Positioning device

Abstract

The utility model relates to the technical field of steam turbine overhaul, in particular to a positioning device. The positioning device comprises a positioning piece, two first adjusting pieces and a clamping piece. The positioning piece comprises two cantilevers which are arranged at intervals in the first direction, and an opening is formed between the two cantilevers; the two first adjusting pieces are arranged on the two cantilevers in a one-to-one correspondence mode, each first adjusting piece can move in the first direction relative to the corresponding cantilever, and a clamping opening is formed between the two first adjusting pieces; the clamping piece is arranged on the positioning piece in a sliding mode in the first direction, and the clamping piece is used for being matched with one cantilever to clamp the bearing box. According to the positioning device, the clamping piece is arranged to clamp the bearing box body, so that the bearing box body is not prone to deformation and sliding in the using process; by arranging the two second adjusting pieces, the positioning accuracy of the bearing body is improved, the position of the bearing body in the axial direction can be adjusted by adjusting the two second adjusting pieces, operation is convenient, and then the labor intensity of an operator is greatly relieved.

Description

Technical Field

[0001] This utility model relates to the field of steam turbine maintenance technology, and in particular to a positioning device. Background Technology

[0002] When a steam turbine is operating, the rotor is subjected to axial thrust generated by the steam flow. The thrust bearing can withstand the axial thrust of the rotor and determine the axial position of the rotor. The thrust clearance refers to the allowable clearance value of the rotor when moving axially under the action of the thrust bearing. The size of this clearance directly affects the safe operation and performance of the steam turbine.

[0003] During the overhaul of the low- and intermediate-pressure bearing housings in steam turbines, it is often necessary to remove the thrust bearings from the housings for inspection and maintenance. After maintenance, the bearings need to be reinstalled in their original positions within the housings, and the thrust clearance must be measured to ensure it is appropriate. The reinstallation process requires positioning and adjusting the bearing's axial position to meet the thrust clearance requirements. Current technology utilizes welded steel plates with positioning holes for clamping and positioning; however, this positioning tool is not standardized, its mechanical strength is insufficient for reinstallation requirements, its positioning accuracy is lacking, and its operation is complex and poses safety hazards. Therefore, a positioning device is needed to solve these problems. Utility Model Content

[0004] The purpose of this invention is to provide a positioning device that improves the positioning accuracy of bearings, reduces the labor intensity of operators, and improves work efficiency.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] Positioning device, including:

[0007] A positioning element, the positioning element comprising two cantilever arms spaced apart along a first direction, with an opening formed between the two cantilever arms;

[0008] Two first adjusting members are provided on the two cantilever arms in a one-to-one correspondence, and each first adjusting member can move relative to the corresponding cantilever arm along the first direction, and a clamping opening is formed between the two first adjusting members;

[0009] A clamping member is slidably disposed on the positioning member along the first direction, and the clamping member is used to cooperate with one of its cantilever arms to clamp an external component.

[0010] As an optional technical solution, the first adjusting member is a first bolt, each of the cantilever arms is provided with a threaded hole, and each of the first bolts is threadedly connected to the threaded hole (1111) of the corresponding cantilever arm.

[0011] As an optional technical solution, the positioning device further includes a second adjusting member and a support base. The second adjusting member extends along the first direction, the support base is disposed on the positioning member, the second adjusting member is rotatably disposed on the support base, the clamping member is threadedly connected to the second adjusting member, and the clamping member is slidably connected to the support base along the first direction.

[0012] As an optional technical solution, the support base is provided with a sliding groove, the second adjusting member passes through the sliding groove, the clamping member includes a sliding part and a clamping part fixedly connected, the sliding part is located in the sliding groove and screwed to the second adjusting member, the sliding part is slidably connected to the support base along the first direction, and the clamping part is located outside the sliding groove and is used to cooperate with one of its cantilever arms to clamp the external component.

[0013] As an optional technical solution, the support is fixed to one of the cantilever arms by bolts.

[0014] As an optional technical solution, the positioning device further includes a fixing nut, the second adjusting member passes through the support base and is screwed to the fixing nut, and the fixing nut can be tightened or separated from the support base.

[0015] As an optional technical solution, the positioning device further includes a connecting arm, which is connected between the two cantilever arms.

[0016] As an optional technical solution, the connecting arm is made of square steel.

[0017] As an optional technical solution, the cantilever includes a positioning part and a connecting part. One end of the connecting part is connected to the positioning part, and the other end of the connecting part is connected to the connecting arm. The first adjusting member is movably disposed on the positioning part, and a reinforcing rib is provided between the positioning part and the connecting part.

[0018] As an optional technical solution, the positioning device further includes an anti-slip component, which is detachably connected to the positioning component and is used to pad the outer component.

[0019] The beneficial effects of this utility model are:

[0020] This utility model provides a positioning device, comprising a positioning element, two first adjusting elements, and a clamping element. The positioning element includes two cantilever arms spaced apart along a first direction, with an opening between the two cantilever arms. The two first adjusting elements are correspondingly disposed on the two cantilever arms, and each first adjusting element can move relative to its corresponding cantilever arm along the first direction, forming a clamping opening between the two first adjusting elements. The clamping element is slidably disposed on the positioning element along the first direction and is used to cooperate with one of its cantilever arms to clamp the bearing housing. This positioning device, by clamping the bearing housing with the clamping element, fixes the positioning device to the bearing housing, making it less prone to deformation and slippage during use, thus ensuring the stability of the positioning device during operation. The two second adjusting elements improve the positioning accuracy of the bearing body; adjusting the two second adjusting elements allows for adjustment of the bearing body's position along its axial direction, making operation convenient and greatly reducing the operator's workload. Attached Figure Description

[0021] Figure 1 This is a first schematic diagram of the positioning device structure provided in this embodiment of the utility model;

[0022] Figure 2 This is a second schematic diagram of the positioning device structure provided in this embodiment of the utility model;

[0023] Figure 3 This is a structural schematic diagram of the positioning component provided in an embodiment of the present utility model.

[0024] In the picture:

[0025] 1. Positioning component; 11. Cantilever; 111. Positioning part; 1111. Threaded hole; 112. Connecting part; 113. Reinforcing rib; 114. Mounting part; 1141. Mounting hole; 12. Connecting arm;

[0026] 2. First adjusting component;

[0027] 3. Clamping component; 31. Sliding part; 32. Clamping part;

[0028] 4. Second adjusting component; 5. Support base; 51. Slide groove; 6. Fixing nut. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0033] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0036] The following is combined with Figures 1-3 The technical solution of this utility model will be further illustrated through specific embodiments.

[0037] During the maintenance of the low-pressure bearing housing in a steam turbine, the thrust bearing inside the low-pressure bearing housing needs to be removed for inspection and maintenance. To reassemble the bearing body back into its original position within the bearing housing, improve the accuracy of bearing body positioning, and thus ensure the required thrust clearance value, this utility model provides a positioning device, comprising a positioning component 1, two first adjusting components 2, and a clamping component 3. The positioning component 1 includes two cantilever arms 11 spaced apart along a first direction, with an opening between the two cantilever arms 11; the two first adjusting components 2 are correspondingly positioned on the two cantilever arms 11, and each first adjusting component 2 can move relative to its corresponding cantilever arm 11 along the first direction, forming a clamping opening between the two first adjusting components 2; the clamping component 3 is slidably mounted on the positioning component 1 along the first direction, and the clamping component 3 cooperates with one of its cantilever arms 11 to clamp the bearing housing.

[0038] The positioning device uses clamping members 3 to hold the bearing housing, thereby fixing the positioning device to the bearing housing. This prevents the positioning device from deforming or sliding during use, ensuring its stability. The bearing body can enter the clamping opening through the opening and is held by two first adjusting members 2. By setting two first adjusting members 2, the positioning accuracy of the bearing body is improved. Adjusting the two first adjusting members 2 allows for adjustment of the bearing body's position along its axial direction, making operation convenient and greatly reducing the operator's workload. It should be noted that in this embodiment, the first direction is consistent with the axial direction of the bearing body.

[0039] Furthermore, the positioning device also includes an anti-slip component, which is detachably connected to the positioning component and is used to pad the outer component. In this embodiment, the outer component is a bearing housing, the anti-slip component is located on the side of the positioning component 1 away from the first adjusting component 2, and the anti-slip component is padded between the positioning component 1 and the bearing housing. After the device is fixed to the bearing housing, placing the anti-slip component between the positioning component 1 and the bearing housing avoids hard contact between the positioning component 1 and the bearing housing, reduces wear on the positioning device, and thus improves the strength of the device. Optionally, in this embodiment, the anti-slip component is a rubber pad.

[0040] Furthermore, the first adjusting member 2 is a first bolt, and each cantilever 11 is provided with a threaded hole 1111, with each first bolt threadedly connected to the threaded hole 1111 of the corresponding cantilever 11. In this embodiment, the two cantilever 11s are spaced apart and placed opposite each other along the first direction, and the center lines of the two threaded holes 1111 are collinear along the first direction, thereby making the axes of the two first bolts collinear. This collinear positioning method improves the accuracy of bearing body positioning. The two first bolts have one end of a screw facing each other. When installing the bearing body, the first bolts are moved along the first direction by rotating the nut with a wrench, thereby adjusting the position of the bearing body along its axial direction. This arrangement facilitates the adjustment of the position of the first adjusting member 2 along the first direction.

[0041] Furthermore, such as Figure 3 As shown, the positioning component 1 also includes a connecting arm 12, which connects the two cantilever arms 11. Specifically, in this embodiment, the two cantilever arms 11 are respectively L-shaped, with one end of each L-shaped structure connected to both ends of the connecting arm 12. The other ends of the two L-shaped structures are placed opposite each other to form an opening. Two first bolts are respectively disposed at the ends of the two L-shaped structures near the openings. Each end of the two cantilever arms 11 near the opening is provided with a threaded hole 1111, and the two first bolts are screwed into the two threaded holes 1111 one-to-one. The connecting arm 12 connects the two cantilever arms 11, which facilitates the processing of the positioning component 1 and thus reduces the processing cost of the positioning device.

[0042] In this embodiment, the connecting arm 12 is made of square steel. Square steel has high strength and good structural stability, which in turn improves the stability of the positioning device structure. Furthermore, both cantilever arms 11 are welded to the connecting arm 12; welding not only facilitates processing but also ensures good connection stability between the cantilever arms 11 and the connecting arm 12, thereby making the overall structure of the device more stable.

[0043] Furthermore, the cantilever 11 includes a positioning part 111 and a connecting part 112. One end of the connecting part 112 is connected to the positioning part 111, and the other end of the connecting part 112 is connected to the connecting arm 12. The first adjusting member 2 is movably disposed on the positioning part 111. A threaded hole 1111 is disposed on the positioning part 111, and a reinforcing rib 113 is disposed between the positioning part 111 and the connecting part 112. In this embodiment, the positioning part 111 and the connecting part 112 are arranged in an L-shape, and the reinforcing rib 113 is disposed between the positioning part 111 and the connecting part 112, which further improves the stability of the cantilever 11 structure.

[0044] Furthermore, such as Figures 1-2As shown, the positioning device also includes a second adjusting member 4 and a support base 5. The second adjusting member 4 extends along a first direction, and the support base 5 is disposed on the positioning member 1. The second adjusting member 4 is rotatably disposed on the support base 5. The clamping member 3 is threadedly connected to the second adjusting member 4, and the clamping member 3 is slidably connected to the support base 5 along the first direction. Specifically, the support base 5 is provided with a slide groove 51, the second adjusting member 4 passes through the slide groove 51, and the clamping member 3 includes a sliding part 31 and a clamping part 32 fixedly connected. The sliding part 31 is located inside the slide groove 51 and is threadedly connected to the second adjusting member 4. The sliding part 31 is slidably connected to the support base 5 along the first direction, and the clamping part 32 is located outside the slide groove 51 and is used to cooperate with one of its cantilever 11 to clamp the bearing housing. The second adjusting member 4 is threadedly connected to the sliding part 31. Rotating the second adjusting member 4 causes the sliding part 31 to move along the first direction, thereby bringing the clamping part 32 into contact with the surface of the bearing housing. The other side of the bearing housing is in contact with one of the cantilever arms 11. The clamping member 3 clamps the bearing housing, thus completing the fixation of the device on the bearing housing. This design improves the mechanical strength of the device during use, making it less prone to deformation and slippage, and ensuring the stability of the device during use. The clamping member 3 moves along the first direction with the rotation of the second adjusting member 4, thus clamping the bearing housing and improving the accuracy of the device installation.

[0045] In this embodiment, the sliding part 31 and the clamping part 32 have a convex structure. The shape of the sliding part 31 is consistent with the cross-sectional shape of the groove 51, so that the sliding part 31 abuts against the groove wall of the groove 51, and the end of the clamping part 32 near the sliding part 31 abuts against the groove wall at the groove opening end of the groove 51. This arrangement can prevent the clamping part 3 from shaking during the sliding process, and further ensure the positioning accuracy.

[0046] Optionally, in this embodiment, the second adjusting member 4 is a second bolt. The screw end of the second bolt passes through the slide groove 51 and is screwed to the sliding part 31. The nut of the second bolt is located outside the groove wall of the slide groove 51. By rotating the nut of the second bolt, the sliding part 31 can move along the first direction, thereby realizing the sliding of the clamping member 3 along the first direction.

[0047] Furthermore, the positioning device also includes a fixing nut 6. The second adjusting member 4 passes through the support base 5 and is screwed onto the fixing nut 6. The fixing nut 6 can be tightened or detached from the support base 5. Specifically, the nut of the second bolt is located on the outer side of one side wall of the slide groove 51, and the screw extends out of the slide groove 51 along the other side wall in the first direction. After rotating the second bolt to adjust the clamping member 3 to a suitable position, the fixing nut 6 is screwed onto the screw end of the second bolt and tightened against the support base 5. This setting can prevent the clamping member 3 from sliding due to the movement of the second bolt, thereby ensuring the stability of the device during use. After the bearing body is installed in place, the fixing nut 6 is unscrewed to separate it from the support base 5, and the positioning device can be disassembled.

[0048] In some other embodiments, the second adjusting member 4 can also be a screw, with both ends of the screw located on the outer side of the groove wall of the slide 51. After the clamping member 3 is adjusted into place, two fixing nuts 6 are screwed to both ends of the screw respectively. The specific form of the second adjusting member 4 is not specifically limited here.

[0049] Furthermore, the support base 5 is fixed to one of the cantilever arms 11 by bolts. Specifically, the cantilever arm 11 includes a first cantilever and a second cantilever. The support base 5 is disposed at the connecting portion 112 of the second cantilever. The second cantilever also includes a mounting portion 114, which is disposed at the connecting portion 112 of the second cantilever. The mounting portion 114 is provided with a mounting hole 1141. The second adjusting member 4 passes through the mounting hole 1141 and the sliding groove 51, so that one end of the support base 5 abuts against the mounting portion 114, thereby fixing the support base 5 to the second cantilever. The support base 5 has extension portions on both sides perpendicular to the first direction. The extension portions are connected to the connecting portion 112 by bolts, thereby achieving a fixed connection between the support base 5 and the second cantilever. The bolt connection is convenient to operate and facilitates installation and disassembly.

[0050] The following details the positioning process of the positioning device for the bearing body:

[0051] First, align one side of the connecting arm 12 with the surface of the bearing housing, and align the side of the second cantilever near the clamping member 3 with the bearing housing. Rotate the second adjusting member 4 to adjust the position of the clamping member 3 along the first direction, thereby adjusting the gap between the clamping member 3 and the cantilever 11, so that the surfaces of the clamping member 3 and the second cantilever opposite to one side of the bearing housing are tightly fitted. The clamping member 3 clamps the bearing housing, thus completing the fixation of the positioning device on the bearing housing. Thread the fixing nut 6 to the second adjusting member 4, and tighten the fixing nut 6 against the support seat 5. At this point, the bearing body is located between the two first adjusting members 2. Then, adjust one of the first adjusting members 2 along the first direction to bring it closer to one side of the bearing body until it is in contact with the bearing body. Similarly, adjust the other first adjusting member 2 to bring it closer to the other side of the bearing body until it is in contact with the bearing body. At this point, the positioning of the bearing body is complete. After the bearing body is positioned, the bearing body can be moved along its axial direction by adjusting the two first adjusting members 2 until the thrust clearance reaches a suitable value, thus completing the reassembly of the bearing body. After the device is used, rotate the two first adjusting parts 2 to move them away from the bearing body; unscrew the fixing nut 6, rotate the second adjusting part 4 to move the clamping part 3 away from the bearing housing, and remove the device from the bearing housing.

[0052] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A positioning device, characterized in that, include: Positioning element (1), the positioning element (1) includes two cantilever (11) spaced apart along a first direction, with an opening formed between the two cantilever (11); Two first adjusting members (2) are provided on the two cantilever arms (11) in a one-to-one correspondence, and each first adjusting member (2) can move relative to the corresponding cantilever arm (11) along the first direction, and a clamping opening is formed between the two first adjusting members (2); The clamping member (3) is slidably disposed on the positioning member (1) along the first direction, and the clamping member (3) is used to cooperate with one of the cantilever (11) to clamp the external component.

2. The positioning device according to claim 1, characterized in that, The first adjusting member (2) is a first bolt, and each cantilever (11) is provided with a threaded hole (1111). Each first bolt is threadedly connected to the threaded hole (1111) of the corresponding cantilever (11).

3. The positioning device according to claim 1, characterized in that, The positioning device further includes a second adjusting member (4) and a support base (5). The second adjusting member (4) extends along the first direction, and the support base (5) is disposed on the positioning member (1). The second adjusting member (4) is rotatably disposed on the support base (5). The clamping member (3) is threadedly connected to the second adjusting member (4), and the clamping member (3) is slidably connected to the support base (5) along the first direction.

4. The positioning device according to claim 3, characterized in that, The support base (5) is provided with a slide groove (51), the second adjusting member (4) passes through the slide groove (51), the clamping member (3) includes a sliding part (31) and a clamping part (32) fixedly connected, the sliding part (31) is located in the slide groove (51) and screwed to the second adjusting member (4), the sliding part (31) is slidably connected to the support base (5) along the first direction, and the clamping part (32) is located outside the slide groove (51) and is used to cooperate with one of its cantilever (11) to clamp the outer component.

5. The positioning device according to claim 4, characterized in that, The support base (5) is fixed to one of the cantilever arms (11) by bolts.

6. The positioning device according to claim 4, characterized in that, The positioning device further includes a fixing nut (6), the second adjusting member (4) passes through the support base (5) and is screwed to the fixing nut (6), and the fixing nut (6) can be pressed against or separated from the support base (5).

7. The positioning device according to any one of claims 1-6, characterized in that, The positioning element (1) also includes a connecting arm (12) which is connected between the two cantilever arms (11).

8. The positioning device according to claim 7, characterized in that, The connecting arm (12) is made of square steel.

9. The positioning device according to claim 7, characterized in that, The cantilever (11) includes a positioning part (111) and a connecting part (112). One end of the connecting part (112) is connected to the positioning part (111), and the other end of the connecting part (112) is connected to the connecting arm (12). The first adjusting member (2) is movably disposed on the positioning part (111), and a reinforcing rib (113) is provided between the positioning part (111) and the connecting part (112).

10. The positioning device according to any one of claims 1-6, characterized in that, The positioning device further includes an anti-slip component, which is detachably connected to the positioning component (1) and is used to pad the outer component.

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