Splined coupling sleeve, composite carbon-fiberglass hybrid

Abstract

The utility model relates to the field of mechanical engineering, in particular to connecting elements, representing a spline coupling sleeve made of a composite carbon-fiberglass hybrid material. The spline coupling sleeve is a composite carbon-fiberglass hybrid material, comprising a sleeve body in which a hole with a small and large diameter formed by projections and recesses is formed for the spline connection, a hole for a pin, wherein the sleeve is made of a composite material including a fiberglass base in the form of a fiber, impregnated with a binder resin, which is an epoxy resin, wherein the fiberglass base in the form of a fiber, impregnated with a binder epoxy resin, is made with the addition of diamond powder, preliminarily uniformly mixed in the resin. The technical result of the utility model is to increase the stability of the splined connection of the sleeve by increasing the rigidity of the epoxy hybrid composites.2 pages.

Description

[0001] Technical field

[0002] The utility model relates to the field of mechanical engineering, in particular to connecting elements, representing a connecting sleeve of a splined coupling made of a composite carbon-fiberglass hybrid material.

[0003] Technology Level

[0004] A known device is a composite vibration-isolating coupling (patent RU 2530915 IPC F16D 3 / 04. Published October 20, 2014, Bulletin No. 29). The vibration-isolating coupling is described as reducing the resonant amplitudes of torsional vibrations while maintaining strength. This is achieved by introducing a layer of rigid vibration-absorbing polymer material, located on the outer surface of the intermediate shaft, into the design of the composite vibration-isolating coupling, which has membranes connected by an intermediate shaft.

[0005] The main disadvantage of the known device is the low stability of the fastening connection.

[0006] A device is known - a splined coupling sleeve made of composite basalt material (patent RU 232205 IPC F16D 1 / 08. Published 03.03.2025 Bulletin No. 7), including a sleeve body, a small diameter splined connection and a large diameter splined connection, a hole for a pin, while the sleeve is made of a composite material including a basalt base in the form of a fiber impregnated with an epoxy binder, with the addition of basalt powder, previously uniformly mixed in the resin.

[0007] The disadvantages of the closest device are the low stability of the fastening connection.

[0008] Disclosure of utility model.

[0009] The technical result of the utility model is to increase the stability of the splined connection of the bushing by increasing the rigidity of epoxy hybrid composites.

[0010] The present technical result is achieved in a device for a splined coupling sleeve, a composite carbon-fiberglass hybrid, including a sleeve body in which an opening is made with small and large diameters formed by protrusions and depressions, for a splined connection, an opening for a pin, wherein the sleeve is made of a composite material including a fiberglass base in the form of a fiber, impregnated with a binding resin, which is an epoxy resin, wherein the fiberglass base in the form of a fiber, impregnated with a binding epoxy resin, is made with the addition of diamond powder, previously uniformly mixed in the resin.

[0011] Distinctive features are

[0012] The fiberglass base of the bushing is made in the form of fiber impregnated with a binder resin, with the addition of diamond powder, this increases the stability of the splined connection of the bushing by improving the rigidity of epoxy hybrid composites [3];

[0013] pre-mixed diamond powder uniformly in the resin, this increases the stability of the splined connection of the sleeve by improving the rigidity of epoxy hybrid composites [4].

[0014] The uniaxial compressive strength of quartz, the main material of fiberglass, is on average 280 MPa [5], and the uniaxial compressive strength of diamond is on average 1650 MPa [5], which ensures excellent surface stability and also gives increased volumetric stability to local loads and mechanical impacts.

[0015] Thus, the new carbon fiber composite spline coupling design not only increases the overall reliability and durability of the product, but also eliminates the potential failure points that might occur when using traditional materials, thereby ensuring stable and durable operation under challenging operating conditions.

[0016] Comparison of the claimed solution with analogs and the prototype allowed us to identify features that distinguish the claimed solution, which allows us to conclude that it meets the “novelty” criterion.

[0017] Brief description of figures

[0018] Fig. 1 shows a dimetric view of a spline coupling sleeve made of composite carbon-fiberglass material impregnated with a binding resin with the addition of diamond powder to the fibers, including: 1 - sleeve body; 2 - outer diameter of the sleeve; 3 - opening of the connecting element.

[0019] Fig. 2 shows a section A-A along the splined connection from Fig. 1, including: 4 - small diameter of the splined connection; 5 - large diameter of the splined connection; 6 - glass roving threads formed in the required order; 7 - diamond powder; 8 - deformed glass roving threads.

[0020] Implementation of a utility model

[0021] The primary raw material for the production of splined coupling sleeves made of carbon-fiberglass composite material is glass roving. Additionally, the following materials are required to manufacture splined coupling sleeves made of this composite material: resins, glass roving, ethyl alcohol, acetone, and dicyandiamide. Diamond powder is obtained from diamond industry waste by grinding it in an AGO-2S planetary ball mill and sifting it to a fraction of 50-54 microns.

[0022] The fiberglass spline coupling production process is as follows. Fiberglass roving threads coming from the creel are fed to a tensioning mechanism. This mechanism ensures uniform tension of the threads and their proper placement in accordance with the specified configuration for forming the future product. After tensioning, the roving undergoes a drying and preheating stage with hot air. This is necessary to remove moisture from the threads and improve resin adhesion. The heating temperature and time are selected depending on the roving characteristics and the type of resin used. The heated roving is impregnated with resin, pre-mixed uniformly with diamond powder 7 in a mixer. Impregnation occurs in an impregnation bath, ensuring uniform distribution of the resin throughout the roving. The impregnated roving threads 6 are passed through a drawing mechanism, which ensures a continuous process and a specified drawing speed.Upon exiting the drawing mechanism, the composite rod passes through a profiling die, a matrix with a hole that forms the final shape of the cylindrical bushing for producing splines. The profiling die can be made, for example, as a split steel structure consisting of two rectangles with a milled and machined groove along the half-shape of each part. When closed, these two parts form a rectangular outer surface and a cylindrical inner surface corresponding to the area of ​​the target device, equal to the area of ​​the specified bushing blank. A three-station automatic press is used to produce the composite fiberglass bushing. Hot stamping of the bushing blank is carried out in three process stages. At the first stamping station, the blank is calibrated and the hole and spline are formed in the bushing blank for further calibration.Starting from the second stamping station, the bushing body 1 with an outer diameter 2 and the opening 3 of the connecting element are formed. At the third stamping station, the formation of the opening 3 of the connecting element in the bushing blank is completed, and the spline calibration is completed, ensuring the formation of a small diameter 4 and a large diameter 5 splined connection. At the same time, the glass roving threads 6, diamond powder 7, and deformed glass roving threads 8 strengthen the splined connecting elements of the bushing by increasing the rigidity of the epoxy hybrid composites.

[0023] After this, the device is ready; all that remains is to test it. The key parameter is the load it can withstand, increasing its strength and wear resistance by enhancing the carbon-fiberglass composite material with a combination of fiberglass and diamond powder.

[0024] The average uniaxial compressive strength of diamond is 1650 MPa [5], which improves the surface and volumetric stability of the device.

[0025] The claimed carbon-fiberglass hybrid splined coupling sleeve increases the stability of the splined faces of the connection during its operation and eliminates their possible weakening, due to the increased rigidity of epoxy hybrid composites.

[0026] Sources of information

[0027] 1. Patent RU 2530915 IPC F16D 3 / 04. Published 20.10.2014 Bulletin No. 29.

[0028] 2. Patent RU 232205 MPK F16D 1 / 08. Published: 03 / 03 / 2025 Bulletin. No. 7.

[0029] 3. Hybrid influence of basalt fibers and basalt powder on thermomechanical properties of epoxy composites. Composites Part B: Mechanical Engineering, Vol. 125, 2017, pp. 157-164.

[0030] 4. Gavrilov M.A. Technology of production and chemical-biological stability of epoxy composites based on production waste. Diss. Cand. Tech. Sciences, Krasnoyarsk: KSTU, 1997, p. 278, pp. 128, 133-134.

[0031] 5. Fundamentals of Rock Physics, Geomechanics, and Massif State Management. Portsevsky A.K., Katkov G.A. UMO approval (No. 51-73 of June 28, 2004), registered with the Federal Education Agency (No. 5374 of November 16, 2005), 120 pp. p. 21.

Claims

A splined coupling sleeve is a composite carbon-fiberglass hybrid, comprising a sleeve body in which an opening is made with a small and large diameter formed by projections and depressions for a splined connection, an opening for a pin, wherein the sleeve is made of a composite material including a fiberglass base in the form of a fiber, impregnated with a binding resin, which is an epoxy resin, characterized in that the fiberglass base in the form of a fiber, impregnated with a binding epoxy resin, is made with the addition of diamond powder, previously uniformly mixed in the resin.

Images