Circumferential limiting assembly for stationary blade ring of gas compressor

Abstract

The utility model provides a gas compressor stationary blade ring circumferential limiting assembly, a gas compressor is provided with a positioning hole, a stationary blade ring comprises a plurality of ring sections, each ring section is provided with a stationary blade ring groove, the circumferential limiting assembly comprises a locking unit and a limiting unit, the limiting unit is arranged between the positioning hole and the stationary blade ring groove in a penetrating mode, the locking unit is fixed in the positioning hole, and the limiting unit is fixed in the stationary blade ring groove. The locking unit and the limiting unit are adjacently connected to limit the radial displacement of the limiting unit, the circumferential limiting assembly further comprises a gap measuring unit, the gap measuring unit adopts an elastic sheet unit, and the elastic sheet unit is arranged in the limiting unit in a penetrating mode; the elastic sheet unit is installed in the limiting unit and attached to one side of the stationary blade ring groove. According to the utility model, by utilizing the characteristics of the first sheet and the second sheet and the structural form of the limiting unit, the measurement of a non-measurable circumferential gap is amplified into the observable gap between the two elastic sheets, so that the condition that the static blade ring groove is tightly attached to the limiting unit in an actual state can be simulated in an assembly stage.

Description

TECHNICAL FIELD

[0001] The utility model relates to heavy gas turbine field, concretely speaking, it relates to the circumferential limiting of compressor stator vane ring. BACKGROUND

[0002] In the assembly process of the stator vane ring, the circumferential gap between each ring segment is required, and the circumferential gap is controlled by circumferential limiting of each ring segment. In actual assembly, the circumferential limiting function is usually achieved by inserting a pin into the stator vane ring slot. The existing technical solution usually controls the size of the stator vane ring slot and the size of the pin limiting part, so that the size difference and the gap are small. In actual assembly, it is difficult to measure and confirm whether the stator vane ring slot is tightly attached to the pin, and only the experience of the assembly site is relied on for confirmation.

[0003] Although the existing technical solution has certain engineering application experience, whether the pin and the stator vane ring slot are tightly attached in the assembled state cannot be directly observed and measured due to space limitations, and the actual state is unknown, resulting in that the circumferential gap values of each stator vane ring segment measured after assembly may not be accurate and may not meet the design intent.

[0004] Patent CN115163209A discloses a blade set circumferential limiting system, which includes a blade set and a circumferential limiting structure. The blade set includes a plurality of circumferentially distributed blades, and the circumferential limiting structure is arranged in the circumferential gap between two adjacent blades in the blade set. When the blades in the blade set move circumferentially, the circumferential limiting structure contacts the blade surface to reduce the contact stress between the blades and the circumferential limiting structure, thereby reducing the strength requirement of the circumferential limiting structure. For similar stator vane ring structures, the above-mentioned solution cannot directly observe and measure whether the circumferential limiting structure is tightly attached to the stator vane ring slot or the blade side surface, and the measurement of the circumferential gap value of the stator vane ring segment or different stator vane groups is also not accurate.

[0005] In view of the above technical problems, the utility model is proposed. UTILITY MODEL CONTENT

[0006] The main purpose of the utility model is to provide a compressor stator vane ring circumferential limiting assembly. The limiting assembly can determine whether the limiting assembly is tightly attached to the stator vane ring slot, and can ensure the measurement accuracy of the circumferential gap value of each stator vane ring segment.

[0007] In order to achieve the above object, the utility model provides a kind of compressor stator ring circumferential limiting assembly, compressor is provided with positioning hole, stator ring includes multiple ring segments, each ring segment is provided with stator ring slot, circumferential limiting assembly includes locking unit and limiting unit, limiting unit is arranged between positioning hole and stator ring slot, locking unit is fixed in positioning hole, and locking unit is adjacent to limiting unit to limit the radial displacement of limiting unit, circumferential limiting assembly further includes gap measuring unit, gap measuring unit uses elastic sheet unit, elastic sheet unit is arranged in limiting unit;Elastic sheet unit is installed in limiting unit, and elastic sheet unit is attached to one side of stator ring slot.

[0008] The utility model further optimizes the above scheme as follows:

[0009] Further, the limiting unit includes a guide portion and a limiting portion, the guide portion passes through the compressor cylinder, the guide portion has a top surface, and the top surface is adjacent to the locking unit; the limiting portion is installed in the stator ring slot, and the limiting portion includes a limiting surface that can be tightly attached to the stator ring slot.

[0010] Further, the limiting unit further includes a mounting groove, and the mounting groove can mount the elastic sheet unit.

[0011] Further, the mounting groove is a T-shaped groove, the T-shaped groove includes a first groove and a second groove, the first groove is close to the center direction, the second groove is away from the center direction, and the first groove and the second groove form the T-shaped groove.

[0012] Further, the elastic sheet unit includes a first sheet and a second sheet, the first sheet is a straight surface, and the second sheet is an inclined surface, the first sheet is installed in the first groove, and the second sheet is installed in the second groove.

[0013] Further, the first sheet and the second sheet are integrally welded at the part of the end of the stator ring slot, and the other end is in an open state.

[0014] Further, the limiting unit further includes a positioning portion, the positioning portion is arranged on the guide portion, and the positioning portion makes the limiting surface parallel to the opening direction of the stator ring slot.

[0015] Further, the locking unit adopts a threaded locking.

[0016] Further, the locking unit includes a groove, and the groove can accommodate the upper half of the elastic sheet unit.

[0017] Further, the locking unit includes a mounting hole.

[0018] The technical scheme of the utility model at least realizes the following beneficial effects:

[0019] The characteristics of the first and second sheets and the structure of the limiting unit are used to enlarge the measurement of the unmeasurable circumferential gap into the observable gap between the elastic two sheets, so that the close contact between the vane ring groove and the limiting unit in the actual state can be simulated in the assembly stage. BRIEF DESCRIPTION OF DRAWINGS

[0020] The drawings constituting a part of the specification of the present utility model are used to provide further understanding of the present utility model, and the illustrative embodiments of the present utility model and the explanation thereof are used to explain the present utility model, and do not constitute improper limitation on the present utility model. In the drawings:

[0021] Figure 1 A front view of the vane ring is shown;

[0022] Figure 2 An axonometric view of the vane ring is shown;

[0023] Figure 3 A state before the circumferential limiting assembly is limited is shown;

[0024] Figure 4 A local enlarged view of the state before the circumferential limiting assembly is limited is shown;

[0025] Figure 5 A state after the circumferential limiting assembly is limited is shown;

[0026] Figure 6 A three-dimensional schematic view of the assembly of the limiting unit and the elastic sheet unit is shown;

[0027] Figure 7 A top view of the assembly of the limiting unit and the elastic sheet unit is shown;

[0028] Figure 8 A three-dimensional schematic view of the locking unit is shown;

[0029] Figure 9 A three-dimensional schematic view of the locking unit from another angle is shown;

[0030] Figure 10 A three-dimensional schematic view of the limiting unit is shown;

[0031] Among the above drawings, the following reference signs are included:

[0032] 1, T-shaped groove; 2, elastic sheet unit; 3, first sheet; 4, second sheet; 5, vane ring; 6, locking unit; 7, limiting unit; 8, first groove; 9, second groove; 10, vane ring groove; 11, mounting hole; 12, vane ring side surface; 13, compressor cylinder; 14, positioning hole; 15, recess;

[0033] 71, guide portion; 72, limiting portion; 73, top surface; 74, limiting surface; 75, positioning portion.

[0034] A, a circumferential gap. DETAILED DESCRIPTION

[0035] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0036] The present application will be further described in detail below in combination with specific embodiments, which cannot be understood as limiting the scope of the present application. The term "comprising" indicates the presence of a feature, but does not exclude the presence or addition of one or more other features; the terms "lateral", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application; in addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0037] In the description, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more.

[0038] The compressor blades of the gas turbine include a row of moving blades and a row of stationary blades. The row of stationary blades is usually segmented and mounted in the stationary blade ring 5, and then mounted in the cylinder through the stationary blade ring 5. As shown in Figures 1-2 In the assembly process of the stationary blade ring 5, the circumferential gap A between the stationary blade ring side surfaces 12 of each ring segment is usually required. If the gap A between the stationary blade ring side surfaces 12 is too large, it will affect the aerodynamic performance of the gas turbine; if the gap between the stationary blade ring side surfaces 12 is too small, a large stress will be generated during the operation of the gas turbine due to thermal expansion. Therefore, it is necessary to ensure that the circumferential gap A between each stationary blade ring segment measured in the assembled state is consistent with the actual working state, so that the gap between the stationary blade ring side surfaces 12 is in a reasonable state.

[0039] In the assembly process, when measuring the circumferential gap A of each ring segment, it is necessary to ensure that the stator ring groove 10 has been tightly attached to the limiting unit 7, so as to ensure that the circumferential gap value A measured in the assembly state is consistent with the actual circumferential gap value A in the working state, and consistent with the design intention. The circumferential limiting assembly of the utility model can directly observe whether the elastic sheet unit 2 is tightly attached through the positioning hole 14 of the compressor cylinder, and can be measured using a plug gauge and other tools, so as to determine whether the stator ring groove 10 and the limiting unit 7 are tightly attached.

[0040] As shown in Figures 3-5 A circumferential limiting assembly of a compressor stator ring 5, the compressor is provided with a positioning hole 14, the stator ring 5 comprises a plurality of ring segments, each ring segment is provided with a stator ring groove 10, the circumferential limiting assembly comprises a locking unit 6 and a limiting unit 7, the limiting unit 7 is arranged between the positioning hole 14 and the stator ring groove 10, the locking unit 6 is fixed in the positioning hole 14, and the locking unit 6 is adjacent to the limiting unit 7 to limit the radial displacement of the limiting unit 7.

[0041] The circumferential limiting assembly further comprises a gap measuring unit, and the gap measuring unit is in the form of an elastic sheet unit 2. The elastic sheet unit 2 is arranged in the limiting unit 7; the elastic sheet unit 2 is installed in the limiting unit 7, and the elastic sheet unit 2 is attached to one side of the stator ring groove 10.

[0042] The limiting unit 7 comprises a guide portion 71 and a limiting portion 72, the guide portion 71 passes through the compressor cylinder body 13, and the guide portion 71 has a top surface 73, the top surface 73 is adjacent to the locking unit 6. The limiting portion 72 is arranged in the stator ring groove 10, and the limiting portion 72 comprises a limiting surface 74, the limiting surface 74 can be tightly attached to the stator ring groove 10. The locking unit 6 is locked by threads. The locking unit 6 comprises a recess 15, and the recess 15 can accommodate the upper half of the elastic sheet unit 2. The locking unit 6 comprises a mounting hole 11, and the locking unit 6 can be screwed into the positioning hole 14 of the compressor cylinder body 13 through the mounting hole 11.

[0043] The limiting unit 7 further comprises a mounting groove, and the mounting groove can mount the elastic sheet unit 2. The mounting groove is a T-shaped groove 1, and the T-shaped groove 1 comprises a first groove 8 and a second groove 9, the first groove 8 is close to the center direction, the second groove 9 is away from the center direction, and the first groove 8 and the second groove 9 form the T-shaped groove 1.

[0044] Preferably, the limiting unit 7 further comprises a positioning portion 75, the positioning portion 75 is arranged on the guide portion 71, and the positioning portion 75 makes the limiting surface 74 parallel to the opening direction of the stator ring groove 10.

[0045] The elastic sheet unit 2 comprises a first sheet 3 and a second sheet 4, wherein the first sheet 3 is a straight face and is installed in the first groove 8; the second sheet 4 is an inclined face and is installed in the second groove 9. The first sheet 3 and the second sheet 4 constitute the elastic sheet unit 2. The first sheet 3 and the second sheet 4 need to be welded by wider and harder and narrower and elastic sheets to achieve the effect similar to a forceps. The thickness of the first sheet 3 and the second sheet 4 needs to be less than or equal to the thickness of the T-shaped groove of the limiting unit 7, that is, the thickness of the first sheet 3 and the second sheet 4 needs to be less than the thickness of the first groove 8 and the second groove 9.

[0046] The first sheet 3 and the second sheet 4 can be connected into one body by local welding, specifically, the first sheet 3 and the second sheet 4 are welded into one body at the part of the one end of the vane ring groove 10, and the other end is in an open state, so that the gap between the vane ring groove 10 and the limiting unit 7 is enlarged, and the first sheet 3 and the second sheet 4 can be compressed and closely attached with the rotation of the vane ring 5.

[0047] Figures 1-2 Each segment of the vane ring 5 is implemented in the above-mentioned circumferential limiting assembly. By using the characteristics of the elastic sheets of the first sheet 3 and the second sheet 4 and the structure of the limiting unit 7, the measurement of the unmeasurable circumferential gap A is enlarged to the gap between the elastic two sheets which can be observed, so that the closely attached condition of the vane ring groove 10 and the limiting unit 7 in the actual state can be simulated in the assembly stage to obtain the accurate circumferential gap A between the segments of the vane ring 5.

[0048] When the circumferential gap A of the compressor vane ring 5 is measured by using the circumferential limiting assembly, the elastic sheet unit 2 needs to be put into the T-shaped groove of the limiting unit 7 and attached to the lowermost end. The combined limiting unit 7 is inserted into the positioning hole 14 on the compressor cylinder 13, and the limiting part 72 of the limiting unit 7 slides along the guide groove of the positioning hole 14 of the compressor cylinder to ensure that the actual limiting face 74 of the limiting unit 7 is placed along the circumference. At this time, the limiting part 72 of the limiting unit 7 is located in the vane ring groove 10.

[0049] Then, the vane ring 5 is rotated along the circumference, the vane ring side face 12 is closely attached with the elastic sheet part of the elastic sheet unit 2 and continues to move until the vane ring groove 10 is closely attached with the limiting face 74 of the limiting unit 7. At this time, it can be observed from the positioning hole 14 of the compressor cylinder that the two sheets of the elastic sheet unit 2 have been closely attached, and a plug gauge or other tools can be used for measurement verification. When the two sheets are verified to be closely attached, it can be determined that the vane ring groove 10 is closely attached with the limiting unit 7, and at this time, the circumferential gap value A between the segments of the vane ring 5 can be measured.

[0050] When the vane ring groove 10 is in close contact with the limiting unit 7, the locking unit 6 is screwed into the positioning hole 14 of the compressor cylinder along the radial direction. The space in the groove 15 of the locking unit 6 can accommodate the upper end portion of the elastic sheet unit 2, and the lower end surface of the large screw is in close contact with the upper end surface of the limiting unit 7, so as to prevent the limiting unit 7 from moving radially, thereby achieving radial limiting.

[0051] In summary, from the above description, it can be seen that the above-mentioned embodiments of the utility model realize the following technical effects:

[0052] 1. The characteristics of the first sheet and the second sheet and the structure of the limiting unit are used to enlarge the unmeasurable circumferential gap into the observable gap between the two elastic sheets, so as to ensure that the close contact between the vane ring groove and the limiting unit under the actual state can be simulated during the assembly stage.

[0053] The above only describes the preferred embodiments of the utility model and is not used to limit the utility model. For those skilled in the art, the utility model can have various changes and variations. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A circumferential limiting assembly of a compressor stator vane ring, the compressor being provided with a positioning hole (14), the stator vane ring comprising a plurality of ring segments, each of the ring segments being provided with a stator vane groove (10), the circumferential limiting assembly comprising a locking unit (6) and a limiting unit (7), the limiting unit (7) being arranged between the positioning hole (14) and the stator vane groove (10), the locking unit (6) being fixed in the positioning hole (14), and the locking unit (6) being in abutment with the limiting unit (7) to limit the radial displacement of the limiting unit (7), the gap measuring unit employing an elastic sheet unit (2), the elastic sheet unit (2) being arranged in the limiting unit (7), the elastic sheet unit (2) being mounted in the limiting unit (7), and the elastic sheet unit (2) being in abutment with one side of the stator vane groove (10). The circumferential limiting assembly further comprises a gap measuring unit, characterized in that: The limiting unit (7) comprises a guide portion (71) and a limiting portion (72), the guide portion (71) penetrating through the compressor cylinder, the guide portion (71) having a top surface (73) in abutment with the locking unit (6).

2. The circumferential limit assembly of claim 1, wherein: The limiting portion (72) is arranged in the stator vane groove (10), the limiting portion (72) comprising a limiting surface (74) in abutment with the stator vane groove (10). The limiting unit (7) further comprises a mounting groove for mounting the elastic sheet unit (2).

3. The circumferential limit assembly of claim 2, wherein: The mounting groove is a T-shaped groove (1), the T-shaped groove (1) comprising a first groove (8) and a second groove (9), the first groove (8) being close to the center direction, the second groove (9) being away from the center direction, and the first groove (8) and the second groove (9) forming the T-shaped groove (1).

4. The circumferential limit assembly of claim 3, wherein: The elastic sheet unit (2) comprises a first sheet (3) and a second sheet (4), the first sheet (3) being a straight surface, and the second sheet (4) being an inclined surface, the first sheet (3) being mounted in the first groove (8), and the second sheet (4) being mounted in the second groove (9).

5. The circumferential limit assembly of claim 4, wherein: The first sheet (3) and the second sheet (4) are integrally welded at the portion penetrating into one end of the stator vane groove (10), and the other end is in an open state.

6. The circumferential limit assembly of claim 5, wherein: The limiting unit (7) further comprises a positioning portion (75) arranged on the guide portion (71), the positioning portion (75) making the limiting surface (74) parallel to the opening direction of the stator vane groove (10).

7. The circumferential limit assembly of claim 6, wherein: The locking unit (6) employs a threaded locking.

8. The circumferential limit assembly of claim 7, wherein: The locking unit (6) comprises a recess (15) capable of accommodating the upper half of the elastic sheet unit (2).

9. The circumferential limit assembly of claim 8, wherein: The locking unit (6) comprises a mounting hole (11).

10. The circumferential limit assembly of claim 9, wherein: ​

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