Gland ring machining tooling

Abstract

The utility model relates to steam seal circle machining frock, including the bottom disc of circular, the side of bottom disc is provided with 6 groups of support block, support block and bottom disc are along the radial sliding fit of bottom disc, and every support block is connected with bottom disc through the positioning member, be provided with arc body positioning mechanism on every support block, be provided with detachable reference sleeve on the bottom disc, reference sleeve is with bottom disc coaxial, the outer diameter of reference sleeve and the arc body inner diameter of steam seal circle adaptation, 6 groups of support block even distribution around reference sleeve. When positioning, first will every arc body be fixed on the support block, then push support block and move to reference sleeve, when the inner wall of arc body contacts reference sleeve outer wall, use positioning member and fix support block. After 6 arc bodies all adhere to reference sleeve, just splice into the steam seal circle of circular ring, can detach reference sleeve, and process steam seal circle. When adjusting arc body radial position, can adjust in place once, need not adjust many times, and can guarantee the position accuracy of arc body.

Description

Technical Field

[0001] This utility model belongs to the field of steam seal ring processing equipment, and in particular, a steam seal ring processing tooling. Background Technology

[0002] Steam seal rings are sealing components of steam turbines. Their core function is to minimize steam (or gas) leakage from high-pressure areas to low-pressure areas, thereby improving unit efficiency and ensuring safe and stable operation. To facilitate installation into the turbine's steam seal body, steam seal rings are typically cut into six arc segments. While it's possible to machine the entire steam seal ring before cutting and assembling, this method results in larger gaps between the arc segments. Therefore, currently, the preferred method is to first cut the blank into six arc segments, then precision machine the end faces and sides of each arc segment, and finally splice the six segments together and precision machine the inner and outer circles. To ensure a tight and stable assembly of the six arc segments into a circular steam seal ring during precision machining, specialized tooling is required for alignment and clamping.

[0003] CN201320458798.5 discloses a machining fixture for steam turbine seal rings, which uses radial adjusting blocks to support each arc body and locks the seal ring with set screws. The radial adjusting blocks are manually adjusted, which has low precision and requires multiple adjustments to bring the radial adjusting blocks and arc bodies to the appropriate positions, resulting in low efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a tooling for processing steam seal rings, which can improve clamping efficiency.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows: a gas seal ring processing fixture, including a circular chassis, with 6 sets of support blocks arranged on the side of the chassis. The support blocks are slidably engaged with the chassis along the radial direction of the chassis, and each support block is connected to the chassis through a positioning component; each support block is provided with an arc positioning mechanism.

[0006] A detachable reference sleeve is provided on the chassis. The reference sleeve is coaxial with the chassis, and the outer diameter of the reference sleeve is adapted to the inner diameter of the arc of the steam seal ring. Six sets of support blocks are evenly distributed around the reference sleeve.

[0007] Furthermore, a connecting plate is fixedly provided at the end of the reference sleeve. The connecting plate is perpendicular to the reference sleeve and is connected to the chassis by multiple screws.

[0008] Furthermore, the arc positioning mechanism includes a first support step and a second support step, the first support step and the second support step are located on the side wall of the support block facing the reference sleeve, and the second support step is located below the first support step; a positioning through hole is provided on the side wall of the support block above the first support step, the length direction of the positioning through hole is consistent with the radial direction of the chassis, and a first locking screw is provided in the positioning through hole.

[0009] Furthermore, the chassis is provided with 6 sets of radially extending adjustment grooves, and the bottom of each support block is located in an adjustment groove and slides in cooperation with the adjustment groove.

[0010] Furthermore, the adjusting groove is a dovetail groove.

[0011] Furthermore, a locking hole is provided at the bottom of the adjusting groove, and the positioning element is a second locking screw, which passes through the locking hole and is threadedly engaged with the support block.

[0012] The beneficial effects of this utility model are: In this utility model, each set of support blocks is used to position a section of arc body. Each support block slides and cooperates with the chassis along the radial direction of the chassis, and the radial position of the support block can be flexibly adjusted, thereby positioning arc bodies with various inner and outer diameters.

[0013] During positioning, first fix each arc segment to the support block, then push the support block towards the reference sleeve. When the inner wall of the arc segment contacts the outer wall of the reference sleeve, it indicates that the arc segment is in the appropriate radial position. At this point, the support block can be fixed using positioning components, and the arc segment will also remain fixed. After all six arc segments are fully fitted to the reference sleeve, they will form a circular steam seal ring. The reference sleeve can then be removed, and the steam seal ring can be processed.

[0014] As can be seen, when adjusting the radial position of the arc, it can be adjusted to the correct position in one go, without the need for multiple adjustments, and the positional accuracy of the arc can be guaranteed. Attached Figure Description

[0015] Figure 1 This is a top view of the present invention;

[0016] Figure 2 yes Figure 1 Schematic diagram of the AA section;

[0017] Figure 3 yes Figure 1 Schematic diagram of the BB section;

[0018] Figure 4 This is a schematic diagram showing the steam seal ring after clamping.

[0019] Reference numerals: 1—chassis; 2—support block; 3—positioning element; 4—reference sleeve; 5—connecting plate; 7—first support step; 8—second support step; 9—positioning through hole; 10—first locking screw; 11—adjustment groove. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] The tooling for machining the gas seal ring of this utility model, such as Figures 1 to 4 As shown, the system includes a circular chassis 1, made of metal, such as stainless steel, with a thickness of approximately 70mm. The positioning disc 1 is circular, allowing it to be directly clamped by a lathe's three-jaw or four-jaw chuck. Six sets of support blocks 2 are provided on the side of the chassis 1. These support blocks 2 slide radially with the chassis 1, and each support block 2 is connected to the chassis 1 via a positioning element 3. The support blocks 2 are used to position the arc-shaped components that make up the steam seal ring. Each set of support blocks 2 consists of two blocks, ensuring stable clamping of the arc-shaped components. The support blocks 2 can be slidable to adjust their radial position, facilitating the positioning of steam seal rings of various diameters. The positioning element 3 is used to fix the support blocks 2. When a support block 2 moves to the target position, the positioning element 3 locks it in place to prevent further movement. Each support block 2 is equipped with an arc-shaped positioning mechanism for positioning the arc-shaped components.

[0022] A detachable reference sleeve 4 is mounted on the chassis 1. The reference sleeve 4 is a circular cylinder, which can be made of metal with a thickness of 3-5mm. Its outer wall is precision machined to achieve high dimensional accuracy. The reference sleeve 4 is coaxial with the chassis 1, and its outer diameter matches the inner diameter of the arc of the steam seal ring. Six sets of support blocks 2 are evenly distributed around the reference sleeve 4.

[0023] After the six arc segments are assembled into a steam seal ring and clamped onto the support block 2, the steam seal ring should be coaxial with the chassis 1. This invention utilizes a detachable reference sleeve 4 on the chassis 1. When clamping the arc segments, the six segments are first positioned onto the six sets of support blocks 2 using an arc segment positioning mechanism. Then, the support blocks 2 are moved towards the reference sleeve 4 until the inner wall of the arc segment is flush with the outer wall of the reference sleeve 4. Since the outer diameter of the reference sleeve 4 is the same as the inner diameter of the arc segment, and the reference sleeve 4 is coaxial with the chassis 1, when the inner wall of the arc segment is flush with the outer wall of the reference sleeve 4, the arc segment should also be coaxial with the chassis 1, and the radial position of the arc segment should be precisely aligned to form the steam seal ring. After the inner walls of all six arc segments are flush with the outer wall of the reference sleeve 4, the reference sleeve 4 can be removed to facilitate machining of the inner circle of the steam seal ring.

[0024] As can be seen, the reference sleeve 4 serves as a positioning reference, enabling the arc body to be accurately moved to the target position in one go, thus improving clamping efficiency. Furthermore, after the inner walls of all six arc body segments have contacted the outer wall of the reference sleeve 4, it is possible to observe whether the arc body and the reference sleeve 4 are in close contact, and simultaneously observe whether the end faces of adjacent arc bodies are fully in contact, thereby determining whether the dimensional accuracy of each arc body segment meets the requirements.

[0025] To facilitate the assembly and disassembly of the reference sleeve 4, a connecting plate 5 is fixedly installed at the end of the reference sleeve 4. The connecting plate 5 is perpendicular to the reference sleeve 4 and is connected to the base plate 1 by multiple screws. The connecting plate 5 is located on the inner wall of the reference sleeve 4 and is annular in shape. The connecting plate 5 has multiple through holes, and the base plate 1 has multiple threaded holes corresponding to the through holes. When installing the reference sleeve 4, the through holes are aligned with the threaded holes, and the screws are passed through the through holes and engaged with the threaded holes.

[0026] The arc-shaped positioning mechanism can consist of multiple pressure plates that press and fix the sides of the arc-shaped body. Since the outer circumference of the arc-shaped body is pre-machined with threaded holes, in a preferred embodiment, the arc-shaped positioning mechanism includes a first support step 7 and a second support step 8. The first and second support steps 7 and 8 are perpendicular to the axial direction of the chassis 1. The first and second support steps 7 and 8 are located on the side wall of the support block 2 facing the reference sleeve 4, with the second support step 8 located below the first support step 7. A positioning through hole 9 is provided on the side wall of the support block 2 above the first support step 7. The length direction of the positioning through hole 9 is consistent with the radial direction of the chassis 1, and a first locking screw 10 is installed inside the positioning through hole 9. The positional relationship between the first support step 7 and the second support step 8 is adapted to the stepped side wall shape of the steam seal ring, ensuring that the side of the steam seal ring can be supported by the first and second support steps 7 and 8. Figure 4 As shown. The first locking screw 10 passes through the positioning through hole 9 and mates with the threaded hole on the outer circle of the arc body, thereby tightening and fixing the arc body.

[0027] The chassis 1 is provided with 6 sets of radially extending adjustment grooves 11. The bottom of each support block 2 is located in an adjustment groove 11 and slides in cooperation with the adjustment groove 11. The adjustment groove 11 is preferably a dovetail groove. The bottom of the support block 2 is also dovetail shaped, which can guide the support block 2 and play a certain role in improving the stability of the support block 2.

[0028] The bottom of the adjusting groove 11 is provided with a locking hole, and the positioning element 3 is a second locking screw. The second locking screw passes through the locking hole and is threadedly engaged with the support block 2. The second locking screw is clearance-fitted with the locking hole. When the support block 2 slides, the second locking screw can slide along the locking hole. When the support block 2 slides to the target position, the second locking screw is rotated to tighten and fix the support block 2.

[0029] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A tooling for processing steam seal rings, comprising a circular chassis (1), wherein six sets of support blocks (2) are provided on the side of the chassis (1), the support blocks (2) slidingly engaging with the chassis (1) radially, and each support block (2) being connected to the chassis (1) via a positioning element (3); each support block (2) is provided with an arc-shaped positioning mechanism; characterized in that: A detachable reference sleeve (4) is provided on the chassis (1). The reference sleeve (4) is coaxial with the chassis (1). The outer diameter of the reference sleeve (4) is adapted to the inner diameter of the arc of the steam seal ring. Six sets of support blocks (2) are evenly distributed around the reference sleeve (4).

2. The machining fixture for the gas seal ring as described in claim 1, characterized in that: A connecting plate (5) is fixedly provided at the end of the reference sleeve (4). The connecting plate (5) is perpendicular to the reference sleeve (4) and is connected to the chassis (1) by multiple screws.

3. The machining fixture for the gas seal ring as described in claim 1, characterized in that: The arc positioning mechanism includes a first support step (7) and a second support step (8). The first support step (7) and the second support step (8) are located on the side wall of the support block (2) facing the reference sleeve (4), and the second support step (8) is located below the first support step (7). A positioning through hole (9) is provided on the side wall of the support block (2) above the first support step (7). The length direction of the positioning through hole (9) is consistent with the radial direction of the chassis (1). A first locking screw (10) is provided in the positioning through hole (9).

4. The machining fixture for the gas seal ring as described in claim 1, characterized in that: The chassis (1) is provided with 6 sets of radially extending adjustment grooves (11), and the bottom of each support block (2) is located in an adjustment groove (11) and slides in cooperation with the adjustment groove (11).

5. The machining fixture for the gas seal ring as described in claim 4, characterized in that: The adjusting groove (11) is a dovetail groove.

6. The machining fixture for the gas seal ring as described in claim 4, characterized in that: The bottom of the adjusting groove (11) is provided with a locking hole, and the positioning element (3) is a second locking screw. The second locking screw passes through the locking hole and is threadedly engaged with the support block (2).

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