A device for drilling a split surface in an oval bearing of a steam turbine

Abstract

The application belongs to the technical field of elliptical bearing processing, and particularly relates to a middle split surface drilling device for a steam turbine elliptical bearing. The middle split surface is provided with a drilling device. The drilling device comprises a support plate and a split component. The support plate is provided with a plurality of connecting holes. The connecting holes are aligned with the holes in the middle split surface. An empty slot is arranged at the position of an aligned hole I on the support plate. A connecting plate is arranged above the empty slot. The split component comprises a split frame and a driving structure. The split frame is provided with connecting ports opposite to the positions of the empty slots on both sides. An inclined table is arranged in the split frame. The inclined surface of the inclined table is opposite to the connecting ports. A plurality of gaskets are arranged on the inclined table. The driving structure comprises a support column and a rotating wheel rotatably connected below the support column. The support column penetrates through the split frame and is slidably connected with the split frame. The support column drives the rotating wheel to approach the gaskets. The gaskets are caused to slide out of the connecting port positions to the empty slots by friction. A drill bit extends into the connecting hole to drill the holes in the middle split surface.

Description

Technical Field

[0001] This invention relates to the field of elliptical bearing processing technology, and in particular to a drilling device for the split surface of a steam turbine elliptical bearing. Background Technology

[0002] A steam turbine, also known as a steam engine, is a rotary steam power unit. High-temperature, high-pressure steam passes through a fixed nozzle, becomes an accelerated airflow, and is then injected onto blades, causing a rotor equipped with rows of blades to rotate and perform work. Steam turbines are the main equipment in modern thermal power plants and are also used in metallurgical industries, chemical industries, and ship propulsion systems. Sliding bearings are generally used under high-speed, heavy-load conditions, or in operating parts where maintenance and lubrication are difficult. Sliding bearings are typically used inside steam turbines.

[0003] like Figure 2 , Figure 3 As shown, the sliding bearing consists of an upper bearing shell and a lower bearing shell. During the processing, the two bearing shells need to be processed separately and then assembled together. Since there are several holes inside the upper and lower bearing shells and the bearing shells are arc-shaped, in the existing technology, corresponding molds need to be made to fix the upper and lower bearing shells separately. The fixing method is often by bolts. The bearing shell also has inclined holes I22 inside. The standard hole I needs to leave a gap after processing. During rough processing, hole I is directly processed with a drill bit. The size of hole I is difficult to control and brings great difficulties to the subsequent finishing process. At the same time, after drilling, multiple steps are required to separate the bearing shell and the fixture, which affects the processing time. Summary of the Invention

[0004] To address the technical problems existing in the background art, the purpose of this invention is to provide a drilling device for the split face of an elliptical bearing for a steam turbine, which facilitates the connection of the elliptical bearing. At the same time, the entire device can rotate, making it easy to adjust the position and reduce errors during processing.

[0005] To achieve the above objectives, the technical solution provided by the present invention is as follows:

[0006] A drilling device for the split surface of an elliptical bearing for a steam turbine includes an elliptical bearing comprising an upper bearing shell and a lower bearing shell that can be spliced ​​into a ring. The elliptical bearing is provided with a plurality of grooves and an opening inside. The elliptical bearing is provided with a split surface, which is respectively located at the connection position between the upper and lower bearing shells. The split surface is provided with a plurality of holes, including hole I which is inclined to the split surface. A drilling device is provided on the split surface.

[0007] The drilling device includes a support plate and a segmentation assembly. The support plate has several connecting holes aligned with the holes on the split surface. A slot is provided at the position of the aligned hole I on the support plate, and a connecting plate is provided above the slot. The segmentation assembly includes a segmentation frame and a drive structure. Connecting ports are provided on both sides of the segmentation frame, facing the slots. An inclined platform is provided inside the segmentation frame, with the inclined surface facing the connecting ports. Several shims are provided inside the inclined platform. The drive structure includes a support column and a rotating wheel rotatably connected below the support column. The support column passes through the segmentation frame and is slidably connected to the segmentation frame. The support column drives the rotating wheel to approach the shims, rubbing against the shims so that they slide out from the connecting ports into the slots. The drill bit extends into the connecting hole to drill the holes on the split surface.

[0008] Preferably, the support plate is provided with connecting hole I, connecting hole II, connecting hole III and connecting hole IV, with connecting hole I being directly opposite to hole I and inclined on the connecting plate.

[0009] Preferably, the holes are mirror-image arranged on the split surface. The holes also include pin holes, bolt holes I and II. Connecting holes II and I are aligned, connecting holes III and II are aligned, and connecting holes IV and pin holes are aligned.

[0010] Preferably, the drive structure further includes a gear, drive component I, and drive component II. Drive component I is disposed above the segmentation frame, the gear is connected to drive component I, a toothed block is disposed on the support column, the toothed block meshes with the gear, and drive component II is connected to the rotating wheel.

[0011] Preferably, clamping assemblies are provided on both sides of the support plate. The clamping assemblies include connecting rods and rotating blocks. The connecting rods surround one side of the support plate, and a certain interval is provided between the connecting rods and the support plate. The rotating blocks are rotatably disposed within the interval. Rotating holes are provided on both sides of the connecting rods, and rotating shafts are provided on both sides of the rotating blocks, with the rotating shafts extending into the rotating holes.

[0012] Preferably, a limiting groove is provided on the rotating shaft, a locking plate is provided in the rotating hole, a locking groove is provided on the locking plate, the limiting groove and the locking groove are aligned, a locking cap is detachably provided in the rotating hole, and a protrusion is provided on the locking cap. The protrusion extends into the limiting groove and the locking groove to fix the rotating block and the connecting rod.

[0013] Preferably, partition I and partition II are provided on both sides of the slitting frame, and there is a certain distance between partition I, partition II and the inclined platform. A material inlet is provided between partition I and the slitting frame, and a support hole is provided above partition II.

[0014] Preferably, the bottom of partition II is open, and a sliding assembly is provided inside partition II. The sliding assembly includes a retaining plate and a top rod connected to the retaining plate. The retaining plate is slidably disposed inside partition II and can extend from the bottom of partition II. The top rod is slidably disposed in a support hole. A spring is provided between partition II and retaining plate.

[0015] Preferably, the support plate is provided with protruding plates around its perimeter, and driving components III for driving the support plate to move are respectively provided below the protruding plates.

[0016] Preferably, a detection block is provided at the bottom of the support plate, and the detection block is connected inside the opening.

[0017] The present invention has the following advantages and beneficial effects:

[0018] I. In this invention, several holes are pre-made on the support plate, and the positions of the holes to be machined in the elliptical bearing are the same. When the support plate is connected to the split surface, the drill bit can directly machine the holes without complicated alignment and positioning. At the same time, the shape of the detection block is consistent with the shape of the opening. When the detection block is first connected in the opening, the roundness of the opening can be detected, and the size of the elliptical bearing can be preliminarily judged.

[0019] Second, in this invention, a shim is placed before drilling hole I, which can obtain hole I with a certain preload coefficient, which is convenient for subsequent fine processing. The shim slides out from both sides into the empty groove through the split assembly. The empty groove limits the shim and prevents it from sliding during processing and covering the other holes.

[0020] Third, the present invention has a simple structure and is easy to operate. The four cylinders are set below the support plate. Adjusting the cylinders changes the position of the support plate, which facilitates the installation of the elliptical bearing and makes its processing more accurate. Attached Figure Description

[0021] Figure 1 A three-dimensional drawing of a drilling device for the split surface of an elliptical bearing for a steam turbine, provided by the present invention;

[0022] Figure 2 A schematic diagram of an elliptical bearing structure for a split-face drilling device for a steam turbine elliptical bearing provided by the present invention;

[0023] Figure 3 This invention provides a schematic diagram of the split-face structure of a drilling device for the split-face of an elliptical bearing in a steam turbine.

[0024] Figure 4 A top view of a drilling device for a split-face drilling device of an elliptical bearing for a steam turbine, provided by the present invention;

[0025] Figure 5This is a cross-sectional view of a segmented assembly of a split-face drilling device for an elliptical bearing of a steam turbine, provided by the present invention.

[0026] Figure 6 A cross-sectional view of the clamping plate of a drilling device for the split surface of an elliptical bearing of a steam turbine provided by the present invention;

[0027] Figure 7 This invention provides a diagram showing the state of an elliptical bearing not being connected to a drilling device for the split surface of a steam turbine elliptical bearing when the elliptical bearing is not in use.

[0028] Figure 8 A schematic diagram of the clamping assembly structure of a drilling device for the split surface of an elliptical bearing for a steam turbine provided by the present invention;

[0029] Figure 9 A schematic diagram of the rotating block structure of a split-face drilling device for an elliptical bearing of a steam turbine provided by the present invention;

[0030] Figure 10 A cross-sectional view of one side of a turbine elliptical bearing split-face drilling device provided by the present invention, without the locking cap connected;

[0031] Figure 11 A schematic diagram of the locking cap structure of a drilling device for the split surface of an elliptical bearing for a steam turbine provided by the present invention;

[0032] Figure 12 A schematic diagram of the segment frame structure of a split-face drilling device for an elliptical bearing of a steam turbine provided by the present invention;

[0033] Figure 13 A schematic diagram of the drive structure of a drilling device for the split surface of an elliptical bearing for a steam turbine provided by the present invention;

[0034] Icons: 1-Elliptical bearing, 101-Upper bearing shell, 102-Lower bearing shell, 2-Split surface, 21-Slot, 22-Hole I, 23-Bolt hole I, 24-Bolt hole II, 25-Pin hole, 26-Opening, 3-Support plate, 31-Connecting plate, 32-Connecting hole I, 33-Connecting hole II, 34-Connecting hole III, 35-Connecting hole IV, 36-Groove, 37-Detection block, 4-Clamping assembly, 41-Connecting rod, 411-Rotating hole, 412-Locking plate, 413-Locking groove, 42 - Rotating block, 421- Rotating shaft, 422- Limiting groove, 43- Lock cap, 431- Protrusion, 5- Segment assembly, 51- Segment frame, 52- Partition I, 53- Partition II, 531- Support hole, 54- Inclined platform, 55- Connection port, 56- Material port, 6- Drive structure, 61- Support column, 611- Tooth block, 62- Rotating wheel, 63- Gear, 64- Motor II, 65- Motor I, 7- Clamping plate, 71- Top rod, 72- Spring, 8- Washer, 9- Protrusion plate, 91- Cylinder. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0036] Therefore, the following detailed description of the embodiments of the 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 invention without inventive effort are within the scope of protection of the invention.

[0037] Example

[0038] like Figure 1-3 As shown, a drilling device for the split surface of an elliptical bearing for a steam turbine includes an elliptical bearing 1. The elliptical bearing 1 includes an upper bearing shell 101 and a lower bearing shell 102 that can be spliced ​​into a ring. The elliptical bearing 1 is provided with a plurality of slots 21. The elliptical bearing 1 has an opening 26 inside. The elliptical bearing 1 is provided with a split surface 2, which is respectively located at the connection position between the upper bearing shell 101 and the lower bearing shell 102. The split surface 2 is provided with a plurality of holes, which are mirrored on the split surface 2. The holes include a hole I 22 that is inclined to the split surface 2, and the holes also include a pin hole 25, a bolt hole I 23 and a bolt hole II 24. A drilling device is provided on the split surface 2.

[0039] like Figure 1 , 4 As described in sections 5 and 7, the drilling device includes a support plate 3 and a segmented assembly 5. The support plate 3 is provided with several connecting holes, including connecting hole I 32, connecting hole II 33, connecting hole III 34 and connecting hole IV 35. Connecting hole II 33 is aligned with bolt hole I 23, connecting hole III 34 is aligned with bolt hole II 24, and connecting hole IV 35 is aligned with pin hole 25. Connecting holes I 32, II 33, III 34 and IV 35 are pre-drilled holes that penetrate the support plate 3. A slot 36 is provided on the support plate 3 at the position aligned with hole I 22. A connecting plate 31 is provided above the slot 36. Connecting hole I 32 is provided on the connecting plate 31 and has the same angle as hole I 22. When the support plate 3 is aligned and close to the split surface 2, the position of the connecting hole is the drilling position of the split surface 2. The processing position can be positioned by the support plate 3, eliminating the need for secondary positioning in traditional methods, reducing processing time, and increasing processing accuracy.

[0040] like Figure 1 , 2As shown in figures 3, 4, 7, 8, 9, 10, and 11, clamping assemblies 4 are provided on both sides of the support plate 3. Each clamping assembly 4 includes a connecting rod 41 and a rotating block 42. The lower end of the rotating block 42 has the same shape as the slot 21. The connecting rod 41 surrounds one side of the support plate 3, and a certain gap is provided between the connecting rod 41 and the support plate 3. The rotating block 42 is rotatably positioned within this gap. Rotating holes 411 are provided on both sides of the connecting rod 41, and rotating shafts 421 are provided on both sides of the rotating block 42. The rotating shafts 421 extend into the rotating holes 411. When the rotating block 42 rotates toward the slot 21, the bottom of the rotating block 42 can extend into the slot 21, causing the clamping assembly 4 to clamp the upper bearing 101 or the lower bearing 102. A limit groove 422 is provided on the rotating shaft 421, and a locking plate 412 is provided inside the rotating hole 411. The locking plate 412 has a... A locking groove 413 is provided, and the limiting groove 422 and the locking groove 413 are aligned. A locking cap 43 is detachably provided in the rotating hole 411. A protrusion 431 is provided on the locking cap 43. The protrusion 431 extends into the limiting groove 422 and the locking groove 413 to fix the rotating block 42 and the connecting rod 41. When the limiting groove 422 and the locking groove 413 are aligned, the bottom of the rotating block 42 extends into the slot 21, and the locking cap 43 locks the rotating block 42 to prevent the rotating block 42 from disengaging from the slot 21. When the locking cap 43 is removed, the locking of the rotating block 42 is released, and the rotating block 42 separates from the slot 21. This method of fixing the upper bearing 101 or the lower bearing 102 is not only convenient for disassembly and assembly, but also eliminates the need for multiple clamping devices to fix the elliptical bearing 1 as in traditional methods. It can protect most of the surfaces of the elliptical bearing 1 and avoid pressure during processing.

[0041] like Figure 1 , 4As shown in Figures 5, 6, 7, and 12, the segmentation assembly 5 includes a segmentation frame 51 and a drive structure 6. The segmentation frame 51 has connection ports 55 on both sides facing the empty slots 36. An inclined platform 54 is provided inside the segmentation frame 51, with its inclined surface facing the connection ports 55. Several gaskets 8 are placed on the inclined platform 54. Partition plates I 52 and II 53 are provided on both sides of the segmentation frame 51, with a certain distance between partition plates I 52, II 53, and the inclined platform 54, allowing the gaskets 8 to slide out within the distance. A material inlet 56 is provided between partition plate I 52 and the segmentation frame 51, penetrating into the segmentation frame 51. When filling with gaskets 8, simply insert the gaskets 8 through the material inlet 56. A support hole 531 is provided above partition plate II 53, and the bottom of partition plate II 53 is through-hole. A sliding component is provided inside partition plate II 53. The sliding assembly includes a retaining plate 7 and a push rod 71 connected to the retaining plate 7. The retaining plate 7 is slidably disposed inside the partition plate II 53 and can extend from the bottom of the partition plate II 53. The push rod 71 is slidably disposed in the support hole 531. A spring 72 is disposed between the partition plate II 53 and the retaining plate 7. When filling the gasket 8 from the material port 56, some of the gasket 8 will slide out from the bottom of the partition plate II 53. To avoid this situation, the sliding assembly is designed. When filling, the push rod 71 is pressed down, the spring 72 is stretched, and the push rod 71 drives the retaining plate 7 to slide inside the partition plate II 53. The retaining plate 7 extends out from the partition plate II 53 and contacts the inclined platform 54 to prevent the gasket 8 from sliding out during the filling process. At the same time, the retaining plate 7 can also align the gasket 8. When the filling is completed, the push rod 71 is released, the spring 72 returns to its original position and pulls the retaining plate 7 back to its initial position.

[0042] like Figure 1 , 4As shown in Figures 5, 7, 12, and 13, the drive structure 6 includes a support column 61 and a rotating wheel 62 rotatably connected below the support column 61. The drive structure 6 is positioned above the segmentation frame 51. The support column 61 passes through the segmentation frame 51 and is slidably connected to it. The support column 61 is directly opposite the location of the pad 8. The drive structure 6 also includes a gear 63, a drive component I, and a drive component II. Drive component I and drive component II are motor I 65 and motor II 64, respectively. Motor II 64 is positioned above the segmentation frame 51. The gear 63 is connected to motor II 64, and motor II 64 drives the gear 63 to rotate. A toothed block 611 is provided on the support column 61, and the toothed block 611 meshes with the gear 63. When motor II 64 rotates forward, support column 61 gradually extends into the segmentation frame 51. When motor II 64 rotates in reverse, support column 61 extends above segmentation frame 51. Motor I 65 connects with wheel 62 and drives wheel 62 to rotate. The rotation direction of wheel 62 aligns with hole I 22. Support column 61 drives wheel 62 to approach pad 8. Similarly, when motor I 65 rotates forward, wheel 62 contacts and rubs pad 8, causing it to slide out from connection port 55 on one side into empty slot 36. When motor I 65 rotates in reverse, wheel 62 contacts and rubs pad 8, causing it to slide out from connection port 55 on the other side into empty slot 36 and fall onto the middle split surface 2.

[0043] The shim 8 is placed when machining hole I22 because the drill bit contacts the shim 8 first during drilling. Since the drill bit is irregularly shaped, the shim 8 absorbs the initial irregular force of the drill bit and stabilizes it, making it more accurate when drilling into the centering surface 2. At the same time, hole I22 requires a certain gap during machining. When the shim 8 is drilled through, part of the shim 8 around the drill bit provides support, resulting in a certain gap after machining hole I22, which is smaller than the standard hole size, meeting the machining size requirements. This makes subsequent finishing easier and makes it easier to machine standard-sized holes I22. The shim 8 is placed in the slot 36. The slot 36 not only limits the shim 8 to prevent it from sliding during machining, but also provides a pre-made connecting hole I32 on the connecting plate 31. The drill bit can directly extend into the connecting hole I32, which not only ensures machining accuracy but also does not affect the installation of the shim 8.

[0044] like Figure 1 , 4 As shown in Figure 7, the support plate 3 is provided with protruding plates 9 around its perimeter. Below the protruding plates 9, there are driving components Ⅲ for driving the support plate 3 to move. In this design, the driving component Ⅲ is a cylinder 91, but it can also be other telescopic components. When the cylinders 91 are raised at the same time, the support plate 3 is raised, which makes it easier to place the elliptical bearing at the lower end of the support plate 3 without moving the entire support plate 3, making positioning more convenient.

[0045] like Figure 1 , 7As shown, a detection block 37 is provided at the bottom of the support plate 3. The shape of the detection block 37 is the same as that of the opening 26. When the support plate 3 is placed on the split surface 2, the detection block 37 can be connected inside the opening 26. This not only allows the size of the opening 26 to be detected during installation, but the detection block 37 can also cooperate with the clamping component 4 inside the opening 26 to make the upper bearing 101 or the lower bearing 102 more stable.

[0046] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A drilling device for the split surface of an elliptical bearing for a steam turbine, comprising an elliptical bearing, the elliptical bearing including an upper bearing shell and a lower bearing shell that can be spliced ​​into a ring, the elliptical bearing having a plurality of grooves, the elliptical bearing having an opening inside, the elliptical bearing having a split surface, the split surface being respectively disposed at the connection position between the upper bearing shell and the lower bearing shell, the split surface having a plurality of holes, the holes including hole I disposed inclined to the split surface, characterized in that... A drilling device is provided on the split surface; The drilling device includes a support plate and a segmentation assembly. The support plate has several connecting holes, which are aligned with the holes on the split surface. A slot is provided at the position of the aligned hole I on the support plate. A connecting plate is provided above the slot. The segmentation assembly includes a segmentation frame and a drive structure. Connecting ports are provided on both sides of the segmentation frame, facing the slots. An inclined platform is provided inside the segmentation frame, with the inclined surface of the platform facing the connecting ports. Several shims are provided inside the inclined platform. The drive structure includes a support column and a rotating wheel rotatably connected below the support column. The support column passes through the segmentation frame and is slidably connected to the segmentation frame. The support column drives the rotating wheel to approach the shims, rubbing the shims so that they slide out from the connecting ports to the slots. The drill bit extends into the connecting hole to drill the holes on the split surface. Clamping assemblies are provided on both sides of the support plate. Each clamping assembly includes a connecting rod and a rotating block. The connecting rod surrounds one side of the support plate, and a certain gap is provided between the connecting rod and the support plate. The rotating block is rotatably disposed within the gap. Rotating holes are provided on both sides of the connecting rod, and rotating shafts are provided on both sides of the rotating block, with the rotating shafts extending into the rotating holes. The rotating shaft is provided with a limiting groove, the rotating hole is provided with a locking plate, the locking plate is provided with a locking groove, the limiting groove and the locking groove are aligned, the rotating hole is provided with a detachable locking cap, the locking cap is provided with a protrusion, the protrusion extends into the limiting groove and the locking groove to fix the rotating block and the connecting rod.

2. The drilling device for the split surface of an elliptical turbine bearing according to claim 1, characterized in that: The support plate is provided with connecting hole I, connecting hole II, connecting hole III and connecting hole IV, with connecting hole I being directly opposite to hole I and inclined on the connecting plate.

3. The drilling device for the split surface of an elliptical turbine bearing according to claim 2, characterized in that: The holes are mirror-image arranged on the split surface. The holes also include pin holes, bolt holes I and II. Connecting hole II and bolt hole I are aligned, connecting hole III and bolt hole II are aligned, and connecting hole IV and pin hole are aligned.

4. The drilling device for the split surface of an elliptical turbine bearing according to claim 1, characterized in that: The drive structure also includes a gear, drive component I and drive component II. Drive component II is disposed above the segmentation frame. The gear and drive component II are connected. A toothed block is disposed on the support column. The toothed block meshes with the gear. Drive component I is connected to the rotating wheel.

5. The drilling device for the split surface of an elliptical turbine bearing according to claim 1, characterized in that: The slitting frame is provided with partition I and partition II on both sides. There is a certain distance between partition I, partition II and the inclined platform. A material inlet is provided between partition I and the slitting frame. A support hole is provided above partition II.

6. The drilling device for the split surface of an elliptical turbine bearing according to claim 5, characterized in that: The bottom of the partition II is open, and a sliding assembly is provided inside the partition II. The sliding assembly includes a retaining plate and a top rod connected to the retaining plate. The retaining plate is slidably disposed inside the partition II and can extend from the bottom of the partition II. The top rod is slidably disposed in the support hole. A spring is provided between the partition II and the retaining plate.

7. The drilling device for the split surface of an elliptical turbine bearing according to claim 1, characterized in that: The support plate is provided with protruding plates around its perimeter, and driving components III for driving the support plate to move are respectively provided below the protruding plates.

8. The drilling device for the split surface of an elliptical turbine bearing according to claim 1, characterized in that: A detection block is provided at the bottom of the support plate, and the detection block is connected to the opening.

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