Membrane disc coupling structure with axial support

Abstract

The utility model relates to a membrane disc coupling structure with axial support, which comprises a first connecting piece, a second connecting piece, a membrane disc assembly and an auxiliary inner cylinder, the first connecting piece and the second connecting piece are respectively arranged at two ends of the membrane disc assembly, the membrane disc assembly comprises a first membrane disc and a second membrane disc, convex rings are arranged at inner holes of the first membrane disc and the second membrane disc respectively, and anti-compression rings capable of being matched with each other are arranged on the opposite faces of the two convex rings respectively. According to the utility model, the structure that the compression-resistant rings are arranged on the membrane disc assembly is adopted, and the excessive axial compression load can be resisted through the matching of the two compression-resistant rings; the auxiliary inner cylinder in the coupling can resist excessive axial tensile load through the matching of the tensile plate and the side wall of the convex ring; on the basis of the basic structure, the membrane disc inner ring structure is modified, the auxiliary cylinder is added, the weight of the membrane disc coupler is greatly reduced, parts with limited service life such as a knuckle bearing do not exist, and the service life of the membrane disc coupler is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of flexible transmission technology and relates to a membrane disc coupling structure with axial support. Background Art

[0002] Diaphragm couplings are used in high-speed, high-compensation operating environments, performing essential functions such as power transmission, misalignment compensation, and axial movement compensation. Their basic structure consists of a diaphragm assembly to compensate for misalignment and axial movement, a connection device (such as a flange) connecting the input and output ends, and a thin-walled shaft to transmit torque. However, the diaphragm assembly's ability to compensate for axial movement is more limited than that of couplings such as gear couplings. To prevent excessive axial extension or compression of the diaphragm assembly, various solutions have been proposed, both domestically and internationally.

[0003] For example, invention patent CN111043150A uses spherical bearings to resist axial impact loads and prevent damage to the diaphragm assembly. Invention patent US10995800B uses self-aligning ball bearings to connect the input and output ends to prevent excessive axial tension or axial pressure while performing thermal compensation. Invention patent US11408467B2 sets a hollow shaft inside the diaphragm assembly to transmit most of the axial load, eliminating the need for spherical bearings and improving the average maintenance operation time. Invention patent US10704607B2 arranges an internal flexible coupling inside the external diaphragm coupling, allowing it to extend or shorten axially to a limited extent independent of the external diaphragm coupling, and can adapt to axial movement caused by various factors. Invention patent US9546694B2 sets a main shaft inside the diaphragm coupling, extending through the internal cavity of the diaphragm coupling without contacting it, to resist loads applied in the axial direction.

[0004] These solutions all prevent excessive deformation of the diaphragm assembly by adding multiple parts to the basic diaphragm coupling structure. However, this increases the complexity and weight of the overall structure of the diaphragm coupling. In addition, the life of the spherical bearing directly affects the service life and refurbishment cycle of the diaphragm coupling. Summary of the Invention

[0005] The purpose of the utility model is to overcome the deficiencies in the prior art, solve the problem of excessive stretching or compression when the diaphragm coupling is subjected to a large axial load during use, and provide a diaphragm coupling structure with axial support.

[0006] In order to achieve the above objectives, the following technical solutions are adopted:

[0007] The diaphragm coupling structure with axial support includes a first connecting member, a second connecting member, a diaphragm assembly and an auxiliary inner cylinder. The first connecting member and the second connecting member are respectively provided at both ends of the diaphragm assembly. The diaphragm assembly includes a first diaphragm and a second diaphragm. The inner holes of the first diaphragm and the second diaphragm are respectively provided with convex rings, and the opposite surfaces of the two convex rings are respectively provided with pressure-resistant rings that can cooperate with each other; the interior of the first connecting member is provided with an auxiliary inner cylinder, and the auxiliary inner cylinder extends into the end of the second connecting member and is provided with a tensile plate, and one side of the tensile plate can cooperate with the outer side wall of the convex ring.

[0008] Preferably, the first connecting member and the second connecting member are connecting flanges, and the first connecting member and the second connecting member are fixed to the first diaphragm disc and the second diaphragm disc respectively by welding.

[0009] Preferably, the first connecting member and the second connecting member are spline sleeves.

[0010] Preferably, the opposing surfaces of the first membrane disc and the second membrane disc are hyperbolic surfaces.

[0011] Preferably, the distance between the tensile plate and the convex ring is 1-2 mm.

[0012] Preferably, the distance between the two anti-compression rings is 1-2 mm.

[0013] Preferably, an inwardly protruding connecting convex ring is provided at the inner hole of the first connecting member, and the auxiliary inner cylinder and the connecting convex ring can be fixed by welding or threaded connection.

[0014] Preferably, the first connecting member, the second connecting member, the diaphragm disc assembly and the auxiliary inner cylinder are all made of titanium alloy.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] The utility model is provided with a pressure-resistant ring structure on the diaphragm disc assembly, and the cooperation of the two pressure-resistant rings can resist excessive axial compression loads; the auxiliary inner cylinder inside the coupling can resist excessive axial tensile loads through the cooperation of the tensile plate and the side wall of the convex ring; only on the basis of the basic structure, the inner ring structure of the diaphragm disc is modified and the auxiliary cylinder is added, which greatly reduces the weight of the diaphragm disc coupling, and there are no limited-life parts such as joint bearings, thereby improving the service life of the diaphragm disc coupling; the utility model has a simple structure, is easy to maintain, has low cost and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 2 This is an exploded view showing the assembly of the present invention.

[0019] In the figure: 1. First connecting member; 2. Second connecting member; 3. Auxiliary inner cylinder; 4. First diaphragm disk; 5. Second diaphragm disk; 6. Protruding ring; 7. Compression ring; 8. Tensile plate; 9. Connecting protruding ring. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0021] like Figure 1-Figure 2 As shown, a diaphragm coupling structure with axial support includes a first connecting member 1, a second connecting member 2, a diaphragm assembly and an auxiliary inner cylinder 3. The first connecting member 1 and the second connecting member 2 are respectively provided at both ends of the diaphragm assembly. The first connecting member 1 and the second connecting member 2 are used to connect the transmission shaft;

[0022] The diaphragm disc assembly includes a first diaphragm disc 4 and a second diaphragm disc 5. The inner holes of the first diaphragm disc 4 and the second diaphragm disc 5 are respectively provided with convex rings 6. The opposite surfaces of the two convex rings 6 are respectively provided with anti-pressure rings 7 that can cooperate with each other. When the first diaphragm disc 4 and the second diaphragm disc 5 are subjected to excessive axial compression loads, the two anti-pressure rings 7 will resist each other due to the deformation of the first diaphragm disc 4 and the second diaphragm disc 5, and can resist the axial compression load.

[0023] An auxiliary inner tube 3 is provided inside the first connecting member 1, and a tensile plate 8 is provided at the end of the auxiliary inner tube 3 extending into the second connecting member 2. One side of the tensile plate 8 can cooperate with the outer side wall of the convex ring 6. When the first diaphragm disk 4 and the second diaphragm disk 5 are subjected to excessive axial tensile load, the tensile plate 8 contacts the outer side wall of the convex ring 6 of the second diaphragm disk 5 to resist the axial tensile load.

[0024] Furthermore, the first connecting member 1 and the second connecting member 2 are connecting flanges, and the first connecting member 1 and the second connecting member 2 are fixed to the first membrane disk 4 and the second membrane disk 5 respectively by welding. During specific processing, electron beam welding can be used for welding, which has fast welding speed, large depth and high joint strength.

[0025] Furthermore, the first connecting member 1 and the second connecting member 2 are spline sleeves. When facing the spline shaft, the first connecting member 1 and the second connecting member 2 in the form of spline sleeves are suitable.

[0026] Furthermore, the opposing surfaces of the first membrane disc 4 and the second membrane disc 5 are hyperbolic surfaces.

[0027] Furthermore, the distance between the tensile plate 8 and the convex ring 6 is 1-3 mm. When the coupling is under normal load, there is a certain distance between the tensile plate 8 and the convex ring 6. During welding and assembly, the gap between the tensile plate 8 and the convex ring 6 can be adjusted to adjust the ultimate compensation capacity of the diaphragm disc assembly.

[0028] Furthermore, the distance between the two anti-compression rings 7 is 1-3 mm. When the coupling is under normal load, there is a certain distance between the two anti-compression rings 7. When the two transmission shafts are misaligned, the diaphragm disc assembly has a certain compensation ability; and during welding and assembly, the gap between the two anti-compression rings 7 can be adjusted to adjust the ultimate compensation capacity of the diaphragm disc assembly.

[0029] Furthermore, an inwardly protruding connecting convex ring 9 is provided at the inner hole of the first connecting member 1 , and the auxiliary inner tube 3 and the connecting convex ring 9 can be fixed by welding or threaded connection, and the connecting convex ring 9 provides installation support for the auxiliary inner tube 3 .

[0030] Furthermore, the first connecting member 1, the second connecting member 2, the diaphragm disc assembly and the auxiliary inner cylinder 3 are all made of titanium alloy.

[0031] Furthermore, as another embodiment of the present invention, the membrane disc assembly can be formed by connecting multiple membrane discs in series, which can have a higher compensation capability.

[0032] Working principle: During assembly, the present invention can be assembled by, for example, electron beam welding, using a specially designed welding tool to weld the first connector 1, the second connector 2, and the diaphragm assembly into one piece. During the welding process, a gap is left between the two compression rings 7 to ensure the axial compression compensation capability of the diaphragm assembly. Afterwards, the auxiliary inner cylinder 3 is fixedly mounted on the connecting convex ring 9. It is necessary to ensure that there is a certain distance between the tensile plate 8 and the convex ring 6 to ensure the axial tension compensation capability of the diaphragm assembly.

[0033] When the utility model is in use, when the first diaphragm 4 and the second diaphragm 5 receive excessive axial compression load, the two anti-compression rings 7 will resist each other due to the deformation of the first diaphragm 4 and the second diaphragm 5, and can resist the axial compression load;

[0034] When the first diaphragm 4 and the second diaphragm 5 are subjected to excessive axial tensile load, the tensile plate 8 contacts the outer side wall of the protruding ring 6 of the second diaphragm 5 to resist the axial tensile load.

[0035] It is understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present invention, and the present invention is not limited thereto. Those skilled in the art may make various modifications and improvements without departing from the spirit and substance of the present invention, and such modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A diaphragm coupling structure with axial support, comprising a first connecting member (1), a second connecting member (2), a diaphragm assembly and an auxiliary inner cylinder (3), wherein the first connecting member (1) and the second connecting member (2) are respectively provided at both ends of the diaphragm assembly, and wherein: The diaphragm disc assembly comprises a first diaphragm disc (4) and a second diaphragm disc (5), wherein convex rings (6) are respectively provided at the inner holes of the first diaphragm disc (4) and the second diaphragm disc (5), and anti-pressure rings (7) that can cooperate with each other are respectively provided on the opposite surfaces of the two convex rings (6); an auxiliary inner tube (3) is provided inside the first connecting member (1), and a tensile plate (8) is provided at the end of the auxiliary inner tube (3) extending into the second connecting member (2), and one side of the tensile plate (8) can cooperate with the outer side wall of the convex ring (6).

2. The diaphragm coupling structure with axial support according to claim 1, characterized in that: The first connecting member (1) and the second connecting member (2) are connecting flanges, and the first connecting member (1) and the second connecting member (2) are fixed to the first diaphragm disc (4) and the second diaphragm disc (5) respectively by welding.

3. The diaphragm coupling structure with axial support according to claim 1, characterized in that: The first connecting member (1) and the second connecting member (2) are spline sleeves.

4. The diaphragm coupling structure with axial support according to claim 1, characterized in that: The opposing surfaces of the first membrane disc (4) and the second membrane disc (5) adopt hyperbolic surfaces.

5. The diaphragm coupling structure with axial support according to claim 1, characterized in that: The distance between the tensile plate (8) and the convex ring (6) is 1-2 mm.

6. The diaphragm coupling structure with axial support according to claim 1, characterized in that: The distance between the two anti-compression rings (7) is 1-2 mm.

7. The diaphragm coupling structure with axial support according to claim 1, characterized in that: An inwardly protruding connecting convex ring (9) is provided at the inner hole of the first connecting member (1), and the auxiliary inner cylinder (3) and the connecting convex ring (9) can be fixed by welding or threaded connection.

8. The diaphragm coupling structure with axial support according to claim 1, characterized in that: The first connecting member (1), the second connecting member (2), the membrane disc assembly and the auxiliary inner cylinder (3) are all made of titanium alloy.

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