Composite material membrane disc coupling

Abstract

The invention provides a composite material membrane disc coupling which is formed by sequentially gluing a lining, a composite material elastic membrane disc, a threaded plate, a cylindrical lining and a positioning lining, and the lining, the threaded plate, the cylindrical lining and the positioning lining are used for bolt connection of an elastic coupling and other parts. The bushing can prevent the composite material from being directly extruded by the bolt; the positioning bush is used for connecting the reamed bolt and plays a role in accurate positioning in the assembling process; and the threaded plate has the effects of fastening the bolt and enhancing the integral rigidity of the membrane disc. The corrugated carbon fiber composite membrane disc and the threaded plate are connected in a glued mode to form the corrugated carbon fiber composite membrane disc, the corrugated carbon fiber composite membrane disc serves as a novel coupler, axial and angular displacement compensation larger than that of a metal membrane can be achieved, and the weight of a shaft system can be effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of ship transmission, and in particular to a composite material diaphragm disc coupling. Background Art

[0002] As a power transmission element, the coupling is used to connect the main engine and the working machine, and transmit torque and speed to the driven end. Metal shafts and couplings are often used as transmission parts in modern ship power transmission systems. As modern power transmission systems develop towards high power and high torque, the weight of the product will increase accordingly. However, excessive coupling weight will increase the burden on the main engine, leading to increased wear, increased noise, and even excessive arm distance difference, which will seriously affect the performance and life of the main engine. Therefore, reducing the weight of the coupling has become a major problem that needs to be solved in the development of modern power transmission systems.

[0003] In modern coupling systems, metal diaphragms are often used to provide a certain degree of axial and angular displacement compensation capabilities for the shaft system. Due to the high density and large elastic modulus of metal materials, conventional metal diaphragm couplings are heavy and have weak compensation performance. Summary of the invention

[0004] In response to the problems existing in the prior art, the present application proposes a composite diaphragm coupling, which is composed of a bushing, a composite elastic diaphragm, a threaded plate, a cylindrical bushing and a positioning bushing which are glued together in sequence. The bushing, the threaded plate, the cylindrical bushing and the positioning bushing are used for bolt connection of the elastic coupling and other components; the bushing can prevent the composite material from being directly extruded by the bolts; the positioning bushing is used for the connection of the hinged bolts and plays a role in precise positioning during the assembly process; the threaded plate has the function of tightening the bolts and enhancing the overall stiffness of the diaphragm.

[0005] Furthermore, the composite elastic membrane disc is made of a light and high-strength fiber composite material.

[0006] Furthermore, the composite elastic diaphragm disk adopts an iso-rigidity corrugated surface structure.

[0007] A composite material high elastic coupling is formed by connecting the composite material diaphragm coupling and an elastic ring assembly.

[0008] A full carbon fiber flexible coupling is formed by connecting the above-mentioned composite material diaphragm coupling with a carbon fiber flanging shaft.

[0009] The composite film disc coupling provided by the present invention has the following beneficial effects compared with the prior art:

[0010] The present invention is composed of a corrugated carbon fiber composite material diaphragm disk and a threaded plate bonded together. As a new type of coupling, it can not only achieve greater axial and angular displacement compensation than a metal diaphragm, but also effectively reduce the weight of the shaft system. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a cross-sectional view of the structure of an embodiment of a composite material diaphragm coupling of the present invention;

[0012] Figure 2 A composite material high elastic coupling formed by connecting the present invention with an elastic ring assembly;

[0013] Figure 3 The composite diaphragm disk of the present invention has been successfully applied to the bench test of a large motor;

[0014] Figure 4 The all-carbon fiber flexible coupling is formed by connecting the present invention and the carbon fiber flanging shaft;

[0015] Figure 5 It is a schematic diagram of axial displacement compensation of the all-carbon fiber flexible coupling of the present invention;

[0016] Figure 6 It is a schematic diagram of angular displacement compensation of the all-carbon fiber flexible coupling of the present invention;

[0017] Figure 7 It is a schematic diagram of radial displacement compensation of the all-carbon fiber flexible coupling of the present invention.

[0018] Figure numbers and names: 1. first composite diaphragm disk, 2. first bushing, 3. threaded plate, 4. cylindrical bushing, 5. positioning bushing, 6. second composite diaphragm disk, 7. elastic ring assembly, 8. drive motor, 9. third composite diaphragm disk, 10. gear box, 11. first bolt, 12 first gasket, 13. nut, 14. second bushing, 15. fourth composite diaphragm disk, 16. second bolt, 17. second gasket, 18. pin sleeve, 19. threaded pressure ring, 20. carbon fiber flanging shaft. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0020] like Figure 1As shown, the basic structural type of the composite elastic diaphragm disk of the present application is composed of a first composite elastic diaphragm disk 1, a first bushing 2, a threaded plate 3, a cylindrical bushing 4 and a positioning bushing 5 glued together. The first bushing 2, the threaded plate 3, the cylindrical bushing 4 and the positioning bushing 5 are used for the bolt connection of the composite elastic diaphragm disk coupling and other components, wherein the metal bushing can prevent the composite material from being directly extruded by the bolts. In addition, the positioning bushing 5 is used for the connection of the hinged bolts, which plays a role in precise positioning during the assembly process. The threaded plate 3 has the function of tightening the bolts and enhancing the overall stiffness of the diaphragm disk. The composite diaphragm disk and elastic coupling proposed in the present application include a composite elastic diaphragm disk and a variety of structural types that together with other components constitute a coupling. It is usually arranged at the rear end of the rubber elastic element, mainly used to transmit power and torque, and has the function of compensating for large deviations in the axial, angular and radial directions.

[0021] In this application,

[0022] The composite elastic diaphragm is made of fiber resin-based composite materials using compression molding technology, which greatly reduces the overall weight of the coupling and can meet the weight reduction needs of modern high-power power transmission systems; conventional couplings are generally composed of multiple metal parts, and the weight of the coupling is large, which increases the main engine's hanging weight and bearing wear, and it is difficult to meet the development requirements of modern high-power power systems. Fiber composite materials such as carbon fiber and glass fiber have a density much lower than conventional metals, and at the same time have high strength. The composite diaphragm coupling made of lightweight and high-strength carbon fiber composite materials greatly reduces the weight of the coupling, reducing the weight by about 80% while meeting the same strength, reducing the main engine's hanging weight and bearing wear, and meeting the development needs of modern power systems with high power density and low target characteristics;

[0023] The composite elastic diaphragm disk adopts an equal-rigidity corrugated surface structure, which has greater displacement compensation capability than a plane structure; the metal diaphragm in a conventional coupling generally adopts a thin metal sheet of equal thickness or small thickness variation, and has limited displacement compensation capability; the present application utilizes the high strength of high-performance fiber composite materials and can be made thinner while meeting the strength requirements. At the same time, the composite elastic diaphragm disk of this patent adopts a corrugated surface, and according to the equal-rigidity design principle, it has a greater deformation capacity and can provide greater compensation capability.

[0024] The composite material diaphragm disk and the elastic coupling have a compact structural design and strong structural compatibility. The present application can be directly used with a variety of products such as elastic ring assemblies and carbon fiber flanged shafts and other transmission parts to form different couplings to meet the use requirements of the shaft system, and has strong compatibility. Figure 2 The composite material elastic diaphragm disk is connected with the elastic ring assembly to form a composite material high elastic coupling. Figure 4It is a composite elastic film coupling connected with a carbon fiber flange shaft to form a full carbon fiber flexible coupling with greater axial, angular and radial deformation compensation capabilities. Figure 5 , Figure 6 and Figure 7 shown.

[0025] like Figure 2 As shown, the present application can be connected with an elastic ring assembly to form a composite material high elastic coupling. The composite material high elastic coupling is used to connect a diesel engine and a gearbox to transmit torque, avoid the occurrence of strong torsional resonance of the shaft system within the operating speed range of the shaft system, and compensate for the steady-state and transient relative displacements in all directions between the master and slave equipment. It also has vibration isolation and shock resistance functions. The high elastic coupling is mainly composed of a rubber elastic element, a composite material diaphragm disc, an adapter disc, a cone sleeve and a Hough ring, among which the composite material diaphragm disc is made of carbon fiber composite material, which greatly reduces the weight of the composite material high elastic coupling and reduces the burden on adjacent equipment. At the same time, the composite material diaphragm disc can also compensate for the angular displacement and axial displacement of the coupling.

[0026] Composite high elastic couplings have been successfully used in bench tests of large motors, such as Figure 3 As shown, it connects the motor and the gearbox, transmits torque and speed, and compensates for the steady-state and transient relative displacement between the motor and the gearbox. At the same time, its weight is reduced by more than 50% compared with the conventional metal diaphragm coupling. The specific working parameters of the coupling are:

[0027] Rated torque: 25kNm

[0028] Maximum torque: 75kNm

[0029] Allowable variable torque: 7.5kNm

[0030] Maximum speed: 2125r / min

[0031] Maximum axial compensation: ±6mm

[0032] Maximum angular compensation: 1°.

[0033] This patent can also be connected with a carbon fiber flanged shaft to form a full carbon fiber flexible coupling, which greatly reduces the overall weight of the coupling and can meet the needs of reducing the weight of new high-power diesel engines. Figure 4, mainly composed of a first bolt 11, a first gasket 12, a nut 13, a second bushing 14, a fourth composite material diaphragm 15, a second bolt 16, a second gasket 17, a pin sleeve 18, a threaded pressure ring 19, and a carbon fiber flanging shaft 20. The two fourth composite material diaphragms 15 are connected to the carbon fiber flanging shaft 20 by the second bolt 16, the second gasket 17, the pin sleeve 18, and the threaded pressure ring 19. The entire coupling is connected to the external host and the working machine by the first bolt 11, the first gasket 12, and the nut 13. Among them, the fourth composite material diaphragm 15 is made of carbon fiber composite material and has a corrugated surface structure. While transmitting torque and speed, it can achieve axial and angular displacement compensation. This new all-carbon fiber flexible coupling not only greatly reduces the overall weight of the coupling, but also has the advantages of light weight and high strength, large compensation capacity, sound insulation and vibration reduction, corrosion resistance, and non-magnetic. This structure can be applied to 50MW propulsion shafting to connect adjacent transmission shafts. Its weight is more than 80% lighter than conventional couplings. The specific working parameters of the coupling are:

[0034] Rated torque: 2500kNm

[0035] Maximum torque: 5000kNm

[0036] Maximum allowable speed: 500r / min

[0037] Angular allowable displacement: 0.4mm / m

[0038] Radial allowable displacement: 1.5mm

[0039] Allowable axial displacement: ±7mm.

[0040] In summary, the above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereto. All equivalent changes and modifications made according to the patent scope of the present invention and the contents of the specification are within the scope covered by the patent of the present invention.

Claims

1. A composite film coupling, characterized in that: It is composed of a bushing, a composite elastic diaphragm, a threaded plate, a cylindrical bushing and a positioning bushing which are glued together in sequence. The bushing, the threaded plate, the cylindrical bushing and the positioning bushing are used for bolt connection of the elastic coupling and other components; the bushing can prevent the composite material from being directly extruded by the bolts; the positioning bushing is used for the connection of the hinged bolts and plays a role in precise positioning during the assembly process; the threaded plate has the function of tightening the bolts and enhancing the overall stiffness of the diaphragm.

2. The composite film coupling according to claim 1, characterized in that: The composite elastic membrane disc is made of a light and high-strength fiber composite material.

3. The composite film disc coupling according to claim 1, characterized in that: The composite elastic diaphragm disk adopts an iso-rigidity corrugated curved surface structure.

4. A composite material high elastic coupling, characterized in that: The composite film disc coupling is formed by connecting the composite film disc coupling as described in any one of claims 1 to 3 with an elastic ring assembly.

5. A full carbon fiber flexible coupling, characterized in that: It is formed by connecting the composite film disc coupling as described in any one of claims 1 to 3 with a carbon fiber flanging shaft.

Images