking arm rotatory, the through-hole cover of second end establish with stator blade's axial region to conveniently drive stator blade rotation.

Preferably, the shaft portion protrudes out of the shaft sleeve, the second end of the linkage portion is sleeved on the portion, protruding out of the shaft sleeve, of the shaft portion, and the second end of the linkage portion is fixed with the shaft sleeve through a fastening device.

In this scheme, the linkage portion is more reliable and stable with the connection of axle sleeve.

Preferably, a guide groove is provided at a connection portion of the second end of the connector and any one of the shaft portions of the stator blade, and a guide portion slidably fitted into the guide groove is provided at the other connection portion.

In this scheme, the guiding portion can slide in the guiding groove, and the linkage portion can not drive the axial direction removal in stator blade along the receiver shaft hole when driving stator blade rotation.

Preferably, a first sealing ring is arranged at the joint of one end, close to the blade body, of the stator blade and the shaft part, of the connecting piece, two sides of the first sealing ring are respectively abutted to the connecting piece and the stator blade, and the first sealing ring has elasticity;

and/or a second sealing ring is arranged between the end face of the second end of the connecting piece, which is far away from the blade body of the stator blade, and the end face of the end of the casing, which is far away from the blade body of the stator blade, and two sides of the second sealing ring are respectively abutted to the connecting piece and the casing, and the second sealing ring has elasticity.

In the scheme, the first sealing ring can effectively prevent gas leakage between the stator blade and the shaft sleeve, reduce pneumatic loss and improve the working efficiency of the gas compressor, and when the second end of the connecting piece rotates to counteract the change of different working states of the casing, the second end of the connecting piece can tightly press the first sealing ring, the first sealing ring can be compressed along the axial direction of the shaft hole due to elasticity, and when the first sealing ring is compressed, the sealing formed by the first sealing ring is tighter, and gas flow cannot leak from a gap between the stator blade and the shaft sleeve; the second sealing ring can effectively prevent gas leakage between the second end of the connecting piece and the casing, the second end of the connecting piece is matched with the spiral seal formed between the second end of the connecting piece and the casing, the sealing between the second end of the connecting piece and the casing is more reliable, the second sealing ring has elasticity, the second sealing ring can be compressed along the axial direction of the shaft hole, and when the second sealing ring is compressed, the sealing formed by the second sealing ring is tighter.

Preferably, a compressor includes a compressor stator vane adjustment mechanism as described above.

In this scheme, the link ring of compressor remains concentricity with the receiver all the time, guarantees blade corner uniformity, improves the compressor performance to, the second end of connecting piece passes through threaded connection with the shaft hole of receiver, can also form screw seal, reduces pneumatic loss, improves compressor work efficiency.

The invention has the positive progress effects that: in the scheme, the second end of the connecting piece is in threaded connection with the shaft hole of the casing, the second end of the connecting piece cannot move along the axial direction of the shaft hole under the condition that rotation does not occur, and the linkage ring is in threaded connection with the shaft hole of the casing through the connecting piece, so that the linkage ring is fixed on the casing. On the other hand, when the receiver is in different operating conditions, the linkage ring can drive the stator blade through the connecting piece to change the angle, simultaneously, because the second end of connecting piece passes through threaded connection with the shaft hole of receiver, the rotation can promote the second end of connecting piece to take place to remove along the axial direction in shaft hole, and then can drive the linkage ring and take place the follow-up, can offset the change that the deformation that the receiver took place because of thermal expansion leads to the position of linkage ring to take place, can make the actuating ring remain concentricity with the receiver all the time, guarantee blade corner uniformity, improve the compressor performance. And the second end of the connecting piece is connected with the shaft hole of the casing through threads, so that a spiral seal can be formed, the pneumatic loss is reduced, and the working efficiency of the air compressor is improved.

Drawings

FIG. 1 is a schematic view of a prior art compressor stator vane adjustment mechanism;

fig. 2 is a schematic structural view of a stator vane adjusting mechanism of a compressor according to embodiment 1 of the present invention;

FIG. 3 is a top view of a compressor stator vane adjustment mechanism according to embodiment 1 of the present invention;

fig. 4 is a schematic view showing a partial structure of a stator vane adjusting mechanism of a compressor according to embodiment 1 of the present invention;

fig. 5 is a schematic structural view of a sleeve of a compressor stator vane adjusting mechanism according to embodiment 1 of the present invention;

fig. 6 is a schematic structural view of a stator vane adjusting mechanism of a compressor according to embodiment 2 of the present invention;

fig. 7 is a schematic view showing another state of the compressor stator vane adjusting mechanism according to embodiment 2 of the present invention.

Casing 10

Stator vanes 20

Nut 201

Shaft sleeve 30

Placement tank 301

Gasket 40

First end 49 of the connector

Second end 50 of the connector

Linkage part 501

Bolt 502

Linkage ring 60

First seal ring 70

Second seal ring 80

Case center line 90

Detailed Description

The invention is further illustrated by means of examples which follow, without thereby restricting the scope of the invention thereto.

Example 1

As shown in fig. 2-5, an adjusting mechanism for a stator vane 20 of a compressor includes a linkage ring 60, and a connecting member, wherein a first end 49 of the connecting member is connected with the linkage ring 60, a second end 50 of the connecting member is connected with a shaft portion of the stator vane 20, the linkage ring 60 drives the stator vane 20 to rotate through the connecting member, the second end 50 of the connecting member is disposed in a shaft hole of a casing 10 and is in threaded connection with the shaft hole, and the shaft portion of the stator vane 20 is in rotary fit with an inner hole of the second end 50 of the connecting member.

In the scheme, the second end 50 of the connecting piece is in threaded connection with the shaft hole of the casing 10, the second end 50 of the connecting piece cannot move along the axial direction of the shaft hole under the condition that rotation does not occur, the linkage ring 60 is in threaded connection with the shaft hole of the casing 10 through the connecting piece, and the linkage ring 60 is fixed on the casing 10. On the other hand, when the casing 10 is in different working conditions, the linkage ring 60 can drive the stator blade 20 through the connecting piece to change the angle, meanwhile, as the second end 50 of the connecting piece is in threaded connection with the shaft hole of the casing 10, the second end 50 of the connecting piece can be driven to move along the axial direction of the shaft hole by rotation, and then the linkage ring 60 can be driven to follow up, so that the change of the position of the linkage ring 60 caused by the deformation of the casing 10 due to thermal expansion can be counteracted, the drive ring can be always kept concentric with the casing 10, the consistency of the blade rotation angle is ensured, and the performance of the air compressor is improved. In addition, the second end 50 of the connecting piece is in threaded connection with the shaft hole of the casing 10, so that a screw seal can be formed, pneumatic loss is reduced, and working efficiency of the air compressor is improved. Wherein the rotation of the linkage ring 60 is realized by a driving part (not shown in the figure), one end of the driving part is connected with the driving device, and the other end of the driving part is connected with the linkage ring 60 to drive the linkage ring 60 to rotate, the linkage ring 60 is used for being arranged on a casing 10 and can rotate around the circumference of the casing 10,

in this embodiment, the connector includes a shaft sleeve 30 and a linkage portion 501, the shaft sleeve 30 is located at a second end 50 of the connector, a first end of the linkage portion 501 is connected with the linkage ring 60, a second end of the linkage portion 501 is connected with the shaft sleeve 30 and the shaft portion of the stator blade 20, respectively, and the shaft sleeve 30 is disposed in the shaft hole and is in threaded connection with the shaft hole. The linkage ring 60 drives the stator blade 20 and the shaft sleeve 30 to rotate through the linkage part 501, and when the stator blade 20 is changed, the rotation can drive the shaft sleeve 30 to move along the axial direction of the shaft hole, so that the linkage ring 60 is driven to follow up, and the position change of the linkage ring 60 caused by the deformation of the casing 10 due to thermal expansion can be counteracted.

In this embodiment, as shown in fig. 2 and 3, the linkage part 501 is a rocker arm, and the first end and the second end of the rocker arm are respectively provided with a through hole for connection, the through hole at the first end is used for hinging with the linkage ring 60, and the through hole at the second end is sleeved on the shaft part of the stator blade 20 and used for driving the stator blade 20 to rotate. The through hole at the first end of the rocker arm is hinged with the linkage ring 60, the linkage ring 60 can drive the rocker arm to rotate, and the through hole at the second end is sleeved with the shaft part of the stator blade 20, so that the stator blade 20 can be conveniently driven to rotate.

As shown in fig. 2 and 3, a first end of the linkage part 501 is connected to the linkage ring 60 through a latch 502.

In other embodiments, the linkage 501 may be a link or other structure that can implement linkage.

Specifically, as shown in fig. 2 and 5, the outside of the sleeve 30 is provided with external threads, and the shaft hole of the casing 10 is provided with internal threads matching thereto. In the prior art, the rotation angle of the stator vane 20 is linearly related to the rotation angle of the stator vane 20, when the rotation angle of the engine is changed, the rotation angle of the stator vane 20 is also changed, when the rotation angles of the engine are v1 and v2, the rotation angles of the corresponding stator vane 20 are x1 and x2, and the following formula is adopted:

(x2-x1)/360×p＝q；

the expansion amount of the case 10 is q, and the pitch p of the thread of the nut can be calculated.

In the present embodiment, as shown in fig. 4 and 5, a placement groove 301 is provided at a connection portion of the sleeve 30 and the second end of the linkage part 501, and the second end of the linkage part 501 is provided in the placement groove 301. The linkage part 501 is connected with the shaft sleeve 30 through the placing groove 301, so that the structure is simple, and the connection is reliable.

In the present embodiment, as shown in fig. 2 and 3, a spacer 40 is provided between the second end of the linkage part 501 and the placement groove 301, and the spacer 40 is used to adjust the height H from the cassette center line 90 when the linkage part 501 is in an installed state. The height of the spacer 40 is adjusted to compensate for the deviation between the linkage 501 and the sleeve 30 due to the machining accuracy.

In other embodiments, the placement groove 301 may not be provided between the linkage part 501 and the sleeve 30, and the linkage part 501 and the sleeve 30 may be integrally formed. The integral molding omits the process of assembling the linkage part 501 and the shaft sleeve 30, and the precision of the linkage part 501 and the shaft sleeve 30 is controllable.

In the present embodiment, a guide groove (not shown) is provided at one of the connection points of the second end of the linking portion 501 and the shaft portion of the stator blade 20, and a guide portion (not shown) slidably fitted into the guide groove is provided at the other connection point. The guiding part can slide in the guiding groove, and the linkage part 501 drives the stator blade 20 to rotate and simultaneously does not drive the stator blade 20 to move along the axial direction of the shaft hole of the casing 10.

In this embodiment, the shaft portion of the stator blade 20 provides a guiding groove, the second end of the linkage portion 501 provides a guiding portion embedded in the guiding groove, the guiding groove provides a moving space for the linkage portion 501 to move along the axial direction of the shaft hole in the rotating process, the linkage portion 501 does not drive the stator blade 20 to move along the axial direction of the shaft hole, but the guiding groove and the guiding portion limit the rotational freedom degree, and the linkage portion 501 drives the stator blade 20 to rotate, so that the angle of the stator blade 20 can be changed.

In other embodiments, a guide groove may be provided by the second end of the linkage part 501, and the shaft part of the stator blade 20 may provide a protruding guide part, which is inserted into the guide groove.

In the present embodiment, the shaft portion protrudes from the shaft sleeve 30, the second end of the interlocking portion 501 is fitted over a portion of the shaft portion protruding from the shaft sleeve 30, and the second end of the interlocking portion 501 is fixed to the shaft sleeve 30 by the nut 201. The connection of the linkage part 501 and the shaft sleeve 30 is more stable and reliable.

In other embodiments, the second end of the linkage 501 may also be secured to the sleeve 30 by other fastening means.

In this embodiment, a first sealing ring 70 is disposed at a connection portion between one end of the shaft sleeve 30, which is close to the blade body of the stator blade 20, and the shaft portion, and two sides of the first sealing ring 70 are respectively abutted against the shaft sleeve and the stator blade, and the first sealing ring 70 has elasticity. The first sealing ring 70 can effectively prevent gas leakage between the stator blade 20 and the shaft sleeve 30, reduce pneumatic loss, improve the working efficiency of the gas compressor, and when the shaft sleeve 30 rotates to offset the change of different working states of the casing 10, the shaft sleeve 30 can press the first sealing ring 70, and because the first sealing ring 70 has elasticity, the first sealing ring 70 can be compressed along the axial direction of the shaft hole, when the first sealing ring 70 is compressed, the sealing tightness formed by the first sealing ring 70 is tighter, gas flow cannot leak from a gap between the stator blade 20 and the shaft sleeve 30, and the first sealing ring 70 can also restore the state before compression and always abuts against the shaft sleeve 30 and the stator blade 20.

In this embodiment, there is also provided a compressor including the compressor stator vane 20 adjustment mechanism as described above. The linkage ring 60 of the compressor is always concentric with the casing 10, so that the consistency of the rotation angles of blades is ensured, the performance of the compressor is improved, the shaft sleeve 30 is in threaded connection with the shaft hole of the casing 10, a spiral seal can be formed, the pneumatic loss is reduced, and the working efficiency of the compressor is improved.

Example 2

The technical solution of this embodiment is basically the same as that of embodiment 1, except that in this embodiment, as shown in fig. 6 and 7, a second sealing ring 80 is disposed between one end of the sleeve 30 away from the blade body of the stator blade 20 and the end face of one end of the casing 10 away from the blade body of the stator blade 20, two sides of the second sealing ring 80 are respectively abutted against the sleeve 30 and the casing 10, and the second sealing ring has elasticity. The second sealing ring 80 can effectively prevent gas leakage between the shaft sleeve 30 and the casing 10, the shaft sleeve 30 and the casing 10 are matched to form a spiral seal, sealing between the shaft sleeve 30 and the casing 10 is more reliable, the second sealing ring 80 has elasticity, the second sealing ring 80 can be compressed along the axial direction of the shaft hole, when the second sealing ring 80 is compressed, the seal formed by the second sealing ring 80 is tighter, and the second sealing ring 80 can also restore the state before compression and always abuts against the shaft sleeve 30 and the casing 10.

In fig. 7, the shaft sleeve 30 is spirally moved downwards, the first sealing ring 70 and the second sealing ring 80 are compressed, so that the sealing effect between the shaft sleeve 30 and the casing 10 and between the shaft sleeve 30 and the stator blades 20 is better, and the pneumatic loss can be reduced by matching with the spiral seal formed by the shaft sleeve 30 and the shaft hole of the casing 10, so that the working efficiency of the air compressor is further improved

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.

Claims (10)

1. The utility model provides a compressor stator blade adjustment mechanism, its characterized in that includes link ring and connecting piece, the first end of connecting piece with the link ring is connected, the second end of connecting piece is connected with the shaft part of stator blade, the link ring passes through the connecting piece drives the stator blade is rotatory, the second end of connecting piece set up in the shaft hole of receiver and with shaft hole threaded connection, the shaft part of stator blade normal running fit in the hole of the second end of connecting piece.

2. The compressor stator vane adjustment mechanism of claim 1 wherein the connecting member includes a sleeve and a linkage portion, a first end of the linkage portion being connected to the linkage ring and a second end of the linkage portion being connected to the sleeve and the shaft portion of the stator vane, respectively, the sleeve being disposed in the shaft bore and being threadably connected to the shaft bore.

3. The compressor stator vane adjustment mechanism of claim 2 wherein an end of the sleeve adjacent the linkage is provided with a slot and a second end of the linkage is disposed in the slot.

4. The compressor stator vane adjustment mechanism of claim 3 wherein a spacer is disposed between the second end of the linkage and the placement slot, the spacer being used to adjust the height of the linkage in the installed state.

5. The compressor stator vane adjustment mechanism of claim 2 wherein the linkage is integrally formed with the sleeve.

6. The compressor stator vane adjustment mechanism of claim 2 wherein the linkage is a rocker arm, the first end of the rocker arm and the second end of the rocker arm are respectively provided with a through hole for connection, the through hole of the first end of the rocker arm is used for hinging with the linkage ring, and the through hole of the second end of the rocker arm is sleeved on the shaft part of the stator vane for driving the stator vane to rotate.

7. The compressor stator vane adjusting mechanism of claim 2 wherein the shaft portion protrudes from the sleeve, the second end of the linkage portion is sleeved on the portion of the shaft portion protruding from the sleeve, and the second end of the linkage portion is secured to the sleeve by a fastening means.

8. The compressor stator vane adjustment mechanism of claim 1 wherein a guide slot is provided at a connection location of the second end of the connector with either one of the shaft portions of the stator vane, and a guide portion slidably embedded in the guide slot is provided at the other connection location.

9. The compressor stator vane adjustment mechanism of claim 1, wherein a first sealing ring is arranged at a joint of one end of the connecting piece, which is close to the vane body of the stator vane, and the shaft part, and two sides of the first sealing ring are respectively abutted against the connecting piece and the stator vane, and the first sealing ring has elasticity;

and/or a second sealing ring is arranged between the end face of the second end of the connecting piece, which is far away from the blade body of the stator blade, and the end face of the end of the casing, which is far away from the blade body of the stator blade, and two sides of the second sealing ring are respectively abutted to the connecting piece and the casing, and the second sealing ring has elasticity.

10. A compressor comprising a compressor stator vane adjustment mechanism according to any one of claims 1 to 9.