A supporting structure and assembly method of linkage ring

Abstract

The present invention provides a supporting structure and assembly method of a linkage ring, wherein the supporting structure comprises: a mounting seat, a supporting seat connected to the mounting seat by a connecting piece, and a wedge-shaped block located between the mounting seat and the supporting seat, wherein a through hole is provided on the supporting seat, one end of the connecting piece passes through the through hole and is connected to the mounting seat, a limiting portion is provided on the other end of the connecting piece, and a supporting portion is provided on the supporting seat. The assembly method comprises the following steps: sleeve the linkage ring on the compressor cylinder, and adjust the position of the linkage ring so that the rotation axis of the linkage ring coincides with the center line of the compressor cylinder; adjust the position of the wedge-shaped block so that the supporting seat is away from the mounting seat until the supporting portion abuts against the linkage ring, thereby achieving stable support for the linkage ring. The supporting structure of the linkage ring of the present invention has low machining accuracy requirements, can reduce machining costs, is easy to adjust, and can improve the convenience of assembling the linkage ring.

Description

Technical Field

[0001] The invention relates to the technical field of linkage ring assembly of a gas turbine, and in particular to a supporting structure and an assembly method of a linkage ring. Background Art

[0002] In order to prevent surge and improve the working stability and unit efficiency under variable operating conditions, the multi-stage axial flow compressor of the gas turbine often controls the gas flow and airflow angle entering the compressor by rotating one or several stator guide vanes. The adjustable stator blades are driven to rotate by the compressor stator blade actuator. The compressor stator blade actuator of the gas turbine consists of a hydraulic actuator, a linkage ring, a connecting rod, a rocker arm and other parts. During the movement, the actuator moves linearly and drives the linkage ring through the first connecting rod to rotate circumferentially in its own plane with the compressor center line as the axis. The linkage ring drives the rocker arm through the second connecting rod to rotate circumferentially with the adjustable stator blade rotation center as the axis. Among them, in order to ensure that the rotation angle of the adjustable stator blade has a unique and definite relationship with the rotation angle of the linkage ring, and the rotation angle of the entire circle of the adjustable stator blade is uniform and consistent, it is necessary to keep the linkage ring concentric with the compressor center line during the installation and operation stages.

[0003] The linkage ring is mainly aligned with the compressor centerline by means of supports distributed along the circumference of the compressor cylinder. The supports in the prior art are fixedly connected to the compressor cylinder and cannot be adjusted. It is difficult to align the rotation axis of the linkage ring with the compressor centerline during assembly, and it is difficult to further adjust it during operation and maintenance after assembly. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, a technical problem to be solved by the present invention is to provide a supporting structure of a linkage ring to facilitate the alignment of the rotation axis of the linkage ring with the center line of the compressor.

[0005] In order to solve the above technical problems, the present invention provides a supporting structure of a linkage ring, comprising: a mounting seat arranged on the outer wall of the compressor cylinder, a support seat connected to the mounting seat through a connecting member, and a wedge block located between the mounting seat and the support seat, the support seat is provided with a through hole, one end of the connecting member passes through the through hole and is connected to the mounting seat, the other end of the connecting member is provided with a limiting portion, and the support seat is provided with a supporting portion.

[0006] Preferably, a wheel groove is formed on the linkage ring, and the support portion includes a roller matched with the wheel groove.

[0007] Furthermore, an axial hole is formed on the support seat, the support portion further comprises a pin shaft passing through the axial hole, the roller is sleeved on the pin shaft, and an elastic retaining ring is provided at the end of the pin shaft.

[0008] Preferably, the support seat includes a first inclined surface, the wedge block includes a second inclined surface matching the first inclined surface, the wedge block is provided with a strip hole, the strip hole extends along the inclination direction of the second inclined surface, and one end of the connecting member passes through the strip hole.

[0009] Preferably, the supporting structure further comprises: a bracket, on which an adjusting bolt is mounted, and the adjusting bolt can lift up the linkage ring.

[0010] As described above, the supporting structure of a linkage ring of the present invention has the following beneficial effects:

[0011] By adopting the supporting structure of the linkage ring of the present invention, after the linkage ring is adjusted into place, the support seat can be moved along the connecting piece by adjusting the position of the wedge block, so as to adjust the distance of the support seat relative to the mounting seat, so that the support part can stably support the linkage ring and complete the centering assembly of the linkage ring rotation axis and the compressor center line. Compared with the prior art, the supporting structure of the linkage ring of the present invention has lower machining accuracy requirements, can reduce machining costs, is easy to adjust, and can improve the convenience of the linkage ring assembly work.

[0012] The present invention also provides an assembly method of a linkage ring using the above-mentioned support structure, comprising the following steps:

[0013] 1) Arrange multiple support structures evenly along the circumference of the outer wall of the compressor cylinder, and adjust the position of the wedge block so that the support seat is close to the mounting seat;

[0014] 2) Sleeve the linkage ring on the compressor cylinder and adjust the position of the linkage ring so that the rotation axis of the linkage ring coincides with the center line of the compressor cylinder;

[0015] 3) Adjust the position of the wedge block so that the support seat is away from the mounting seat until the support portion abuts against the linkage ring, thereby achieving stable support for the linkage ring.

[0016] Preferably, a wheel groove is formed on the linkage ring, and the support portion includes a roller matched with the wheel groove, and the step 2) further includes the following steps: embedding the roller into the wheel groove, and the roller limits the linkage ring to move axially.

[0017] Preferably, the support structure also includes a bracket, on which an adjusting bolt is installed, and the adjusting bolt can lift the linkage ring, and the step 2) also includes the following steps: lifting the linkage ring by the adjusting bolt so that the rotation axis of the linkage ring coincides with the center line of the compressor cylinder; the step 3) also includes the following steps: separating the adjusting bolt from the linkage ring.

[0018] The assembly method of a linkage ring of the present invention adopts the above-mentioned supporting structure of the linkage ring, and therefore, has the same beneficial effects as the above-mentioned supporting structure of the linkage ring, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram showing a supporting structure of a linkage ring in one embodiment of the present invention;

[0020] Figure 2 Shown is an exploded schematic diagram of a supporting structure of a linkage ring in one embodiment of the present invention;

[0021] Figure 3 A cross-sectional schematic diagram showing a supporting structure of a linkage ring in an embodiment of the present invention;

[0022] Figure 4 Shown is a schematic diagram of the assembly structure of a linkage ring in an embodiment of the present invention;

[0023] Figure 5 It is a structural schematic diagram showing a supporting structure of a linkage ring in a working state in one embodiment of the present invention.

[0024] Description of Figure Numbers

[0025] 1 Mounting Base

[0026] 2 Support seat

[0027] 210 Roller

[0028] 220 Pin

[0029] 230 Circlip

[0030] 240 Gasket

[0031] 3 Wedges

[0032] 301 Strip hole

[0033] 4 Linkage Ring

[0034] 401 wheel groove

[0035] 5 Screws

[0036] 6 Bracket

[0037] 610 Adjusting bolt

[0038] 7 Rocker arm

[0039] 8 First connecting rod

[0040] 9 Second connecting rod

[0041] 10 Hydraulic actuator DETAILED DESCRIPTION

[0042] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0043] Please refer to the attached drawings. It should be noted that the structures, proportions, sizes, etc. illustrated in the attached drawings of this specification are only used to match the contents disclosed in the specification for people familiar with the technology to understand and read, and are not used to limit the conditions under which the present invention can be implemented, so they have no substantial technical significance. Any modification of the structure, change in the proportion relationship or adjustment of the size should still fall within the scope of the technical contents disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0044] like Figure 1-5 As shown, the present invention provides a supporting structure of a linkage ring, comprising: a mounting seat 1 arranged on the outer wall of a compressor cylinder (not shown in the figure), a supporting seat 2 connected to the mounting seat 1 through a connecting piece, and a wedge block 3 located between the mounting seat 1 and the supporting seat 2, a through hole is opened on the supporting seat 2, one end of the connecting piece passes through the through hole and is connected to the mounting seat 1, a limiting portion is arranged on the other end of the connecting piece, and a supporting portion is arranged on the supporting seat 2.

[0045] By adopting the supporting structure of the linkage ring of the present invention, after the linkage ring 4 is adjusted into place, by adjusting the position of the wedge block 3, the support seat 2 can move along the connecting piece to adjust the distance of the support seat 2 relative to the mounting seat 1, so that the support part can stably support the linkage ring 4 and complete the centering assembly of the rotation axis of the linkage ring 4 and the center line of the compressor. Compared with the prior art, the supporting structure of the linkage ring of the present invention has lower machining accuracy requirements, can reduce machining costs, is easy to adjust, and can improve the convenience of assembling the linkage ring 4.

[0046] like Figure 4 As shown, as a preferred embodiment, a wheel groove 401 is provided on the linkage ring 4 in this embodiment, and the supporting portion includes a roller 210 matched with the wheel groove 401. The bottom of the wheel groove 401 is in rolling contact with the roller 210, and the side wall of the wheel groove 401 is in clearance fit with the roller 210, so that the friction force of the linkage ring 4 is smaller when it rotates relative to the compressor cylinder, and the movement of the linkage ring 4 in the axial direction can be limited.

[0047] like Figure 2As shown, specifically, the support seat 2 in this embodiment is provided with an axial hole, the support portion further includes a pin 220 passing through the axial hole, the roller 210 is sleeved on the pin 220, and an elastic retaining ring 230 is provided at the end of the pin 220. The elastic retaining ring 230 prevents the roller 210 from being displaced along the axial direction of the pin 220, thereby ensuring that the roller 210 can rotate normally. More specifically, the connecting member in this embodiment includes a screw 5, and a gasket 240 is provided between the roller 210 and the support seat 2.

[0048] As a preferred embodiment, in order to enable the wedge block 3 to be stably arranged between the mounting seat 1 and the support seat 2, the support seat 2 in this embodiment includes a first inclined surface, the wedge block 3 includes a second inclined surface matching the first inclined surface, and a strip hole 301 is opened on the wedge block 3. The strip hole 301 extends along the inclined direction of the second inclined surface, and one end of the connecting member passes through the strip hole 301. Figure 3 As shown, by adjusting the position of the wedge block 3 left and right, the wedge block 3 moves along the elongation direction of the strip hole 301, thereby adjusting the distance between the support seat 2 and the mounting seat 1. The wedge angle of the support seat 2 and the wedge block 3 in this embodiment is smaller than the friction angle of the contact surface between the two, so that self-locking can be achieved.

[0049] As a preferred embodiment, in order to more conveniently adjust the position of the linkage ring 4, the support structure in this embodiment further includes: a bracket 6 connected to the mounting seat 1, and an adjusting bolt 610 is installed on the bracket 6, and the adjusting bolt 610 can lift the linkage ring 4. Specifically, Figure 5 As shown, the adjusting bolt 610 contacts the outer ring surface of the linkage ring 4, and lifts the linkage ring 4 until the linkage ring 4 is adjusted into place, and then the position of the wedge block 3 is adjusted so that the supporting portion can stably support the linkage ring 4, and then the adjusting bolt 610 is loosened so that the roller 210 can roll in the wheel groove 401, and the linkage ring 4 can rotate relative to the compressor cylinder.

[0050] There are 10 supporting structures in this embodiment, which are evenly arranged on the circumference of the outer wall of the compressor cylinder. The linkage ring 4 in this embodiment includes an upper half and a lower half. This embodiment also provides an assembly method of the linkage ring 4 using the above-mentioned supporting structure, including the following steps:

[0051] 1) Axial positioning of the linkage ring 4. First adjust the support seat 2 to a position closer to the mounting seat 1, and then install the upper and lower halves of the linkage ring 4. Insert the roller 210 into the wheel groove 401 of the upper and lower halves, and then tighten the connecting bolts at the center plane, so that the upper and lower halves of the linkage ring 4 become a complete circle. The roller 210 contacts the side wall of the wheel groove 401. Since there are multiple support seats 2 around the outer wall of the compressor cylinder, the axial position of the linkage ring 4 is relatively fixed, but the linkage ring 4 can move within a certain range in its own plane, which is convenient for further adjusting the concentricity.

[0052] 2) Under the action of the gravity of the linkage ring 4, the position of the linkage ring 4 in its own plane can be determined by the two brackets 6. Figure 5 As shown, the concentricity between the rotation axis of the linkage ring 4 and the center line of the compressor cylinder can be adjusted by adjusting the adjusting bolt 610 on the bracket 6. During adjustment, the deflection angle of each adjustable stationary blade is measured and recorded so that the angle deviation of adjacent blades in the installed position is less than the allowable value.

[0053] 3) Adjust the height of the support seat 2. By adjusting the position of the wedge block 3, the rolling surface of the roller 210 is pressed against the bottom of the wheel groove 401 of the linkage ring 4, and the contact gap between the roller 210 and the wheel groove 401 is measured to be smaller than the allowable value. The support seats 2 are evenly distributed along the circumference of the compressor cylinder, so that the linkage ring 4 is stably supported.

[0054] 4) Loosen the adjusting bolt 610 on the bracket 6 so that the linkage ring 4 can rotate freely within the entire adjustment range of the adjustable stator blade.

[0055] like Figure 4 As shown, this embodiment also provides a compressor stator blade adjustment mechanism using the supporting structure and assembly method of the linkage ring, comprising a rocker arm 7, a first connecting rod 8, a second connecting rod 9, a linkage ring 4, a supporting structure and a hydraulic actuator 10. Its working process is as follows: the piston rod of the hydraulic actuator 10 performs linear reciprocating motion, and the linear motion is converted into the rotation of the linkage ring 4 along the compressor cylinder through the first connecting rod 8. The linkage ring 4 and the rocker arm 7 are connected by the second connecting rod 9, and the two ends of the second connecting rod 9 are ball bearings, so that the rotation of the linkage ring 4 can be converted into the rotation of the rocker arm 7, and the rocker arm 7 drives the adjustable stator blade to rotate. The rotation of the linkage ring 4 and the rocker arm 7 is a fixed-axis rotation in their own planes. The roller 210 cooperates with the wheel groove 401 of the linkage ring 4 to limit the axial movement of the linkage ring 4. By adjusting the position of the wedge block 3 to the left and right, the position of the roller 210 relative to the positioning block can be changed. Through the multiple support seats 2 distributed along the circumference of the compressor cylinder, the function of ensuring the concentricity of the rotation axis of the linkage ring 4 and the center line of the compressor cylinder is played.

[0056] The present invention uses the friction self-locking principle of the wedge block 3 to ensure the stability of the circumferential support of the linkage ring 4. At the same time, the radial height of the support structure is adjustable. The radial height is not only determined by the processing accuracy, but also has low requirements on the processing accuracy and material selection of the mounting seat 1; the radial height adjustment range of the support structure is large, the adjustment is simple, and the assembly time is saved, and the threads of the threaded holes on the mounting seat 1 connected to the connecting parts are indirectly protected; the bottom of the wheel groove 401 is in rolling contact with the roller 210, and the side wall and the roller 210 are in clearance fit, which limits the axial displacement of the linkage ring 4 and ensures the adjustment accuracy of the compressor stator adjustment mechanism; the friction between the roller 210 and the linkage ring 4 is rolling friction, the friction resistance is small, and the linkage ring 4 rotates flexibly; the roller 210, the pin 220 and the support seat 2 are fastened with an elastic retaining ring 230, the structure is simple, mature standard parts can be used, and the cost is reduced. The roller 210 is easy to disassemble and assemble, and it is convenient to replace the worn roller 210 during maintenance.

[0057] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A supporting structure of a linkage ring, characterized in that: include: A mounting seat is arranged on the outer wall of the compressor cylinder, a supporting seat connected to the mounting seat by a connecting piece, and a wedge block is located between the mounting seat and the supporting seat, the supporting seat is provided with a through hole, one end of the connecting piece passes through the through hole and is connected to the mounting seat, the other end of the connecting piece is provided with a limiting portion, and the supporting seat is provided with a supporting portion; a wheel groove is arranged on the linkage ring, and the supporting portion includes a roller matching the wheel groove; the supporting seat includes a first inclined surface, the wedge block includes a second inclined surface matching the first inclined surface, a strip hole is arranged on the wedge block, the strip hole extends along the inclined direction of the second inclined surface, and one end of the connecting piece passes through the strip hole; the wedge angle between the supporting seat and the wedge block is smaller than the friction surface angle of the contact surface between the two, so that self-locking can be achieved.

2. The supporting structure of the linkage ring according to claim 1, characterized in that: The support seat is provided with an axial hole, the support portion further comprises a pin shaft penetrating the axial hole, the roller is sleeved on the pin shaft, and an elastic retaining ring is arranged at the end of the pin shaft.

3. The supporting structure of the linkage ring according to claim 1, characterized in that: Also includes: A bracket is provided with an adjusting bolt, and the adjusting bolt can lift up the linkage ring.

4. A method for assembling a linkage ring using the support structure according to claim 1, characterized in that: The following steps are involved: 1) Arrange multiple support structures evenly along the circumference of the outer wall of the compressor cylinder, and adjust the position of the wedge block so that the support seat is close to the mounting seat; 2) Sleeve the linkage ring on the compressor cylinder and adjust the position of the linkage ring so that the rotation axis of the linkage ring coincides with the center line of the compressor cylinder; 3) Adjust the position of the wedge block so that the support seat is away from the mounting seat until the support portion abuts against the linkage ring, thereby achieving stable support for the linkage ring.

5. The method for assembling a linkage ring according to claim 4, characterized in that: The linkage ring is provided with a wheel groove, the support portion includes a roller matched with the wheel groove, and the step 2) further includes the following steps: embedding the roller into the wheel groove, and the roller limits the linkage ring to move axially.

6. The method for assembling a linkage ring according to claim 4, characterized in that: The supporting structure also includes a bracket, on which an adjusting bolt is installed, and the adjusting bolt can lift up the linkage ring. The step 2) also includes the following steps: lifting up the linkage ring by the adjusting bolt so that the rotation axis of the linkage ring coincides with the center line of the compressor cylinder; the step 3) also includes the following steps: separating the adjusting bolt from the linkage ring.

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