A low additional bending moment welded membrane disc coupling structure

Abstract

The utility model relates to a kind of low additional bending moment welding film disc coupling structure, including axle, and axle both sides are connected by flexible film disc group installation disc;Flexible film disc group includes flexible film disc and adapter disc, adapter disc is connected with axle by transmission bolt and self-locking nut, and adapter disc is connected with installation disc by flexible film disc;Flexible film disc is connected installation disc and adapter disc by vacuum electron beam welding process, and flexible film disc inner circumferential end portion is equipped with flexible inner welding surface.The utility model is connected by welding instead of bolt, effectively reduce the weight of coupling;While by flexible film disc close to installation disc, so that gravity position is close to installation disc end face, additional bending moment to shaft head can be effectively reduced, improve dynamic characteristics, adapt to high speed application.

Description

Technical Field

[0001] This utility model belongs to the field of coupling technology and relates to the structure of a low-addition-bending-moment welded diaphragm coupling. Background Technology

[0002] Diaphragm disc couplings are widely used in various pumps, fans, and compressor units driven by gas turbines, steam turbines, and electric motors. They are particularly suitable for high-speed, high-power turbine compressor units that are sensitive to coupling weight and suspension bending moment.

[0003] The additional bending moment of a diaphragm coupling on the shaft head is directly proportional to the weight of the diaphragm coupling and the relative positions of the shaft head and the center of gravity of the diaphragm coupling. Traditional diaphragm couplings are generally of a standard mounting structure, with the center of gravity of the diaphragm coupling located far from the shaft head. Furthermore, the diaphragm is typically installed separately and connected to the mounting plate and adapter plate via bolts, resulting in a relatively large weight. While this may meet the needs of most applications, in high-speed applications where the weight of the coupling and the suspension bending moment are more sensitive, the conventional bolt-connected diaphragm coupling exhibits a significant weight and suspension bending moment, making it unsuitable for high-speed transmission units. Summary of the Invention

[0004] The purpose of this invention is to provide a low-addition-bending-moment welded diaphragm coupling structure that can solve the above-mentioned problems, improve dynamic characteristics, and adapt to high-speed applications.

[0005] According to the technical solution provided by this utility model: a low-addition-moment welded diaphragm coupling structure includes a spacer shaft, with a mounting plate connected to both sides of the spacer shaft via a flexible diaphragm disc assembly; the flexible diaphragm disc assembly includes a flexible diaphragm disc and a transfer disc, the transfer disc being connected to the spacer shaft via a torque-transmitting bolt and a self-locking nut, and the transfer disc being connected to the mounting plate via the flexible diaphragm disc; the flexible diaphragm disc is connected to the mounting plate and the transfer disc via a vacuum electron beam welding process, the inner periphery of the flexible diaphragm disc is provided with a flexible inner welding surface, the outer periphery of the mounting plate is provided with a mounting flange, the mounting flange is provided with a corresponding mounting welding surface, the mounting welding surface and the flexible inner welding surface are connected via a vacuum electron beam welding process; the outer periphery of the flexible diaphragm disc is provided with a flexible outer welding surface, the other end face of the transfer disc is provided with a transfer welding surface, the transfer welding surface and the flexible outer welding surface are connected via a vacuum electron beam welding process; the area between the flexible inner welding surface and the flexible outer welding surface is a flexible surface, which is a thin-walled curved surface that thickens from the outside to the inside.

[0006] As a further improvement of this utility model, the spacer is tubular with a hollow structure in the middle.

[0007] As a further improvement of this utility model, an outer stop is provided in the middle of the end face of the spacer shaft, and a matching inner stop is provided on the end face of the adapter plate; the outer circumference of the outer stop is evenly distributed with spacer shaft torque transmission holes, and correspondingly, the end face of the adapter plate is provided with adapter torque transmission holes, and the torque transmission bolt is installed with a self-locking nut after passing through the spacer shaft torque transmission holes and the adapter torque transmission holes.

[0008] As a further improvement of this utility model, an adjustment shim is provided between the adapter plate and the spacer shaft.

[0009] As a further improvement of this utility model, the adjusting shim is located between the diaphragm torque transmission hole and the adapter torque transmission hole.

[0010] As a further improvement of this utility model, the two mounting plates are respectively the active end mounting plate and the driven end mounting plate; a mounting hole is provided in the middle of the mounting plate.

[0011] As a further improvement of this utility model, an adjustment structure is provided between the mounting plate and the adapter plate; the adjustment structure includes connecting screw holes, adapter connection holes, and adjusting bolts. The connecting screw holes are evenly distributed on the mounting flange, and the adapter connection holes are arranged in a ring shape in the middle of the other end face of the adapter plate. The adjusting bolts pass through the adapter connection holes and are screwed into the connecting screw holes.

[0012] The positive and progressive effects of this application are as follows:

[0013] This invention replaces bolted connections with welding, effectively reducing the weight of the coupling; at the same time, by placing the flexible diaphragm disc close to the mounting plate, the center of gravity is brought closer to the end face of the mounting plate, which can effectively reduce the additional bending moment on the shaft head, improve dynamic characteristics, and adapt to high-speed applications. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the installation disk of this utility model.

[0016] Figure 3 This is a schematic diagram of the flexible membrane disk of this utility model.

[0017] Figure 4 This is a schematic diagram of the structure of the adapter plate of this utility model.

[0018] Figure 5 This is a schematic diagram of the intermediate spacer shaft of this utility model. Detailed Implementation

[0019] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0021] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this utility model described herein. Furthermore, terms such as "comprising" and "having" mean that in addition to those already listed in "comprising" and "having," other unlisted contents may also be included; for example, a process, method, system, product, or device may include a series of steps or units, not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices.

[0022] Due to the angle of the drawing, some parts may not be drawn, but their positions and connections can be understood from the text descriptions.

[0023] like Figure 1 As shown, this utility model is a low-addition-moment welded diaphragm coupling structure, including a spacer shaft 8, and the two sides of the spacer shaft 8 are connected to the mounting plate 1 through a flexible diaphragm plate assembly.

[0024] The spacer shaft 8 is tubular with a hollow structure in the middle. The flexible membrane disc assembly includes a flexible membrane disc 2 and an adapter disc 3. The adapter disc 3 is connected to the spacer shaft 8 by a torque bolt 7 and a self-locking nut 5. The adapter disc 3 is connected to the mounting disc 1 by the flexible membrane disc 2.

[0025] like Figure 5 As shown, an outer stop 8-2 is provided in the middle of the end face of the spacer shaft 8, such as Figure 4 As shown, the end face of the adapter plate 3 is provided with a matching inner stop 3-1, and the two stops complete the positioning of the adapter plate 3 and the spacer shaft 8; the outer stop 8-2 is evenly distributed with spacer shaft torque transmission holes 8-1 around its outer periphery, and correspondingly, the end face of the adapter plate 3 is provided with an adapter torque transmission hole 3-2. After the torque transmission bolt 7 passes through the spacer shaft torque transmission hole 8-1 and the adapter torque transmission hole 3-2, the self-locking nut 5 is installed to complete the connection between the adapter plate 3 and the spacer shaft 8.

[0026] Flexible diaphragm plate 2 connects mounting plate 1 and adapter plate 3 via vacuum electron beam welding process, specifically, as follows: Figure 3As shown, the flexible diaphragm disk 2 has a flexible inner welding surface 2-1 at its inner peripheral end, such as... Figure 2 As shown, the mounting plate 1 has a mounting flange 1-4 on its outer periphery, and the mounting flange 1-4 has a corresponding mounting welding surface 1-2. The mounting welding surface 1-2 is connected to the flexible inner welding surface 2-1 by a vacuum electron beam welding process. The flexible membrane plate 2 has a flexible outer welding surface 2-2 at its outer periphery end, and the other end face of the adapter plate 3 has an adapter welding surface 3-4 on its outer side. The adapter welding surface 3-4 is connected to the flexible outer welding surface 2-2 by a vacuum electron beam welding process.

[0027] Between the flexible inner welded surface 2-1 and the flexible outer welded surface 2-2 lies the flexible surface 2-3. The flexible surface 2-3 is a thin-walled curved surface that thickens from the outside in, which can compensate for misalignment of the unit while transmitting torque. The mounting plate 1 is inserted into the inner hole of the flexible diaphragm plate 2. The flexible diaphragm plate 2 serves as the area of ​​action of the center of gravity of the adapter plate 3 and the spacer shaft 8. It is close to the end face of the mounting plate 1, which greatly reduces the additional bending moment of the diaphragm plate coupling on the shaft head, making it effectively suitable for high-speed applications.

[0028] An adjusting shim 6 is provided between the adapter plate 3 and the spacer shaft 8 to adjust the installation length of the coupling. Specifically, the adjusting shim 6 is located between the spacer shaft torque transmission hole 8-1 and the adapter torque transmission hole 3-2.

[0029] The two mounting plates 1 are the active end mounting plate 1 and the driven end mounting plate 1, respectively. The mounting plate 1 has a mounting hole 1-1 in the middle. When the active end mounting plate 1 and the driven end mounting plate 1 are connected to the main shaft and the driven shaft respectively by interference fit, the spacer shaft 8 cannot be fitted between the two adapter plates 3 because the spacer shaft 8 has an outer stop 8-2 in the middle of its end face, and the distance between the outer stops 8-2 on both sides is greater than the distance between the two adapter plates 3. Therefore, an adjustment structure is provided between the mounting plate 1 and the adapter plate 3 to adjust the distance between the two adapter plates 3. The adjustment structure includes connecting screw holes 1-3, adapter connecting holes 3-3, and adjusting bolts 4. Connecting screw holes 1-3 are evenly distributed on the mounting flange 1-4. Adapter connecting holes 3-3 are arranged in a ring in the middle of the other end face of the adapter plate 3. The adjusting bolts 4 pass through the adapter connecting holes 3-3 and are screwed into the connecting screw holes 1-3. The head of the adjusting bolts 4 presses the adapter plates 3 outward, increasing the distance between the adapter plates 3. Then, the spacer shaft 8 is inserted between the two adapter plates 3. Finally, the adjusting bolts 4 are unscrewed.

[0030] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of this utility model, and the utility model is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of this utility model, and these modifications and improvements are also considered to be within the protection scope of this utility model.

Claims

1. A low-addition-moment welded diaphragm coupling structure, comprising a spacer shaft (8), characterized in that, The spacer shaft (8) is connected to the mounting plate (1) on both sides by a flexible diaphragm plate assembly; the flexible diaphragm plate assembly includes a flexible diaphragm plate (2) and a transfer plate (3). The transfer plate (3) is connected to the spacer shaft (8) by a torque bolt (7) and a self-locking nut (5). The transfer plate (3) is connected to the mounting plate (1) by the flexible diaphragm plate (2). The flexible diaphragm plate (2) is connected to the mounting plate (1) and the transfer plate (3) by a vacuum electron beam welding process. The flexible diaphragm plate (2) has a flexible inner welding surface (2-1) at its inner circumference end. The mounting plate (1) has a mounting flange (1-4) on its outer circumference. The upper part is provided with a corresponding mounting welding surface (1-2), and the mounting welding surface (1-2) and the flexible inner welding surface (2-1) are connected by vacuum electron beam welding process; the outer peripheral end of the flexible membrane disk (2) is provided with a flexible outer welding surface (2-2), and the outer side of the other end face of the adapter disk (3) is provided with an adapter welding surface (3-4), and the adapter welding surface (3-4) and the flexible outer welding surface (2-2) are connected by vacuum electron beam welding process; the flexible inner welding surface (2-1) and the flexible outer welding surface (2-2) are connected by a flexible surface (2-3), and the flexible surface (2-3) is a thin-walled curved surface that thickens from the outside to the inside.

2. The low-addition-moment welded diaphragm coupling structure as described in claim 1, characterized in that, The spacer (8) is tubular with a hollow structure in the middle.

3. The low-addition-moment welded diaphragm coupling structure as described in claim 1, characterized in that, The end face of the spacer shaft (8) is provided with an outer stop (8-2), and the end face of the adapter plate (3) is provided with a matching inner stop (3-1); the outer stop (8-2) is surrounded by a ring of spacer shaft transmission holes (8-1), and correspondingly, the end face of the adapter plate (3) is provided with an adapter transmission hole (3-2). The transmission bolt (7) passes through the spacer shaft transmission hole (8-1) and the adapter transmission hole (3-2) and then a self-locking nut (5) is installed.

4. The low-addition-moment welded diaphragm coupling structure as described in claim 1, characterized in that, An adjusting pad (6) is provided between the adapter plate (3) and the spacer shaft (8).

5. The low-addition-moment welded diaphragm coupling structure as described in claim 4, characterized in that, The adjusting shim (6) is located between the diaphragm torque transmission hole (8-1) and the adapter torque transmission hole (3-2).

6. The low-addition-moment welded diaphragm coupling structure as described in claim 1, characterized in that, The two mounting plates (1) are the active end mounting plate (1) and the driven end mounting plate (1) respectively; the mounting plate (1) has a mounting hole (1-1) in the middle.

7. The low-addition-moment welded diaphragm coupling structure as described in claim 1, characterized in that, An adjustment structure is provided between the mounting plate (1) and the adapter plate (3); the adjustment structure includes a connecting screw hole (1-3), an adapter connecting hole (3-3), and an adjusting bolt (4). The connecting screw holes (1-3) are evenly distributed on the mounting flange (1-4), and the adapter connecting hole (3-3) is arranged in a ring shape in the middle of the other end face of the adapter plate (3). The adjusting bolt (4) passes through the adapter connecting hole (3-3) and is screwed into the connecting screw hole (1-3).

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