A triangular block welding structure for reinforcing a runner blade of a hydraulic turbine

Abstract

The utility model relates to the technical field of water turbine, concretely relates to a triangular block welding structure for reinforcing water turbine runner blade, including mounting frame, still including installation component, installation component includes positioning stand, connecting frame, mounting plate, blade, abutting cover and connecting member, the positioning stand sets up on the mounting frame, connecting frame is fixedly connected with the positioning stand, the mounting plate is fixedly connected with the connecting frame, the blade is fixedly connected with the mounting plate, the abutting cover is connected with the mounting frame through connecting member, and connecting member sets up on the mounting frame, and is connected with the abutting cover, and the abutting locking of positioning stand is removed abutting cover through connecting member, and then can carry out the slide replacement of the damaged blade among the multiple blades connected on multiple positioning stands, thereby facilitate the operator to the separate disassembly replacement of damaged blade, and then reduce the maintenance cost of blade.

Description

Technical Field

[0001] This utility model relates to the field of water turbine technology, and in particular to a triangular block welding structure for reinforcing water turbine runner blades. Background Technology

[0002] All impeller blades have a smooth surface structure. They rotate when impacted by water flow during operation, converting the potential or kinetic energy of the fluid into mechanical or electrical energy. However, traditional blades will wear out after prolonged use.

[0003] The existing blades feature a uniquely shaped triangular block with drainage grooves at the connection between the blade and the upper crown. The triangular block has honeycomb-shaped weight-reducing holes and a pre-installed stainless steel liner. The stepped bevel design during welding reduces residual stress by 30% and increases the fatigue life of the reinforced area to 120,000 hours. This technology is suitable for the repair of runners in high-head mixed-flow turbines.

[0004] Even after prolonged use, blades will still suffer irreversible wear and need to be replaced. However, it is difficult to disassemble and replace a single worn blade from the existing multiple blades, which increases the overall maintenance cost of the device. Utility Model Content

[0005] The purpose of this invention is to provide a triangular block welding structure for reinforcing turbine runner blades, which solves the problem that it is difficult to disassemble and replace a single worn blade among multiple blades, thereby increasing the overall maintenance cost of the device.

[0006] To achieve the above objectives, this utility model provides a triangular block welding structure for reinforcing turbine runner blades, including a mounting bracket. It also includes installation components; The mounting assembly includes a positioning frame, a connecting frame, a mounting plate, blades, an abutment cover, and a connecting member. The positioning frame is disposed on the mounting frame and located on one side of the mounting frame. The connecting frame is fixedly connected to the positioning frame and located on one side of the positioning frame. The mounting plate is fixedly connected to the connecting frame and located on the side of the connecting frame away from the positioning frame. The blades are fixedly connected to the mounting plate and located on one side of the mounting plate. The abutment cover is connected to the mounting frame through the connecting member and located on the side of the mounting frame closer to the positioning frame. The connecting member is disposed on the mounting frame and connected to the abutment cover.

[0007] The connecting component includes a threaded bracket and a connecting cover. The threaded bracket is connected to the mounting bracket and is located on one side of the mounting bracket. The connecting cover is fixedly connected to both the threaded bracket and the abutment cover and is located on the side of the threaded bracket closer to the abutment cover.

[0008] The mounting bracket has a threaded groove located on the side of the mounting bracket close to the threaded frame and engaging with the threaded frame.

[0009] The mounting bracket also has a positioning groove, which is located on the side of the mounting bracket close to the positioning frame and cooperates with the positioning frame.

[0010] The mounting assembly also includes a rubber pad, which is fixedly connected to the abutment cover and located on one side of the abutment cover.

[0011] This utility model discloses a triangular block welding structure for reinforcing turbine runner blades. When multiple blades need to be installed, the positioning frame on the blade is slid into the mounting frame, and the movement of the positioning frame is locked by installing the abutment cover. When a damaged blade needs to be replaced, the abutment cover is opened, and the positioning frame on the corresponding damaged blade is slid out of the mounting frame. The abutment cover is then removed by the connecting member to lock the positioning frame, allowing the damaged blade among the multiple blades connected to the multiple positioning frames to be slid out and replaced. This facilitates the operator to disassemble and replace the damaged blade individually, thereby reducing the maintenance cost of the blades. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0013] Figure 1 This is a schematic diagram of the triangular block welding structure for reinforcing turbine runner blades according to this utility model.

[0014] Figure 2 This is a schematic diagram of the installation component of this utility model.

[0015] Figure 3 This is a structural schematic diagram of the mounting bracket of this utility model.

[0016] Figure 4 This is a structural schematic diagram of the connecting component of this utility model.

[0017] In the diagram: 101-mounting bracket, 102-positioning bracket, 103-connecting bracket, 104-mounting plate, 105-blade, 106-abutment cover, 107-rubber pad, 108-threaded bracket, 109-connecting cover, 110-threaded surface, 111-positioning groove. Detailed Implementation

[0018] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0019] Please see Figures 1-4 ,in Figure 1 This is a schematic diagram of the triangular block welding structure for reinforcing turbine runner blades according to this utility model. Figure 2 This is a schematic diagram of the installation component of this utility model. Figure 3 This is a structural schematic diagram of the mounting bracket of this utility model. Figure 4 This is a structural schematic diagram of the connecting component of this utility model.

[0020] This utility model provides a triangular block welding structure for reinforcing turbine runner blades 105, including a mounting frame 101 and a mounting assembly. The mounting assembly includes a positioning frame 102, a connecting frame 103, a mounting plate 104, a blade 105, an abutment cover 106, a connecting component, and a rubber pad 107. The connecting component includes a threaded frame 108 and a connecting cover 109. The mounting frame 101 has a threaded surface 110 and a positioning groove 111. This solution addresses the difficulty of disassembling and replacing a single worn blade from a group of blades, thus reducing the overall maintenance cost of the device.

[0021] In this embodiment, there are multiple blades 105, which are mounted on the mounting frame 101. By setting an irregularly shaped triangular block with a drainage groove at the connection between the blade 105 and the upper crown, the triangular block is provided with a honeycomb-shaped weight reduction hole and a pre-installed stainless steel liner. The stepped bevel design is adopted during welding, which reduces the residual stress after welding by 30% and increases the fatigue life of the reinforced area to 120,000 hours. This is suitable for the repair of high-head mixed-flow turbine runners.

[0022] The positioning frame 102 is disposed on the mounting frame 101 and located on one side of the mounting frame 101. The connecting frame 103 is fixedly connected to the positioning frame 102 and located on one side of the positioning frame 102. The mounting plate 104 is fixedly connected to the connecting frame 103 and located on the side of the connecting frame 103 away from the positioning frame 102. The blade 105 is fixedly connected to the mounting plate 104 and located on one side of the mounting plate 104. The abutment cover 106 is connected to the mounting frame 101 through the connecting member and located on the side of the mounting frame 101 closer to the positioning frame 102. The connecting components are disposed on the mounting bracket 101 and connected to the abutment cover 106. Multiple positioning brackets 102 are provided, each capable of sliding into a corresponding position on the mounting bracket 101. Multiple connecting brackets 103 are provided, welded to corresponding positioning brackets 102. Multiple mounting plates 104 are provided, welded to corresponding connecting brackets 103. The positioning brackets 102 and connecting brackets 103 connect and fix the mounting plates 104 to the mounting bracket 101. Multiple blades 105 are welded to corresponding... The mounting plate 104 allows multiple blades 105 to be connected and fixed to the mounting frame 101. The abutment cover 106 is detachably connected and fixed to the mounting frame 101 via the connecting member. The abutment cover 106 can lock the sliding of the positioning frame 102 within the mounting frame 101. The connecting member is disposed on the mounting frame 101 and connected to the abutment cover 106, thereby enabling the positioning frame 102 on the blade 105 to slide into the mounting frame 101 when multiple blades 105 need to be installed, and the installation... The abutment cover 106 locks the movement of the positioning frame 102. When a damaged blade 105 needs to be replaced, the abutment cover 106 is opened, and the positioning frame 102 on the corresponding damaged blade 105 is slid out from the mounting frame 101. This allows the abutment cover 106 to remove the locking mechanism of the positioning frame 102 through the connecting member. This enables the damaged blade 105 among the multiple blades 105 connected to the multiple positioning frames 102 to be slid out and replaced. This facilitates the operator to disassemble and replace the damaged blade 105 individually, thereby reducing the maintenance cost of the blade 105.

[0023] Secondly, the threaded bracket 108 is connected to the mounting bracket 101 and is located on one side of the mounting bracket 101; the connecting cover 109 is fixedly connected to the threaded bracket 108 and the abutment cover 106 respectively, and is located on the side of the threaded bracket 108 near the abutment cover 106; the threaded groove is located on the side of the mounting bracket 101 near the threaded bracket 108 and cooperates with the threaded bracket 108. The threaded bracket 108 has an external thread, and the mounting bracket 101 has a threaded groove. The threaded groove has a thread that cooperates with the external thread of the threaded bracket 108. By turning the threaded bracket 108, the threaded bracket 108 can be detachably connected and fixed to the mounting bracket 101. The connecting cover 109 is welded to the threaded bracket 108 and the abutment cover 106, so that the abutment cover 106 can be connected and fixed to the mounting bracket 101 through the connection of the threaded bracket 108.

[0024] Meanwhile, the positioning groove 111 is located on the side of the mounting bracket 101 close to the positioning bracket 102 and cooperates with the positioning bracket 102. There are multiple positioning grooves 111, and the openings of the multiple positioning grooves 111 face the positioning bracket 102. The positioning grooves 111 can achieve the purpose of positioning the positioning bracket 102 and sliding it into the mounting bracket 101.

[0025] Finally, the rubber pad 107 is fixedly connected to the abutment cover 106 and is located on one side of the abutment cover 106. The rubber pad 107 is adhered to the underside of the abutment cover 106. The rubber pad 107 can improve the sealing performance of the abutment cover 106 when it abuts against the mounting bracket 101, and at the same time, the friction provided by the rubber pad 107 can prevent the abutment cover 106 from loosening when it abuts.

[0026] When using the triangular block welding structure for reinforcing turbine runner blades 105 according to this embodiment, when multiple blades 105 need to be installed, the positioning frame 102 on the blade 105 is slid into the mounting frame 101, and the movement of the positioning frame 102 is locked by installing the abutment cover 106. When a damaged blade 105 needs to be replaced, the abutment cover 106 is opened, and the positioning frame 102 on the corresponding damaged blade 105 is slid out from the mounting frame 101. Thus, the abutment cover 106 is removed by the connecting member to lock the positioning frame 102, thereby enabling the damaged blade 105 among the multiple blades 105 connected to the multiple positioning frames 102 to be slid out and replaced. This facilitates the operator to disassemble and replace the damaged blade 105 individually, thereby reducing the maintenance cost of the blade 105.

[0027] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that implementing all or part of the above embodiments and making equivalent changes in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A triangular block welding structure for reinforcing turbine runner blades, comprising a mounting bracket, characterized in that, It also includes installation components; The mounting assembly includes a positioning frame, a connecting frame, a mounting plate, blades, an abutment cover, and a connecting member. The positioning frame is disposed on the mounting frame and located on one side of the mounting frame. The connecting frame is fixedly connected to the positioning frame and located on one side of the positioning frame. The mounting plate is fixedly connected to the connecting frame and located on the side of the connecting frame away from the positioning frame. The blades are fixedly connected to the mounting plate and located on one side of the mounting plate. The abutment cover is connected to the mounting frame through the connecting member and located on the side of the mounting frame closer to the positioning frame. The connecting member is disposed on the mounting frame and connected to the abutment cover.

2. The triangular block welding structure for reinforcing turbine runner blades as described in claim 1, characterized in that, The connecting component includes a threaded bracket and a connecting cover. The threaded bracket is connected to the mounting bracket and is located on one side of the mounting bracket. The connecting cover is fixedly connected to both the threaded bracket and the abutment cover and is located on the side of the threaded bracket closer to the abutment cover.

3. The triangular block welding structure for reinforcing turbine runner blades as described in claim 2, characterized in that, The mounting bracket has a threaded groove located on the side of the mounting bracket close to the threaded bracket and engaging with the threaded bracket.

4. The triangular block welding structure for reinforcing turbine runner blades as described in claim 1, characterized in that, The mounting bracket also has a positioning groove located on the side of the mounting bracket close to the positioning frame and engaging with the positioning frame.

5. The triangular block welding structure for reinforcing turbine runner blades as described in claim 1, characterized in that, The mounting assembly also includes a rubber pad, which is fixedly connected to the abutment cover and located on one side of the abutment cover.

Images