阅读说明：本技术 一种碳纤维增强复合结构液压油缸缸体 (Carbon fiber reinforced composite structure hydraulic cylinder body ) 是由 包俊成 李玉林 于 2021-08-30 设计创作，主要内容包括：本发明涉及一种碳纤维增强复合结构液压油缸缸体,包括复合结构油缸外筒、活塞杆、顶部螺旋封头以及底部螺旋封头,复合结构油缸外筒为圆柱筒形结构,在复合结构油缸外筒内同轴导向滑动安装活塞杆,在复合结构油缸外筒的轴向两端分别同轴安装有顶部螺旋封头以及底部螺旋封头,复合结构油缸外筒是由薄壁金属钢筒以及碳纤维增强层构成,薄壁金属钢筒的外表面包覆碳纤维增强层。本发明在传统低合金钢液压油缸缸体基础上,利用低密度、高强度、高模量碳纤维和利用低密度、高强度铝合金替代传统低合金钢,施以新型缸体工艺技术,制造出质量更轻、强度更高、寿命更长、更安全可靠的新型复合结构液压油缸。(The invention relates to a carbon fiber reinforced composite structure hydraulic cylinder body which comprises a composite structure cylinder outer cylinder, a piston rod, a top spiral end socket and a bottom spiral end socket, wherein the composite structure cylinder outer cylinder is of a cylindrical structure, the piston rod is coaxially and slidably installed in the composite structure cylinder outer cylinder in a guiding mode, the top spiral end socket and the bottom spiral end socket are coaxially installed at two axial ends of the composite structure cylinder outer cylinder respectively, the composite structure cylinder outer cylinder is composed of a thin-wall metal steel cylinder and a carbon fiber reinforced layer, and the carbon fiber reinforced layer is coated on the outer surface of the thin-wall metal steel cylinder. On the basis of the traditional low-alloy steel hydraulic cylinder body, the novel composite structure hydraulic cylinder with lighter weight, higher strength, longer service life, safety and reliability is manufactured by using the low-density, high-strength and high-modulus carbon fibers and the low-density and high-strength aluminum alloy to replace the traditional low-alloy steel and applying a novel cylinder body process technology.)

1. The utility model provides a carbon fiber reinforced composite structure hydraulic cylinder body, includes composite structure hydro-cylinder urceolus, piston rod, top spiral head and bottom spiral head, and composite structure hydro-cylinder urceolus is cylindrical tubular structure, coaxial direction slidable mounting piston rod in composite structure hydro-cylinder urceolus, and coaxial mounting has top spiral head and bottom spiral head, its characterized in that respectively at the axial both ends of composite structure hydro-cylinder urceolus: the outer cylinder of the oil cylinder with the composite structure is composed of a thin-wall metal steel cylinder and a carbon fiber reinforced layer, and the carbon fiber reinforced layer is coated on the outer surface of the thin-wall metal steel cylinder.

2. The carbon fiber reinforced composite structure hydraulic cylinder body according to claim 1, characterized in that: and performing damping protection on the surface of the carbon fiber reinforced layer, wherein the thickness of the damping protection layer is 3-6 mm.

3. The carbon fiber reinforced composite structure hydraulic cylinder body according to claim 1, characterized in that: the installation method of the carbon fiber reinforced layer comprises the following steps: and (3) winding the carbon fiber reinforced layer of the carbon fiber composite material on the outer surface of the thin-wall metal steel cylinder by adopting a dry winding forming process or a wet winding forming process, wherein the winding coating angle is 0-75 degrees.

4. The carbon fiber reinforced composite structure hydraulic cylinder body according to claim 1, characterized in that: the thin-wall metal steel cylinder is made of low-alloy high-strength steel with the yield strength of 550 MPa-650 MPa, the thickness range of the thin-wall metal steel cylinder is 2.5 mm-8.5 mm, the outer surface of the steel cylinder is subjected to shot blasting and passivation treatment, the inner surface of the steel cylinder is subjected to anticorrosive wear-resistant spraying and polishing treatment, the thickness of the coating is 15 mu m-30 mu m, and the bonding strength is more than 60 MPa.

5. The carbon fiber reinforced composite structure hydraulic cylinder body according to claim 1, characterized in that: the matrix material of the carbon fiber reinforced layer is epoxy resin with the glass transition temperature of more than or equal to 120 ℃.

6. The carbon fiber reinforced composite structure hydraulic cylinder body according to claim 1, characterized in that: the thickness range of the carbon fiber reinforced layer is 5 mm-30 mm.

7. The carbon fiber reinforced composite structure hydraulic cylinder body according to claim 1, characterized in that: the wall thickness range of the piston rod is 6 mm-30 mm, the surface of the piston rod is sprayed with a wear-resistant layer, the thickness of the wear-resistant and corrosion-resistant layer after surface treatment is 15 mu m-30 mu m, and the bonding strength is more than 60 MPa.

8. The carbon fiber reinforced composite structure hydraulic cylinder body according to claim 1, characterized in that: the bottom spiral end socket adopts a fixed flat-bottom structure or a hinge type connecting structure.

Technical Field

The invention belongs to the field of mechanical equipment manufacturing, and particularly relates to a carbon fiber reinforced composite structure hydraulic oil cylinder body.

Background

Hydraulic rams are a very important actuator unit (component) for hydraulic devices. Is a special part for various hoisting machines, coal mine machines, special vehicles and engineering machines. However, the existing steel hydraulic cylinder has the disadvantage of heavy weight in production and use, meanwhile, the improvement of the steel structure strength is contradictory to the weight reduction of the cylinder body, and the steel structure has unsatisfactory performance in the aspects of fatigue resistance, corrosion resistance, wear resistance and the like, and is inconvenient in the aspects of installation, maintenance, disassembly, transportation and the like. The problem of heavy weight of the steel hydraulic oil cylinder greatly limits the use of the oil cylinder. Firstly, the development of the main machine to the direction of rice number and large tonnage is restricted due to the overweight of the oil cylinder; secondly, the weight of the oil cylinder is reduced, so that the problem that the engineering machinery cannot be used for registering due to overweight can be solved; thirdly, the problem of high energy consumption and high use cost can be solved to a certain extent by reducing the weight of the oil cylinder.

On the premise of not changing the functional structure of the hydraulic oil cylinder, the invention adopts a composite structure to achieve the purpose of reducing the weight of the traditional hydraulic oil cylinder by selecting low-density and high-strength structural materials and by analog simulation design, thereby realizing the lightweight upgrade of the hydraulic oil cylinder.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and provides a lightweight carbon fiber reinforced composite hydraulic cylinder body manufactured by using a high-strength and high-modulus carbon fiber composite material and a low-density and high-strength aluminum alloy, wherein the lightweight carbon fiber reinforced composite hydraulic cylinder body is improved according to the technical requirements and the requirements of technical indexes of the hydraulic cylinder body under the principle of safety and reliability.

The technical problem to be solved by the invention is realized by adopting the following technical scheme:

the utility model provides a carbon fiber reinforced composite structure hydraulic cylinder body, includes composite structure hydro-cylinder urceolus, piston rod, top spiral head and bottom spiral head, and composite structure hydro-cylinder urceolus is cylindrical tubular structure, coaxial direction slidable mounting piston rod in composite structure hydro-cylinder urceolus, and coaxial mounting has top spiral head and bottom spiral head, its characterized in that respectively at the axial both ends of composite structure hydro-cylinder urceolus: the outer cylinder of the oil cylinder with the composite structure is composed of a thin-wall metal steel cylinder and a carbon fiber reinforced layer, and the carbon fiber reinforced layer is coated on the outer surface of the thin-wall metal steel cylinder.

And the surface of the carbon fiber reinforced layer is subjected to damping protection, and the thickness of the damping protection layer is 3-6 mm.

Furthermore, the installation method of the carbon fiber reinforced layer comprises the following steps: and (3) winding the carbon fiber reinforced layer of the carbon fiber composite material on the outer surface of the thin-wall metal steel cylinder by adopting a dry winding forming process or a wet winding forming process, wherein the winding coating angle is 0-75 degrees.

And the thin-wall metal steel cylinder is made of low-alloy high-strength steel with the yield strength of 550 MPa-650 MPa, the thickness range of the thin-wall metal steel cylinder is 2.5 mm-8.5 mm, the outer surface of the steel cylinder is subjected to shot blasting and passivation treatment, the inner surface of the steel cylinder is subjected to anticorrosive wear-resistant spraying and polishing treatment, the thickness of the coating is 15 mu m-30 mu m, and the bonding strength is more than 60 MPa.

And the matrix material of the carbon fiber reinforced layer is epoxy resin with the glass transition temperature of more than or equal to 120 ℃.

The thickness of the carbon fiber reinforced layer is in the range of 5mm to 30 mm.

And the wall thickness range of the piston rod is 6 mm-30 mm, the surface of the piston rod is sprayed with a wear-resistant layer, the thickness of the wear-resistant and corrosion-resistant layer after surface treatment is 15 mu m-30 mu m, and the bonding strength is more than 60 MPa.

And the bottom spiral end socket adopts a fixed flat-bottom structure or a hinge type connecting structure.

The invention has the advantages and positive effects that:

1. the weight of the hydraulic oil cylinder is reduced: under the condition that the two-piece structure of the traditional hydraulic oil cylinder body is not changed, the outer cylinder of the hydraulic oil cylinder body is manufactured in a light weight mode through the carbon fiber composite material with low density, high strength and high modulus, the piston rod of the hydraulic oil cylinder is manufactured in a light weight mode through aluminum alloy with low specific gravity, high strength and high yield, and the overall weight of the hydraulic oil cylinder is greatly reduced due to the light weight of the main body structure of the hydraulic oil cylinder.

2. The support strength of the hydraulic oil cylinder is improved: the outer cylinder structure of the hydraulic cylinder body is manufactured in a light weight manner by using the high-strength high-modulus carbon fiber composite material, so that the radial strength of the outer cylinder of the hydraulic cylinder body is greatly increased, and the axial support strength is improved; the overall strength of the support is improved.

3. The service life of the hydraulic oil cylinder is prolonged: the outer cylinder and the piston column of the hydraulic oil cylinder with high strength and light weight are main exposed parts. The outer cylinder barrel of the oil cylinder is well protected by winding the carbon fiber composite material, and the wear resistance, the collision resistance and the corrosion resistance of the piston column are greatly improved by surface spraying, so that the overall service life of the novel lightweight hydraulic oil cylinder is greatly prolonged.

4. Improve hydraulic cylinder installation availability factor: novel high strength lightweight hydraulic cylinder has the characteristics of transportation, installation, dismantlement easy and simple to handle, labour saving and time saving, convenient to use and maintenance. The applicability of the hydraulic oil cylinder is greatly improved.

5. On the basis of the traditional low-alloy steel hydraulic cylinder body, the novel composite structure hydraulic cylinder with lighter weight, higher strength, longer service life, safety and reliability is manufactured by using the low-density, high-strength and high-modulus carbon fibers and the low-density and high-strength aluminum alloy to replace the traditional low-alloy steel and applying a novel cylinder body process technology.

Drawings

FIG. 1 is a schematic structural view of a closed state of a cylinder body;

fig. 2 is a schematic structural view of the cylinder in an extended state.

The symbols in FIG. 1 mean: 1, a top oil port, 2 top spiral seal heads, 3 a thin-wall metal steel cylinder, 4 carbon fiber reinforced layers, 5 piston rods, 6 bottom oil ports, 7 bottom spiral seal heads, A cylinder body total closed length, B closed mounting hole distance, L0 cylinder body length, C top spiral seal head thickness, D bottom spiral seal head thickness;

the symbols in fig. 2 mean: 8 wear-resisting layer, L1 expansion stroke, E cylinder body stretch out total length, F stretches out mounting hole distance.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments, which are illustrative only and not limiting, and the scope of the present invention is not limited thereby.

A carbon fiber reinforced composite structure hydraulic cylinder body comprises a composite structure cylinder outer cylinder, a piston rod 5, a top spiral end socket 2 and a bottom spiral end socket 7, wherein the composite structure cylinder outer cylinder is of a cylindrical structure, the piston rod is coaxially and slidably mounted in the composite structure cylinder outer cylinder in a guiding mode, the inner diameter D1 of the composite structure cylinder outer cylinder is larger than the outer diameter D0 of the piston rod, and a cylinder cavity between the inner diameter D1 of the composite structure cylinder outer cylinder and the outer diameter D0 of the piston rod is used for containing hydraulic oil;

a top spiral seal head 2 and a bottom spiral seal head 7 are coaxially arranged at two axial ends of the outer cylinder of the oil cylinder with the composite structure respectively, a top oil port 1 is formed at one radial side of the top spiral seal head and is communicated with the cavity of the oil cylinder; and a bottom oil port 6 is formed in one radial side of the bottom spiral end socket and is communicated with the oil cylinder cavity.

The top spiral end socket 2 has two functions, namely a spiral sealing structure required according to the supporting load of the oil cylinder body, and guiding, sealing and limiting of reciprocating motion of the piston rod 5.

The bottom spiral end socket 7 has two structural forms, namely a fixed flat bottom structure and a hinge type connecting structure, and the size of the bottom end socket is related to the diameter D2 of the thin-wall metal steel cylinder and the diameter D3 of the carbon fiber reinforced layer.

The outer cylinder of the composite-structure oil cylinder comprises a thin-wall metal steel cylinder 3 and a carbon fiber reinforced layer 4, wherein the carbon fiber reinforced layer is coated on the outer surface of the thin-wall metal steel cylinder, the wall thickness is related to the maximum load supported by the hydraulic oil cylinder, the thickness range of the thin-wall metal steel cylinder related to the embodiment is 2.5-8.5 mm, the carbon fiber reinforced layer 4 made of the carbon fiber composite material is prepared on the outer surface of the thin-wall metal steel cylinder by adopting a dry winding forming process or a wet winding forming process, and the winding coating angle is 0-75 degrees. And damping protection can be performed on the surface of the carbon fiber reinforced layer, and the thickness of the damping protection layer is 3-6 mm.

The thin-wall metal steel cylinder 3 is made of low-alloy high-strength steel with the yield strength of 550 MPa-650 MPa, the outer surface of the steel cylinder is subjected to shot blasting and passivation treatment, the inner surface of the steel cylinder is subjected to anti-corrosion wear-resistant spraying and polishing treatment, the thickness of the coating is 15 mu m-30 mu m, and the bonding strength is more than 60 MPa.

The base material of the carbon fiber reinforced layer 4 is epoxy resin with the glass transition temperature of more than or equal to 120 ℃, and the reinforced layer is large-tow carbon fiber with the grade of T700. The thickness of the carbon fiber composite material reinforced layer after construction is related to the maximum load supported by the hydraulic oil cylinder, and the thickness range related by the invention is 5 mm-30 mm.

The wall thickness of the piston rod is related to the maximum load supported by the hydraulic oil cylinder, the thickness range related to the embodiment is 6 mm-30 mm, the surface of the piston rod is sprayed with the wear-resistant layer 8, the thickness of the wear-resistant and corrosion-resistant layer after surface treatment is 15 mu m-30 mu m, and the bonding strength is more than 60 MPa.

Although the embodiments of the present invention and the accompanying drawings are disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the invention and the appended claims, and therefore the scope of the invention is not limited to the disclosure of the embodiments and the accompanying drawings.