Positioning device and positioning method for inserted tooth steam sealing ring of steam turbine

Abstract

The invention discloses a positioning device and a positioning method for a steam turbine inserted steam sealing ring with non-uniformly distributed back arc spring holes, and belongs to the technical field of steam turbines.The positioning device comprises a positioning disc, a plurality of positioning holes are formed in the positioning disc and distributed in the circumferential direction of a multi-arc-section combined type annular workpiece, and the back arc spring holes are distributed in the positioning disc; the connecting holes are in one-to-one correspondence with a plurality of connecting holes formed in the multi-arc-section combined type annular workpiece; the multiple positioning columns are connected with the multiple positioning holes in a one-to-one correspondence mode, and each positioning column is provided with a positioning face and a positioning groove; the length of the adjusting mechanism is adjustable, and by rotating the positioning columns, the two ends of the adjusting mechanism can extend into the positioning grooves in any set of two positioning columns oppositely arranged in the radial direction, so that the connecting holes in the multi-arc-section combined type annular workpiece are aligned with the positioning grooves in the corresponding positioning columns in the radial direction, and meanwhile, the adjusting mechanism can adjust the length of the adjusting mechanism. The positioning faces on the corresponding positioning columns are attached to the corresponding arc sections in the multi-arc-section combined annular workpiece.

Description

Technical Field

[0001] This application belongs to the technical field of steam turbines, and particularly relates to a positioning device and a positioning method for a tooth-inserted steam seal ring of a steam turbine. Background Technique

[0002] In the production process of the tooth-inserted steam seal ring of a steam turbine, to ensure that each steam seal tooth can be firmly embedded in the steam seal ring, the entire steam seal ring is first evenly divided into several arc segments. Then, the steam seal teeth are inserted into the corresponding arc segments and fixed by caulking to form the arc segments of the tooth-inserted steam seal ring. Finally, multiple such arc segments are combined into a complete tooth-inserted steam seal ring. Since a machining allowance of 0.2 - 0.4 mm is reserved for the steam seal teeth of the entire tooth-inserted steam seal ring, when assembling multiple arc segments of the tooth-inserted steam seal ring into the tooth-inserted steam seal ring, precise positioning and fixing of these arc segments are required, and then the final machining of the steam seal teeth on the entire tooth-inserted steam seal ring is completed.

[0003] The existing positioning device for the tooth-inserted steam seal ring of a steam turbine mainly consists of a faceplate with a full-circle equally divided T-slot and a positioning and adjusting block fixed on the faceplate. During specific operation, taking the back arc of the steam seal ring as the positioning reference, using the spring holes on the back arc of the steam seal ring, it is tightened and fixed to the positioning and adjusting block through screws. However, the versatility of this positioning device for the tooth-inserted steam seal ring of a steam turbine is extremely poor and it is difficult to meet diverse production requirements. It is only applicable to steam seal rings with evenly distributed spring holes on the back arc of the full-circle steam seal ring and for batch production. Once encountering a steam seal ring with unevenly distributed back arc spring holes, the pre-made full-circle equally divided T-slot faceplate cannot achieve precise turning positioning of the steam seal ring. At this time, if positioning is to be completed, a T-slot faceplate with a specific angle or a positioning and adjusting block with a specific angle has to be customized separately. This will undoubtedly greatly increase the tooling cost and extend the production cycle. Summary of the Invention

[0004] In view of this, this application provides a positioning device and a positioning method for a tooth-inserted steam seal ring of a steam turbine with unevenly distributed back arc spring holes.

[0005] To achieve the above object, this application mainly provides the following technical solutions:

[0006] On the one hand, this application provides a positioning device for a tooth-inserted steam seal ring of a steam turbine, including:

[0007] A positioning disk, on which a plurality of positioning holes are opened, the plurality of positioning holes are distributed along the circumferential direction of a multi-arc-segment combined annular workpiece, and correspond one-to-one to a plurality of connection holes provided on the multi-arc-segment combined annular workpiece;

[0008] A plurality of positioning posts, the plurality of positioning posts are respectively connected to the plurality of positioning holes one-to-one, and each positioning post is provided with a positioning surface and a positioning groove;

[0009] An adjustment mechanism, wherein the length of the adjustment mechanism is adjustable. By rotating the positioning column, the two ends of the adjustment mechanism can respectively extend into the positioning grooves on any group of two positioning columns that are relatively arranged in the radial direction, so that the connecting holes on the multi-arc-segment combined annular workpiece are aligned with the positioning grooves on the corresponding positioning columns in the radial direction. At the same time, the positioning surfaces on the corresponding positioning columns are fitted with the corresponding arc segments in the multi-arc-segment combined annular workpiece.

[0010] Optionally, the positioning device for the turbine insert seal ring further comprises:

[0011] A fastening element, one end of which abuts against a side of the positioning column away from the multi-arc segment combined annular workpiece, and the other end passes through the positioning groove on the positioning column and is inserted into the connecting hole of the multi-arc segment combined annular workpiece.

[0012] Optionally, the positioning device for the turbine insert seal ring further comprises:

[0013] A washer assembly is arranged between the fastening element and a side of the positioning column away from the multi-arc segment combined annular workpiece.

[0014] Optionally, the gasket assembly comprises:

[0015] A flat washer, the flat washer being arranged close to the positioning column;

[0016] A spring washer is arranged between the flat washer and the head of the fastening element.

[0017] Optionally, an abutment surface is provided on a side of the positioning column opposite to the positioning surface, and the abutment surface is a vertical surface, and the vertical surface is used to cooperate with the fastening element.

[0018] Optionally, at least a portion of the positioning surface is a curved surface structure, and a radius of curvature of the curved surface structure is equal to a radius of curvature of a corresponding arc segment of the multi-arc segment combined annular workpiece.

[0019] Optionally, at least a portion of the positioning surface is a planar structure, and the planar structure is used to support corresponding arc segments in the multi-arc segment combined annular workpiece.

[0020] Optionally, the adjustment mechanism includes:

[0021] Stud rods, screw sleeves and dowel heads;

[0022] The screw sleeve is sleeved on the stud rod and is threadedly connected with the stud rod;

[0023] The positioning heads are respectively arranged at two opposite ends of the stud rod and the screw sleeve, and the positioning heads can be embedded into the positioning grooves on two positioning columns arranged oppositely in the radial direction.

[0024] On the other hand, the present application provides a positioning method for a toothed steam seal ring of a steam turbine, which is applied to the positioning device for the toothed steam seal ring of a steam turbine described in any one of the above, and the method includes:

[0025] A plurality of positioning holes are formed in the positioning disk, and the plurality of positioning holes are in one-to-one correspondence with a plurality of connecting holes arranged on the multi-arc segment combined annular workpiece;

[0026] Rotatable positioning columns are installed at each positioning hole;

[0027] The positioning columns are rotated in groups and the length of the adjusting mechanism is controlled, so that both ends of the adjusting mechanism respectively extend into the positioning grooves of two positioning columns in the corresponding group. After each operation of aligning the connecting holes on the multi-arc segment combined annular workpiece with the positioning grooves on the corresponding positioning columns in the radial direction is completed, the positioning columns in the corresponding group are fixed;

[0028] Each arc segment of the multi-arc segment combined annular workpiece is fixed to the corresponding positioning column one by one.

[0029] Optionally, before each arc segment of the multi-arc segment combined annular workpiece is fixed to the corresponding positioning column one by one, it further includes:

[0030] Machining the positioning surface on the positioning column according to the outer diameter dimension of the multi-arc segment combined annular workpiece.

[0031] By means of the above technical solution, the present application has at least the following beneficial effects:

[0032] In the embodiments of the present application, the positioning device and the positioning method for the turbine inserted-tooth gland packing ring are provided. By opening a series of positioning holes corresponding one by one to the connection holes on the multi-arc segment combined annular workpiece along the circumferential direction of the positioning disk, the positioning columns installed at the positioning holes of the positioning disk can be arranged completely according to the actual distribution of the connection holes on the multi-arc segment combined annular workpiece, providing a prerequisite for the positioning slots on the positioning columns to be accurately aligned with the connection holes on the corresponding arc segments of the multi-arc segment combined annular workpiece in the radial direction during subsequent positioning operations. Thus, the versatility and adaptability of the positioning device for the turbine inserted-tooth gland packing ring are improved. No matter facing a multi-arc segment combined annular workpiece with evenly distributed or complex and variable connection holes, it can be easily handled, effectively meeting the diverse production requirements and providing a strong guarantee for efficient and accurate positioning during the production process. Further, by rotating the positioning columns and adjusting the adjustment mechanism, the positioning slots on the positioning columns can be aligned with the connection holes on the corresponding arc segments of the multi-arc segment combined annular workpiece. The operation is relatively simple, without a complex installation and adjustment process, and there is no need to separately customize complex tooling for different workpieces, reducing the operation difficulty and tooling cost and improving the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 FIG. is a schematic structural diagram of the adjustment mechanism in a working state according to an alternative embodiment of the present application;

[0034] Figure 2 FIG. is a schematic view of one perspective of the positioning column according to an alternative embodiment of the present application;

[0035] Figure 3 FIG. is a schematic view of another perspective of the positioning column according to an alternative embodiment of the present application;

[0036] Figure 4 FIG. is an exploded view of the adjustment mechanism according to an alternative embodiment of the present application;

[0037] Figure 5 FIG. is a schematic structural diagram of the positioning device for the turbine inserted-tooth gland packing ring in a working state according to an alternative embodiment of the present application;

[0038] Figure 6 FIG. is a flowchart of the positioning method for the turbine inserted-tooth gland packing ring according to an alternative embodiment of the present application.

[0039] The reference numerals are shown as:

[0040] 1. Locating plate; 11. Locating hole; 2. Locating post; 21. Locating surface; 211. Curved surface structure; 212. Plane structure; 22. Locating groove; 23. Abutting surface; 3. Adjusting mechanism; 31. Stud rod; 32. Screw rod sleeve; 33. Locating head; 4. Fastening element; 5. Washer assembly; 6. Multi-arc segment combined annular workpiece. Detailed implementation manner

[0041] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0042] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0043] In the present application, unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected to", "fixed" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0044] The following describes the preferred embodiments of the present application with reference to the drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application and are not used to limit the present application.

[0045] See in combination Figures 1 to 5As shown, according to an embodiment of the present application, a positioning device for a turbine inserted-tooth gland ring is provided, including: a positioning disk 1, on which a plurality of positioning holes 11 are formed. The plurality of positioning holes 11 are distributed along the circumferential direction of a multi-arc combined annular workpiece 6 and correspond one-to-one to a plurality of connection holes provided on the multi-arc combined annular workpiece 6; a plurality of positioning columns 2, which are respectively connected to the plurality of positioning holes 11 one-to-one, and each positioning column 2 is provided with a positioning surface 21 and a positioning groove 22; an adjustment mechanism 3, the length of the adjustment mechanism 3 is adjustable. By rotating the positioning column 2, both ends of the adjustment mechanism 3 can respectively extend into the positioning grooves 22 on any two radially opposite positioning columns 2, so that the connection holes on the multi-arc combined annular workpiece 6 are aligned with the positioning grooves 22 on the corresponding positioning columns 2 in the radial direction. At the same time, the positioning surfaces 21 on the corresponding positioning columns 2 are in contact with the corresponding arc segments of the multi-arc combined annular workpiece 6.

[0046] In this embodiment, by forming a series of positioning holes 11 corresponding one-to-one to the connection holes on the multi-arc combined annular workpiece 6 along the circumferential direction on the positioning disk 1, the positioning columns 2 installed at the positioning holes 11 of the positioning disk 1 can be arranged completely according to the actual distribution of the connection holes on the multi-arc combined annular workpiece 6, providing a prerequisite for the smooth alignment in the radial direction between the positioning grooves 22 on the positioning columns 2 and the connection holes on the corresponding arc segments of the multi-arc combined annular workpiece 6 in subsequent positioning operations. Thus, the versatility and adaptability of the positioning device for the turbine inserted-tooth gland ring are improved. No matter facing a multi-arc combined annular workpiece 6 with evenly distributed or complex and variable connection holes, it can be easily dealt with, effectively meeting the diverse production requirements and providing a strong guarantee for efficient and accurate positioning in the production process. Here, by rotating the positioning column 2 and adjusting the adjustment mechanism 3, the positioning grooves 22 on the positioning column 2 can be aligned with the connection holes on the corresponding arc segments of the multi-arc combined annular workpiece 6. The operation is relatively simple, without a complex installation and adjustment process, and there is no need to separately customize complex tooling for different workpieces, reducing the operation difficulty and tooling cost and improving the production efficiency.

[0047] Among them, the multi-arc combined annular workpiece 6 is specifically an inserted-tooth gland ring. The inserted-tooth gland ring is spliced by a plurality of inserted-tooth gland ring arc segments, and each inserted-tooth gland ring arc segment is the arc segment part of the multi-arc combined annular workpiece 6. The connection holes on the multi-arc combined annular workpiece 6 are embodied as spring holes at the back arc of the inserted-tooth gland ring.

[0048] Among them, the positioning disk 1 is the basic part of the positioning device for the inserted-tooth steam seal ring of the entire steam turbine. It is roughly disc-shaped, and positioning holes 11 can be machined on it. The positioning holes 11 are the installation positions for the subsequent installation of the positioning posts 2. In this embodiment, the positioning posts 2 and the positioning holes 11 are connected by means of screws. It can be understood that when the screws are in an untightened state, the positioning posts 2 can rotate relative to the positioning holes 11; while when the screws are fully tightened, the positioning posts 2 are firmly fixed at the positioning holes 11 and can no longer rotate, thus ensuring the stability of the positioning posts 2 during the positioning process.

[0049] Specifically, a plurality of positioning holes 11 are provided on the positioning disk 1, and the number and positions of the positioning holes 11 are exactly the same as the connecting holes on the multi-arc segment combined annular workpiece 6, so that each positioning post 2 installed at the positioning holes 11 can correspond to a connecting hole.

[0050] Among them, each positioning post 2 is provided with a positioning groove 22 and a positioning surface 21. The positioning surface 21 is the part that contacts the arc surface of the multi-arc segment combined annular workpiece 6, and provides positioning support and restraint by fitting the workpiece surface; the positioning groove 22 is a structure for cooperating with the adjusting mechanism 3 to align the connecting holes on the annular workpiece, and plays a role of inserting a fastening element 4 to fix the positioning post 2 and the corresponding arc segment of the multi-arc segment combined annular workpiece 6 during the positioning process.

[0051] Specifically, during the process of the positioning groove 22 cooperating with the adjusting mechanism 3 to align the connecting holes on the annular workpiece, the specific operation steps are as follows: First, at each positioning hole 11, the positioning post 2 is connected to it by means of screws, and the screws are adjusted to an untightened state. At this time, the positioning post 2 can rotate flexibly relative to the positioning hole 11; then, according to the spacing distance between two radially opposite positioning posts 2, the length of the adjusting mechanism 3 is adjusted to adapt to this spacing; subsequently, the two radially opposite positioning posts 2 are regarded as a group, and both ends of the adjusting mechanism 3 are sequentially inserted into the respective positioning grooves 22 of the same group of positioning posts 2. After the insertion is completed, the screws are tightened to firmly lock the positioning post 2 in the current position; finally, each arc segment of the multi-arc segment combined annular workpiece 6 is sequentially installed on the positioning surface 21 of the corresponding positioning post 2. After the installation is completed, the fastening element 4 is passed through the positioning groove 22 on the positioning post 2 and inserted into the connecting hole of the annular workpiece, so as to achieve precise positioning and firm fixation of each arc segment of the multi-arc segment combined annular workpiece 6.

[0052] Among them, the fastening element 4 can be a bolt, a pin, a screw rod, etc., and can tightly connect each arc segment of the multi-arc segment combined annular workpiece 6 with the positioning post 2 through operations such as tightening and driving in. This application does not make any limitations in this regard.

[0053] Specifically, in this embodiment, refer to Figure 5As shown, the fastening element 4 is a hexagonal screw, one end of which is in contact with the side of the positioning column 2 away from the multi-arc segment combined annular workpiece 6, and the other end passes through the positioning groove 22 on the positioning column 2 and is inserted into the connecting hole of the multi-arc segment combined annular workpiece 6. Here, by contacting one end of the hexagonal screw with the side of the positioning column 2 away from the workpiece, and the other end passes through the positioning groove 22 on the positioning column 2 and is inserted into the connecting hole of the multi-arc segment combined annular workpiece 6, each arc segment of the workpiece can be tightly connected to the positioning column 2, thereby achieving accurate positioning and firm fixation of each arc segment of the multi-arc segment combined annular workpiece 6, ensuring that the workpiece will not be displaced or shaken during subsequent processing.

[0054] In some possible implementations disclosed in this application, see Figure 5 As shown, the positioning device for the turbine insert seal ring further includes a gasket assembly 5, which is arranged between the fastening element 4 and the side of the positioning column 2 away from the multi-arc segment combined annular workpiece 6.

[0055] In this embodiment, the washer assembly 5 can prevent the fastening element 4 from directly contacting the positioning column 2 during the tightening process, and prevent the fastening element 4 from causing damage to the surface of the positioning column 2, such as scratches and wear, so as to ensure the surface quality and precision of the positioning column 2 and extend its service life. At the same time, when the fastening element 4 is tightened, the washer assembly 5 can evenly distribute the tightening force to the surface of the positioning column 2, avoiding deformation or damage of the positioning column 2 due to excessive local pressure, and improving the structural stability and reliability of the positioning column 2.

[0056] Among them, see Figure 5 As shown, the washer assembly 5 includes a flat washer, which is arranged close to the positioning column 2. Here, the flat washer is arranged close to the positioning column 2, which can increase the contact area between the fastening element 4 and the positioning column 2. In this way, when tightening the fastening element 4, the fastening force can be more evenly distributed on the surface of the positioning column 2, avoiding excessive local pressure and preventing the surface of the positioning column 2 from being deformed or damaged due to uneven force. At the same time, the flat washer, as an intermediate medium, can isolate the fastening element 4 from the positioning column 2, preventing the fastening element 4 from directly rubbing against the surface of the positioning column 2 during tightening or loosening, thereby protecting the accuracy and smoothness of the surface of the positioning column 2 and extending the service life of the positioning column 2. At the same time, the flat washer has a certain thickness, which can be used to compensate for the slight height error between the positioning column 2 and the fastening element 4, so that the two can better cooperate and ensure the tightness of the connection.

[0057] Among them, see Figure 5As shown, the washer assembly 5 further includes a spring washer, which is disposed between the flat washer and the head of the fastening element 4. Here, the spring washer is arranged between the flat washer and the head of the fastening element 4, and can provide a certain elastic pre-tightening force after the fastening element 4 is tightened. When the positioning device for the turbine inserted-tooth steam seal ring is subjected to external forces such as vibration, impact or temperature change, the spring washer can absorb and buffer these external forces through its own elastic deformation, prevent the fastening element 4 from loosening, and ensure that the connection between the positioning post 2 and the multi-arc segment combined annular workpiece 6 always remains in a tightened state. At the same time, the elastic effect of the spring washer can endow the fastening connection with a certain degree of self-adaptive ability. Even under long-term use or when the working conditions change, the stability of the connection can be maintained, the risk of reduced positioning accuracy or component damage caused by connection loosening can be reduced, and the reliability and stability of the positioning device for the turbine inserted-tooth steam seal ring are improved.

[0058] In some possible embodiments disclosed in the present application, refer to Figure 3 As shown, on one side of the positioning post 2 relative to the positioning surface 21, there is an abutting surface 23, and the abutting surface 23 is a vertical surface, and the vertical surface is used to cooperate with the fastening element 4.

[0059] In this embodiment, by setting the abutting surface 23 as a vertical surface, when cooperating with the fastening element 4, a clear and accurate positioning reference can be provided. It can be understood that the perpendicularity and flatness of the vertical surface are relatively easy to ensure, which enables the fastening element 4 to accurately align with the positioning groove 22 on the positioning post 2 and the connection hole on the multi-arc segment combined annular workpiece 6 during installation and tightening, ensuring the accuracy and reliability of positioning.

[0060] In some possible embodiments disclosed in the present application, refer to Figure 2 As shown, at least part of the positioning surface 21 is a curved surface structure 211, and the radius of curvature of the curved surface structure 211 is equal to the radius of curvature of the corresponding arc segment of the multi-arc segment combined annular workpiece 6.

[0061] In this embodiment, the curved surface structure 211 fits perfectly with the corresponding arc segment of the multi-arc combined annular workpiece 6, and can provide an accurate positioning reference for the workpiece during positioning, ensuring that when the workpiece is installed on the positioning post 2, its position is accurate and error-free, thereby improving the positioning accuracy and meeting the requirements for high-precision positioning of the multi-arc combined annular workpiece 6 during the production process. At the same time, since the positioning surface 21 perfectly matches the curved surface of the workpiece arc segment, the contact area between the two is large, and it can provide stable support for the multi-arc combined annular workpiece 6. During positioning and subsequent processing, the workpiece can be effectively prevented from shaking, shifting or deforming, ensuring the stability of the workpiece during processing, which is beneficial to improving the processing quality and product consistency. At the same time, the positioning surface 21 of the curved surface structure 211 fits tightly with the workpiece arc segment, avoiding surface wear or scratches of the workpiece caused by gaps or mismatches between the positioning surface 21 and the workpiece. This is particularly important for some multi-arc combined annular workpieces 6 with high surface quality requirements, which can effectively protect the surface quality of the workpiece and reduce the scrap rate caused by surface damage.

[0062] Among them, in this embodiment, the part of the positioning surface 21 facing the outer edge of the multi-arc combined annular workpiece 6 is the curved surface structure 211.

[0063] Specifically, the shape and curvature of the curved surface structure 211 are determined according to the shape and curvature of the corresponding arc segment of the multi-arc combined annular workpiece 6, and its radius of curvature is equal to the radius of curvature of the corresponding arc segment of the workpiece, so as to ensure that the positioning surface 21 and the workpiece can fit tightly, realizing accurate positioning and stable support. For example, if a certain segment of the multi-arc combined annular workpiece 6 is an arc with a radius of R, then the corresponding part of the positioning surface 21 is a curved surface that matches this arc and also has a radius of R.

[0064] In some possible embodiments disclosed in the present application, as shown in Figure 2 shown, at least part of the positioning surface 21 is a planar structure 212, and the planar structure 212 is used to carry the corresponding arc segment in the multi-arc combined annular workpiece 6.

[0065] In this embodiment, the planar structure 212 can provide a flat bearing surface for the corresponding arc segment in the multi-arc combined annular workpiece 6, enabling the workpiece to be stably placed on the positioning surface 21 during positioning, effectively reducing the shaking and displacement of the workpiece during bearing, and providing a stable basis for subsequent processing or assembly operations. At the same time, the planar structure 212 has a clear geometric shape and boundary. When positioning the multi-arc combined annular workpiece 6, the operator can more conveniently align and position the corresponding arc segment of the workpiece with the planar structure 212. The intuitiveness of the plane helps to improve the accuracy and efficiency of positioning. Especially for some workpieces with regular shapes and easy-to-match arcs and planes, precise installation can be quickly achieved.

[0066] Among them, in this embodiment, the part of the positioning surface 21 facing the bottom surface of the multi-arc combined annular workpiece 6 is a planar structure 212.

[0067] Specifically, when installing a certain arc segment of the multi-arc combined annular workpiece 6 onto the positioning post 2, it needs to be placed on the planar structure 212 of the corresponding positioning surface 21. The planar structure 212 provides a stable placement platform for this arc segment. The two cooperate with each other to achieve the positioning of the workpiece and ensure the position accuracy of the workpiece during subsequent processing or assembly.

[0068] In some possible embodiments disclosed in this application, refer to Figure 4 As shown, the adjustment mechanism 3 includes: a stud rod 31, a screw sleeve 32, and a positioning head 33; the screw sleeve 32 is sleeved on the stud rod 31 and is threadedly connected to the stud rod 31; the positioning heads 33 are respectively arranged at two opposite ends of the stud rod 31 and the screw sleeve 32, and the positioning heads 33 can be embedded into the positioning grooves 22 on two positioning posts 2 arranged oppositely in the radial direction.

[0069] In this embodiment, through the threaded connection between the stud rod 31 and the screw sleeve 32, when the screw sleeve 32 is rotated, due to the transmission effect of the thread, the screw sleeve 32 will move axially along the stud rod 31, thereby realizing the length adjustment of the entire adjustment mechanism 3.

[0070] Among them, the stud rod 31 is the basic rod-shaped component of the adjustment mechanism 3. One end of it has an external thread, which is used to provide guidance and support for the movement of the screw sleeve 32 to determine the movement path of the screw sleeve 32.

[0071] Among them, the screw sleeve 32 is a sleeve-shaped part with an internal thread matching the stud rod 31. In the actual application scenario, the screw sleeve 32 is sleeved on the stud rod 31. Through the threaded cooperation with the stud rod 31, it can move axially along the stud rod 31 when rotated, so as to change the overall length of the adjustment mechanism 3.

[0072] Among them, there are two positioning heads 33. The two positioning heads 33 are respectively installed at two opposite ends of the stud rod 31 and the screw sleeve 32, and their connection methods can be male-female port mating connection or threaded connection, etc.

[0073] Specifically, in an actual application scenario, after adjusting the length of the adjusting mechanism 3 according to the spacing distance between two positioning posts 2 arranged oppositely along the radial direction, by rotating the two positioning posts 2 in the same group, the two positioning heads 33 of the adjusting mechanism 3 can be respectively inserted into the positioning slots 22 of the two positioning posts 2. It should be noted that after the two positioning heads 33 of the adjusting mechanism 3 are respectively inserted into the positioning slots 22 of the two positioning posts 2, the positioning slots 22 of the two positioning posts 2 in this group can be aligned with the connection holes on the corresponding arc segments of the multi-arc segment combined annular workpiece 6, so that subsequently, the fastening element 4 can pass through the positioning slots 22 on the positioning posts 2 and be inserted into the connection holes of the annular workpiece, thereby realizing the precise positioning and firm fixation of each arc segment of the multi-arc segment combined annular workpiece 6.

[0074] Further, in order to fully illustrate the specific implementation process of this embodiment, a positioning method for a turbine inserted-tooth gland packing ring is provided. Refer to Figure 6 As shown, this method includes:

[0075] Step S101: Open a plurality of positioning holes 11 on the positioning disk 1 so that the plurality of positioning holes 11 correspond one-to-one to the plurality of connection holes provided on the multi-arc segment combined annular workpiece 6.

[0076] Here, the positioning disk 1 is the basic part of the positioning device for the turbine inserted-tooth gland packing ring, and is generally disk-shaped. In order to accurately position the multi-arc segment combined annular workpiece 6, it is necessary to open positioning holes 11 on the positioning disk 1 according to the actual distribution of the connection holes on the multi-arc segment combined annular workpiece 6, with the same number and positions. For example, if there are 10 connection holes on the multi-arc segment combined annular workpiece 6, then 10 positioning holes 11 are opened at the corresponding positions on the positioning disk 1, so that each positioning hole 11 can correspond to a connection hole, providing an accurate installation position for the subsequent installation of the positioning posts 2, and thus laying a foundation for the entire positioning operation.

[0077] Step S102: Install a rotatable positioning post 2 at each positioning hole 11.

[0078] Here, after the positioning holes 11 are opened on the positioning disk 1, the positioning posts 2 are installed at the corresponding positioning holes 11. The positioning posts 2 and the positioning holes 11 are connected by screws, and during installation, the screws are adjusted to an untightened state. The purpose of this is to enable the positioning posts 2 to rotate flexibly relative to the positioning holes 11, facilitating subsequent adjustment of the positions of the positioning posts 2 according to the specific situation of the multi-arc segment combined annular workpiece 6 to achieve accurate positioning. If the screws are tightened, the positioning posts 2 will be firmly fixed at the positioning holes 11 and cannot rotate, and thus the position adjustment cannot be performed.

[0079] Step S103: Rotate the positioning posts 2 group by group and control the length of the adjustment mechanism 3 so that both ends of the adjustment mechanism 3 extend into the positioning grooves 22 of the two positioning posts 2 in the corresponding group respectively. After each operation of aligning the connection holes on the multi-arc combined annular workpiece 6 with the positioning grooves 22 on the corresponding positioning posts 2 in the radial direction is completed, the corresponding group of positioning posts 2 is fixed.

[0080] Here, two positioning posts 2 arranged oppositely in the radial direction are regarded as a group. Since the positioning posts 2 were rotatable before, rotational operations can be performed on each group of positioning posts 2. The purpose of rotating the positioning posts 2 is to adjust the positions of the positioning grooves 22 on the positioning posts 2 so that they can be aligned with the connection holes on the corresponding arcs of the multi-arc combined annular workpiece 6 in the radial direction. The adjustment mechanism 3 includes a stud rod 31, a screw sleeve 32, and a positioning head 33. By rotating the screw sleeve 32, using the threaded connection between the stud rod 31 and the screw sleeve 32, the screw sleeve 32 moves axially along the stud rod 31, thereby realizing the regulation of the overall length of the adjustment mechanism 3. According to the spacing between the two positioning posts 2 arranged oppositely in the radial direction, the length of the adjustment mechanism 3 is adjusted to fit this spacing. After adjusting the length of the adjustment mechanism 3, both ends of the adjustment mechanism 3 are respectively inserted into the respective positioning grooves 22 of the same group of positioning posts 2. When the two positioning heads 33 of the adjustment mechanism 3 are respectively inserted into the positioning grooves 22 of the two positioning posts 2, the positioning grooves 22 of the two positioning posts 2 in this group can be aligned with the connection holes on the corresponding arcs of the multi-arc combined annular workpiece 6. After the operation of aligning the connection holes on the multi-arc combined annular workpiece 6 with the positioning grooves 22 on the corresponding positioning posts 2 in the radial direction is completed, the screws on the corresponding group of positioning posts 2 are tightened, so that the positioning posts 2 are firmly locked in the current position to prevent the positioning posts 2 from rotating during subsequent operations, thereby ensuring the accuracy of positioning.

[0081] Step S104: Fix each arc of the multi-arc combined annular workpiece 6 to the corresponding positioning post 2 one by one.

[0082] Here, after the above steps are completed, so that the connection holes on the multi-arc combined annular workpiece 6 are aligned with the positioning grooves 22 on the corresponding positioning posts 2 in the radial direction and the positioning posts 2 are fixed, each arc of the multi-arc combined annular workpiece 6 is sequentially installed on the positioning surface 21 of the corresponding positioning post 2. Then, through the fastening element 4 (such as a hexagon screw, etc.), it passes through the positioning groove 22 on the positioning post 2 and is inserted into the connection hole of the annular workpiece, thereby realizing the precise positioning and firm fixation of each arc of the multi-arc combined annular workpiece 6, ensuring that the workpiece will not be displaced or shaken during subsequent processing or use.

[0083] Furthermore, as a refinement and extension of the specific implementation manner of the above embodiment, in order to fully illustrate the specific implementation process of this embodiment, another positioning method for a steam turbine inserted-tooth steam seal ring is provided. This method includes:

[0084] Step S201: A plurality of positioning holes 11 are formed in the positioning plate 1, and the plurality of positioning holes 11 correspond one-to-one to the plurality of connection holes provided on the multi-arc segment combined annular workpiece 6.

[0085] Step S202: A rotatable positioning post 2 is installed at each positioning hole 11.

[0086] Step S203: Rotate the positioning posts 2 group by group and control the length of the adjustment mechanism 3, so that both ends of the adjustment mechanism 3 respectively extend into the positioning grooves 22 of the two positioning posts 2 in the corresponding group. After each operation of aligning the connection holes on the multi-arc segment combined annular workpiece 6 with the positioning grooves 22 on the corresponding positioning posts 2 in the radial direction is completed, the positioning posts 2 in the corresponding group are fixed.

[0087] Step S204: Machine the positioning surface 21 on the positioning post 2 according to the outer diameter dimension of the multi-arc segment combined annular workpiece 6.

[0088] Step S205: Fix each arc segment of the multi-arc segment combined annular workpiece 6 to the corresponding positioning post 2 one by one.

[0089] In this embodiment, by machining the positioning surface 21 on the positioning post 2 according to the outer diameter dimension of the workpiece in Step S204, the fit between the positioning post 2 and the workpiece can be made more precise. It should be noted that different multi-arc segment combined annular workpieces 6 may have different outer diameter dimensions, and even for workpieces of the same type, there may be certain dimensional deviations during the manufacturing process. By machining the positioning surface 21 according to the outer diameter dimension of the specific workpiece, it can ensure that the gap between the positioning post 2 and the workpiece is uniform and minimized, thereby reducing the positioning error, improving the accuracy and reliability of positioning, and enabling the workpiece to maintain the correct position and posture during subsequent processing or assembly. Specifically, a suitable positioning surface 21 can better fit the outer surface of the workpiece and provide more stable support and positioning for the workpiece. When the positioning surface 21 of the positioning post 2 matches the outer diameter dimension of the workpiece, the workpiece is placed more stably on the positioning post 2 and is not prone to shaking or offset. During the processing or assembly of the multi-arc segment combined annular workpiece 6, it may be subjected to various external forces, such as clamping force, cutting force, etc. Stable positioning can effectively resist these external forces and ensure that the position of the workpiece remains unchanged throughout the process, thereby improving the processing quality and assembly accuracy.

[0090] Those skilled in the art can easily understand that, on the premise of no conflict, the above advantageous ways can be freely combined and superimposed.

[0091] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application. The above is only the preferred implementation manner of the present application. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present application, several improvements and variations can also be made, and these improvements and variations should also be regarded as within the protection scope of the present application.

Claims

1. A positioning device for a toothed steam seal ring of a steam turbine, characterized in that, include: A positioning plate, wherein a plurality of positioning holes are formed on the positioning plate, and the plurality of positioning holes are distributed along the circumferential direction of the multi-arc segment combined annular workpiece and correspond one-to-one to the plurality of connection holes provided on the multi-arc segment combined annular workpiece; A plurality of positioning posts, wherein the plurality of positioning posts are respectively connected to the plurality of positioning holes in a one-to-one correspondence, and each of the positioning posts is provided with a positioning surface and a positioning groove; An adjustment mechanism, wherein the length of the adjustment mechanism is adjustable. By rotating the positioning column, the two ends of the adjustment mechanism can respectively extend into the positioning grooves on any group of two positioning columns that are relatively arranged in the radial direction, so that the connecting holes on the multi-arc-segment combined annular workpiece are aligned with the positioning grooves on the corresponding positioning columns in the radial direction. At the same time, the positioning surfaces on the corresponding positioning columns are fitted with the corresponding arc segments in the multi-arc-segment combined annular workpiece.

2. The positioning device for the inserted-tooth steam seal ring of a steam turbine according to claim 1, characterized in that, Also includes: A fastening element, one end of which abuts against a side of the positioning column away from the multi-arc segment combined annular workpiece, and the other end passes through the positioning groove on the positioning column and is inserted into the connecting hole of the multi-arc segment combined annular workpiece.

3. The positioning device for the inserted-tooth steam seal ring of a steam turbine according to claim 2, characterized in that, Also includes: A washer assembly is arranged between the fastening element and a side of the positioning column away from the multi-arc segment combined annular workpiece.

4. The positioning device for the inserted-tooth steam seal ring of a steam turbine according to claim 3, wherein, The gasket assembly comprises: A flat washer, the flat washer being arranged close to the positioning column; A spring washer is arranged between the flat washer and the head of the fastening element.

5. The positioning device for the inserted-tooth steam seal ring of a steam turbine according to claim 2, wherein, A contact surface is provided on the positioning column at one side opposite to the positioning surface. The contact surface is a vertical surface used to cooperate with the fastening element.

6. The positioning device for the inserted-tooth steam seal ring of a steam turbine according to claim 1, characterized in that, At least a portion of the positioning surface is a curved surface structure, and the curvature radius of the curved surface structure is equal to the curvature radius of the corresponding arc segment of the multi-arc segment combined annular workpiece.

7. The positioning device for the inserted-tooth steam seal ring of a steam turbine according to claim 1, characterized in that, At least a portion of the positioning surface is a planar structure, and the planar structure is used to support the corresponding arc segments in the multi-arc segment combined annular workpiece.

8. The positioning device for the inserted-tooth steam seal ring of a steam turbine according to claim 1, characterized in that, The adjustment mechanism comprises: Stud rods, screw sleeves and dowel heads; The screw sleeve is sleeved on the stud rod and is threadedly connected with the stud rod; The positioning heads are respectively arranged at two ends of the stud rod and the screw sleeve which are away from each other, and the positioning heads can be embedded in the positioning grooves on the two positioning columns which are arranged opposite to each other in the radial direction.

9. A positioning method for a toothed gland packing ring of a steam turbine, characterized in that, The positioning device for a turbine insert seal ring according to any one of claims 1 to 8, wherein the method comprises: A plurality of positioning holes are provided on the positioning plate, so that the plurality of positioning holes correspond one to one with the plurality of connecting holes provided on the multi-arc segment combined annular workpiece; A rotatable positioning column is installed at each positioning hole; The positioning columns are rotated group by group and the length of the adjustment mechanism is controlled so that the two ends of the adjustment mechanism are respectively extended into the positioning grooves of the two positioning columns of the corresponding group. After each operation of aligning the connecting holes on the multi-arc segment combined annular workpiece with the positioning grooves on the corresponding positioning columns in the radial direction is completed, the positioning columns of the corresponding group are fixed; Each arc segment of the multi-arc segment combined annular workpiece and the corresponding positioning column are fixed one by one.

10. The positioning method for the inserted-tooth steam seal ring of a steam turbine according to claim 9, characterized in that, Before fixing the arc segments of the multi-arc segment combined annular workpiece and the corresponding positioning pillars one by one, the method further includes: Machine the positioning surface on the positioning post according to the outer diameter dimension of the multi-arc combined annular workpiece.

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