Preparation method and application of intermediate shaft of transmission device

Abstract

The invention discloses a preparation method and application of an intermediate shaft of a transmission device, and relates to the technical field of shaft parts, in particular to the preparation method and application of the intermediate shaft of the transmission device. The invention aims to solve the technical problem that the mass of the intermediate shaft of the transmission device made of a metal material is heavy at present. The prepared intermediate shaft is integrally formed, a three-dimensional composite material weaving technology is adopted, fiber bundle parameters and weaving angle parameters are designed, the intermediate shaft is woven on a fiber weaving machine according to the geometric shape of the metal intermediate shaft, and then the intermediate shaft is formed through curing in resin. A hole structure is reserved in the woven prefabricated body for bolt connection, and fiber damage caused by a conventional process method is avoided. The intermediate shaft is made of the carbon fiber reinforced resin-based composite material instead of a traditional metal material, so that the weight of the coupling can be effectively reduced, and the coupling is light in weight and has dynamic characteristics.

Description

Technical Field

[0001] The invention relates to the technical field of shaft components, and in particular to a preparation method of an intermediate shaft of a transmission device and application thereof. Background Art

[0002] The transmission system is often composed of gears, shafts, couplings and clutches, among which shafts and couplings are collectively referred to as shaft components. Shaft components are frequently used connecting components in power transmission systems and are mainly used to transmit power. Since the power transmission scenarios using couplings are complex and changeable, various constraints should be fully considered when designing couplings, such as the interface of the connecting shaft, space restrictions, weight requirements, system speed and maximum torque transmitted. Therefore, considering the dynamic characteristics of the power transmission system of the coupling has always been the focus of power equipment research and development, and the dynamic problems of high-speed power transmission systems containing elastic couplings have always been a bottleneck problem that plagues the research and development of power equipment. By selecting a suitable elastic coupling, it can change the natural frequency of the transmission system, adjust bending and torsional vibrations, and increase or decrease the critical speed. Matching the dynamic characteristics of the elastic coupling with the characteristics of the power system can improve transmission efficiency, reduce vibration and noise, and better serve the transmission shaft system of mechanical equipment such as ships, vehicles, and engineering machinery.

[0003] In recent years, with the development of composite material technology, the use of composite materials to replace metal materials to prepare shafts, couplings and other transmission components can achieve the goal of lightweighting with unchanged or better performance. Fiber-reinforced resin-based composite materials have high specific strength and specific stiffness, and have the unique advantage of being designable. Compared with traditional steel couplings, couplings made of carbon fiber composite materials have the characteristics of light weight, corrosion resistance, high temperature resistance, fatigue resistance, simple layout and installation, and easy operation and maintenance. Through the reasonable design of composite material structures, it is possible to achieve lightweighting of the power transmission system while improving the overall performance. Therefore, while ensuring that the power transmission, statics, dynamics and other performances are equal to or even higher than those of metal couplings, the use of composite materials to design and prepare couplings can achieve the goal of lightweighting. Further optimization of design parameters, process methods and system performance matching design can optimize the dynamic characteristics of the transmission system while taking into account lightweighting, and achieve the goal of vibration reduction and noise reduction. Summary of the invention

[0004] The present invention aims to solve the technical problem that the intermediate shaft of a transmission device made of metal material is heavy, and provides a preparation method of the intermediate shaft of a transmission device and application thereof.

[0005] The preparation method of the transmission intermediate shaft of the present invention is carried out according to the following steps:

[0006] 1. According to the shape structure and size of the intermediate shaft of the transmission device, the carbon fiber is three-dimensionally woven on a fiber braiding machine, and a hole structure is reserved during weaving for bolt connection to obtain a braided preform;

[0007] 2. Place the braided preform obtained in step 1 in resin, and then cure it to obtain the intermediate shaft of the transmission device.

[0008] The intermediate shaft of the transmission device of the present invention is used to form a coupling, such as Figure 1 As shown, it is composed of a transmission device intermediate shaft 1, a metal flange 2 and a metal diaphragm group 3. The metal diaphragm group 3 is located between the intermediate shaft 1 and the metal flange 2, and the three are connected by bolts 4.

[0009] Advantages of the present invention:

[0010] The intermediate shaft prepared by the present invention is integrally formed, adopts a three-dimensional braided composite material process, and is braided on a fiber braiding machine according to the geometric shape of the metal intermediate shaft by designing fiber bundle parameters and braiding angle parameters, and then cured in resin. The present invention reserves a hole structure in the braided preform for bolt connection, avoiding the occurrence of fiber damage introduced by conventional process methods (the conventional method is: mechanical processing after the fiber preform is cured).

[0011] The intermediate shaft prepared by the present invention can also be used for diaphragm couplings, diaphragm couplings, transmission shafts, and the like.

[0012] The present invention adopts a carbon fiber reinforced resin-based composite material to replace the intermediate shaft made of a traditional metal material, which can effectively reduce the weight of the coupling, making the coupling lightweight while taking into account the dynamic characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The present invention is a synthetic process flow chart of the carboxylated multi-walled carbon nanotube intermediate layer thin film nanocomposite membrane. DETAILED DESCRIPTION

[0014] Specific implementation method 1: This implementation method is a method for preparing an intermediate shaft of a transmission device, which is specifically carried out according to the following steps:

[0015] 1. According to the shape structure and size of the intermediate shaft of the transmission device, the carbon fiber is three-dimensionally woven on a fiber braiding machine, and a hole structure is reserved during weaving for bolt connection to obtain a braided preform;

[0016] 2. Place the braided preform obtained in step 1 in resin, and then cure it to obtain the intermediate shaft of the transmission device.

[0017] Specific implementation method 2: This implementation method is different from specific implementation method 1 in that the carbon fiber described in step 1 is a 24k carbon fiber bundle. The rest is the same as specific implementation method 1.

[0018] Specific implementation method 3: This implementation method is different from specific implementation method 1 or 2 in that the braiding angle parameter in step 1 is 45° or 60°. The rest is the same as specific implementation method 1 or 2.

[0019] Specific embodiment 4: This embodiment is different from specific embodiments 1 to 3 in that the resin model described in step 2 is JL-235. The rest is the same as specific embodiments 1 to 3.

[0020] Specific embodiment 5: This embodiment is different from specific embodiment 4 in that the curing process in step 2 is: keeping the temperature at 40°C to 50°C for 3 hours, and then keeping the temperature at 60°C to 80°C for 6 hours to 8 hours. The rest is the same as specific embodiment 4.

[0021] Specific implementation example 6: This implementation example is different from specific implementation example 5 in that the volume fraction of the carbon fiber in the intermediate shaft of the transmission device described in step 2 is 48%. The rest is the same as specific implementation example 5.

[0022] Specific implementation method 7: This implementation method is the application of the intermediate shaft of the transmission device in the specific implementation method 1, which is used to form a coupling, such as Figure 1 As shown, the coupling is composed of a transmission device intermediate shaft 1, a metal flange 2 and a metal diaphragm group 3. The metal diaphragm group 3 is located between the intermediate shaft 1 and the metal flange 2, and the three are connected by bolts 4.

[0023] Specific embodiment 8: This embodiment is different from specific embodiment 7 in that the number of the bolts 4 is even and they are installed alternately in positive and negative directions. The rest is the same as specific embodiment 7.

[0024] Test 1: This test is a method for preparing a transmission intermediate shaft, which is specifically carried out in the following steps:

[0025] 1. According to the shape structure and size of the intermediate shaft of the transmission device, the carbon fiber is three-dimensionally woven on a fiber braiding machine, and a hole structure is reserved during weaving for bolt connection to obtain a braided preform;

[0026] The carbon fiber described in step 1 is a 24k carbon fiber bundle;

[0027] In step 1, the braiding angle parameter during braiding is 45°;

[0028] 2. placing the braided preform obtained in step 1 in resin and then curing it to obtain an intermediate shaft of the transmission device;

[0029] The resin model described in step 2 is JL-235;

[0030] The curing process in step 2 is: keep at 45°C for 3 hours, then keep at 70°C for 7 hours;

[0031] The volume fraction of carbon fiber in the intermediate shaft of the transmission device described in step 2 is 48%;

[0032] The intermediate shaft of the transmission device in Test 1 is used to form a coupling, such as Figure 1 As shown, the coupling is composed of a transmission device intermediate shaft 1, a metal flange 2 and a metal diaphragm group 3. The metal diaphragm group 3 is located between the intermediate shaft 1 and the metal flange 2. The three are connected by bolts 4. The number of the bolts 4 is even and they are installed alternately in forward and reverse directions.

[0033] This test uses carbon fiber reinforced resin-based composite materials instead of traditional metal materials to make the intermediate shaft, which can effectively reduce the weight of the coupling, making the coupling lightweight and taking into account the dynamic characteristics. The test data is shown in Table 1 below, which is a comparison of the natural frequencies of intermediate shafts made of different materials. The composite material is the transmission intermediate shaft prepared in Test 1, and the steel material is the Q235 intermediate shaft. The composite material has a lower natural frequency than steel.

[0034] Table 1 Comparison of natural frequencies of composite materials and steel (Q235) obtained from test

[0035] Natural frequency Steel(Hz) Composite material (Hz) First Stage 4212.5 2746.25 Second stage 4235 2817.5 Stage 3 4487.5 3061.25 Fourth Stage 4530 3127.5 Fifth Stage 4542.5 3192.5 Stage 6 4727.5 3480 Seventh level 4740 3788.75 Eighth Stage 4865 3858.75 Ninth Stage 4890 4090

Claims

1. A method for preparing a transmission intermediate shaft, characterized in that The preparation method of the transmission intermediate shaft is carried out according to the following steps:

1. According to the shape structure and size of the intermediate shaft of the transmission device, the carbon fiber is three-dimensionally woven on a fiber braiding machine, and a hole structure is reserved during weaving for bolt connection to obtain a braided preform; 2. Place the braided preform obtained in step 1 in resin, and then cure it to obtain the intermediate shaft of the transmission device.

2. The method for preparing a transmission intermediate shaft according to claim 1, characterized in that The carbon fiber described in step 1 is a 24k carbon fiber bundle.

3. The method for preparing a transmission intermediate shaft according to claim 1, characterized in that In step 1, the braiding angle parameter during braiding is 45° or 60°.

4. The method for preparing a transmission intermediate shaft according to claim 1, characterized in that The resin model described in step 2 is JL-235.

5. The method for preparing a transmission intermediate shaft according to claim 1, characterized in that The curing process in step 2 is: keep warm at 40°C to 50°C for 3 hours, and then keep warm at 60°C to 80°C for 6 hours to 8 hours.

6. The method for preparing a transmission intermediate shaft according to claim 1, characterized in that The volume fraction of the carbon fiber in the intermediate shaft of the transmission device described in step 2 is 48%.

7. The use of a transmission intermediate shaft as claimed in claim 1, characterized in that The transmission device intermediate shaft is used to form a coupling. The coupling is composed of a transmission device intermediate shaft 1, a metal flange 2 and a metal diaphragm group 3. The metal diaphragm group 3 is located between the intermediate shaft 1 and the metal flange 2. The three are connected by bolts 4.

8. The use of a transmission intermediate shaft according to claim 7, characterized in that The number of the bolts 4 is even and they are installed alternately in forward and reverse directions.

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