Fracture repairing device for eccentric pin boss of steam turbine cylinder
By designing repair devices for top reinforcement plates, side reinforcement plates, positioning plates and reinforcement ribs, the problem of eccentric pin seat of the turbine cylinder is solved, the maintenance cycle is shortened, the equipment is overhauled, and the unit is safe and stable run.
Patent Information
- Application Number
- CN202421113701.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-21
- Publication Date
- 2025-01-17
- Estimated Expiration
- 2034-05-21
AI Technical Summary
The eccentric pin seat of the turbine cylinder breaks and increases the vibration of the equipment, endangering safety and forcing the equipment to overhaul. The existing technology cannot effectively solve the fracture repair, resulting in the extended equipment maintenance cycle and economic losses.
A repair device including a top reinforcement plate, a side reinforcement plate, a positioning plate and a reinforcement tensioning rib is designed to re-fix the cylinder expansion dead point through these components to avoid breaking and expanding the eccentric pin seat, and ensure that the dynamic and static clearance meets the operating requirements.
It effectively avoids the expansion of the eccentric pin break of the cylinder, shortens the maintenance period, reduces the equipment overhaul cycle, saves spare parts procurement and construction time, and ensures the safe and stable operation of the unit.
Smart Images
Figure CN222359612U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a device for repairing a broken eccentric pin seat of a steam turbine cylinder. Background Art
[0002] The eccentric pin seat connecting the turbine cylinder and the bearing seat is the expansion dead point of the cylinder. Its main function is to adjust and fix the axial and radial position of the turbine cylinder to prevent the displacement of the turbine cylinder, which would cause friction between the moving and static parts of the turbine. As we all know, once the moving and static parts of the turbine collide, the vibration of the unit shaft system will increase, endangering the safety of the equipment and even directly causing damage to the equipment. The eccentric pin seat on the side of the bearing seat that broke this time is an integrated casting structure. The crack is horizontally fractured based on the center of the pin hole. Due to the working environment, the quality of the welding operation cannot be guaranteed. If the construction is carried out according to the process of replacing the bearing seat, the spare parts procurement and construction cycle must be 2-3 months, forcing the equipment overhaul cycle to be advanced, resulting in significant economic losses. Utility Model Content
[0003] In view of the above problems, the utility model provides a device for repairing a fractured eccentric pin seat of a steam turbine cylinder.
[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a device for repairing the fracture of an eccentric pin seat of a turbine cylinder, comprising a connection between a turbine cylinder and a bearing seat via an eccentric pin seat, the eccentric pin seat comprising a cylinder side eccentric pin seat connected to the turbine cylinder and a bearing seat side eccentric pin seat connected to the bearing seat, the top reinforcing plate and the cylinder side eccentric pin seat are connected via an eccentric pin, a top reinforcing plate is fixedly connected to a side of the cylinder side eccentric pin seat away from the bearing seat side eccentric pin seat, side reinforcing plates are fixedly connected to the front and rear sides of the cylinder side eccentric pin seat respectively, the two side reinforcing plates extend respectively toward the direction of the middle beam seat of the bearing seat, the tails of the two side reinforcing plates are fastened together by a positioning plate, and an adjusting screw is threadedly connected to the positioning plate.
[0005] Preferably, the side reinforcement plate and the cylinder side eccentric pin seat are fastened together by a pin.
[0006] Preferably, a reinforcing tie bar is further provided between the middle parts of the two side reinforcing plates, and the reinforcing tie bar is fastened to the two side reinforcing plates by reinforcing tie bar bolts.
[0007] Preferably, the side reinforcement plates, top reinforcement plates, positioning plates and reinforcement tie bars are all made of steel plates.
[0008] Preferably, an adjustment gasket is provided between the inner side surface of each of the side reinforcement plates and the side wall of the middle beam seat of the bearing seat.
[0009] Preferably, each of the side reinforcement plates is fastened to the positioning plate by a fastening bolt 7. From the above description of the structure of the utility model, it can be seen that compared with the prior art, the utility model has the following advantages:
[0010] The utility model provides a device for repairing the fracture of an eccentric pin seat of a steam turbine cylinder. The device is designed to be composed of a top reinforcement plate, a side reinforcement plate, a positioning plate, a reinforcement tie rod and an adjusting screw. That is, the expansion dead point of the cylinder expansion is re-fixed by making the fracture repair device, so that the expansion of the fracture of the eccentric pin seat of the steam turbine cylinder can be avoided, and the clearance between the dynamic and static parts of the steam turbine can be guaranteed to meet the operation requirements. Thus, the problem that the eccentric pin seat of the steam turbine cylinder is found to be fractured during the maintenance process in the prior art and the steam turbine must be disassembled if the spare parts are replaced, forcing the equipment overhaul cycle to be advanced and the long construction period affecting the production of the unit can be avoided, thereby saving the maintenance period. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:
[0012] Figure 1 This is a front view of a device for repairing a broken eccentric pin seat of a steam turbine cylinder according to the utility model;
[0013] Figure 2 The utility model is a top view of a device for repairing a broken eccentric pin seat of a steam turbine cylinder. DETAILED DESCRIPTION
[0014] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0015] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model 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 cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.
[0016] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.
[0017] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.
[0018] Example
[0019] refer to Figure 1 and Figure 2 A device for repairing a fractured eccentric pin seat of a steam turbine cylinder, comprising a connection between a steam turbine cylinder and a bearing seat via an eccentric pin seat, the eccentric pin seat comprising a cylinder side eccentric pin seat 11 connected to the steam turbine cylinder and a bearing seat side eccentric pin seat 21 connected to the bearing seat, a top reinforcing plate 31 and the cylinder side eccentric pin seat 11 are connected via an eccentric pin 4, a top reinforcing plate 31 is fixedly connected to a side of the cylinder side eccentric pin seat 11 away from the bearing seat side eccentric pin seat 21, side reinforcing plates 32 are fixedly connected to the front and rear sides of the cylinder side eccentric pin seat 11, the two side reinforcing plates 32 extend respectively in the direction of the middle beam seat 22 of the bearing seat, and the tails of the two side reinforcing plates 32 are connected to each other. It is fastened through a positioning plate 33, on which an adjusting screw 34 is threaded; the side reinforcement plate 32 and the cylinder side eccentric pin seat 11 are fastened through a pin 5; a reinforcing rib 35 is also provided between the middle parts of the two side reinforcement plates 32, and the reinforcing rib 35 and the two side reinforcement plates 32 are fastened through a reinforcing rib bolt 6; each side reinforcement plate 32 is fastened to the positioning plate 33 through a fastening bolt 7; the side reinforcement plate 32, the top reinforcement plate 31, the positioning plate 33 and the reinforcing rib 35 are all made of steel plates; an adjusting gasket 36 is also provided between the inner side surface of each side reinforcement plate 32 and the side wall of the middle beam seat 22 of the bearing seat. By adopting this structure, a fracture repair device composed of a top reinforcement plate 31, a side reinforcement plate 32, a positioning plate 33, a reinforcement tie rod 35 and an adjusting screw 34 is designed. That is, by making a fracture repair device to re-fix the cylinder expansion dead point, the expansion of the fracture of the eccentric pin seat 11 on the cylinder side of the turbine can be avoided, and the clearance between the dynamic and static parts of the turbine can be guaranteed to meet the operating requirements. This can overcome the problem of the prior art that the eccentric pin seat of the turbine cylinder is found to be broken during the maintenance process. If the spare parts are replaced, the turbine must be dismantled, forcing the equipment overhaul cycle to be advanced, and the long construction period affects the production of the unit, thereby saving the maintenance period.
[0020] When in use, the side reinforcement plates 32 made of 50mm thick steel plates on both sides of the cylinder side eccentric pin seat 11 are connected to the middle beam seat 22 of the bearing seat, holes are drilled on the side reinforcement plates 32, both sides of the cylinder side eccentric pin seat 11 and both sides of the positioning plate 33, and then the two side reinforcement plates 32 and the cylinder side eccentric pin seat 11, and the two side reinforcement plates 32 and the positioning plate 33 are fixed respectively with Φ30mm pins 5 and M30 fastening bolts 7, and the top reinforcement plate 31, the side reinforcement plate 32 and the positioning plate 33 are connected by welding, pins 5 and fastening bolts 7 to form a whole, and an M30 adjusting screw 34 is installed on the positioning plate 33 and the middle beam seat 22 of the bearing seat. By adjusting the adjusting screw 34, its preload force is increased to ensure that the cylinder no longer moves, and to ensure that the unit is put into safe and stable operation and production.
[0021] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A device for repairing the fracture of an eccentric pin seat of a steam turbine cylinder, comprising a steam turbine cylinder and a bearing seat connected via an eccentric pin seat, characterized in that: The eccentric pin seat includes a cylinder side eccentric pin seat connected to the turbine cylinder and a bearing seat side eccentric pin seat connected to the bearing seat. The top reinforcing plate and the cylinder side eccentric pin seat are connected by an eccentric pin. A top reinforcing plate is fixedly connected to the side of the cylinder side eccentric pin seat away from the bearing seat side eccentric pin seat. Side reinforcing plates are fixedly connected to the front and rear sides of the cylinder side eccentric pin seat respectively. The two side reinforcing plates extend toward the direction of the middle beam seat of the bearing seat respectively. The tails of the two side reinforcing plates are fastened together by a positioning plate, and an adjusting screw is threadedly connected to the positioning plate.
2. A steam turbine cylinder eccentric pin seat fracture repair device according to claim 1, characterized in that: The side reinforcement plate and the cylinder side eccentric pin seat are fastened and connected via pins.
3. A steam turbine cylinder eccentric pin seat fracture repair device according to claim 1, characterized in that: A reinforcing tie bar is also provided between the middle parts of the two side reinforcing plates, and the reinforcing tie bar is fastened to the two side reinforcing plates by reinforcing tie bar bolts.
4. A steam turbine cylinder eccentric pin seat fracture repair device according to claim 3, characterized in that: The side reinforcement plates, top reinforcement plates, positioning plates and reinforcement tie bars are all made of steel plates.
5. The device for repairing the fracture of the eccentric pin seat of a steam turbine cylinder according to claim 1, characterized in that: An adjusting gasket is also arranged between the inner side surface of each side reinforcement plate and the side wall of the middle beam seat of the bearing seat.
6. A steam turbine cylinder eccentric pin seat fracture repair device according to claim 1, characterized in that: Each of the side reinforcement plates is fastened to the positioning plate by fastening bolts.