CN104558767A - Wear resistant ring as well as preparation method and application thereof - Google Patents
Wear resistant ring as well as preparation method and application thereof Download PDFInfo
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- CN104558767A CN104558767A CN201410811864.1A CN201410811864A CN104558767A CN 104558767 A CN104558767 A CN 104558767A CN 201410811864 A CN201410811864 A CN 201410811864A CN 104558767 A CN104558767 A CN 104558767A
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- C08K13/06—Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
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- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
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Abstract
The invention discloses a wear resistant ring as well as a preparation method and application thereof. The wear resistant ring is prepared from the following raw materials in parts by mass: 100 parts of ultrahigh-molecular-weight polyethylene, 0.1-10 parts of a lubricant, 10-60 parts of a filler, 5-40 parts of polyethylene, 5-40 parts of an antifriction material and 0.1-20 parts of a nano inorganic filler. Because the polyethylene with an ultrahigh molecular weight of more than 1,500,000 is used as the raw material, and the nano inorganic filler and the lubricant are added to modify the ultrahigh-molecular-weight polyethylene, the problem that the ultrahigh-molecular-weight polyethylene is difficult to form due to ultrahigh melt viscosity can be solved, and the ultrahigh-molecular-weight polyethylene can be formed after being extruded by an extruder. The wear resistant ring disclosed by the invention has high mechanical strength and impact resistance and excellent wear resistance and chemical corrosion resistance, is nearly 2 times the service life of the existing most wear resistant ring and can be used for an air cylinder or a hydraulic oil cylinder.
Description
Technical field
The present invention relates to cylinder technical field, relate generally to a kind of wear ring and its preparation method and application.
Background technology
Cylinder is made up of cylinder barrel, cylinder cap, piston, piston rod and sealing member.Cylinder barrel material has high carbon steel, aluminium alloy, brass and stainless steel, and for steel pipe cylinder barrel, internal surface also answers hard chrome plating, with reducing friction resistance and wearing and tearing, and prevents corrosion.Piston is the pressure parts in cylinder, for preventing the two mutual gas blowbies in chamber about piston, is provided with piston ring.Wear ring on piston can improve the guidance quality of cylinder, reduces the abrasion of piston ring, reducing friction resistance.Wear ring uses the high-abrasive material such as urethane, tetrafluoroethylene usually.And wearing and tearing inevitably can appear in wear ring in use for some time, and how to improve the fastness to rubbing of wear ring, extending the work-ing life of wear ring, is also the problem always studied.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art, the object of the present invention is to provide a kind of wear ring and its preparation method and application, described wear ring adopts ultrahigh molecular weight polyethylene(UHMWPE) as raw material, and add nano sized inorganic fillers, lubricant carries out modification, substantially increase the wear resisting property of wear ring, aim to provide a kind of wear ring of super abrasive, extend the work-ing life of wear ring, reduce production cost.
Technical scheme of the present invention is as follows:
A kind of wear ring, wherein, the raw material composition of described wear ring, according to the mass fraction, comprises following component:
Ultrahigh molecular weight polyethylene(UHMWPE) 100 parts;
Lubricant 0.1 ~ 10 part;
Stopping composition 10 ~ 60 parts;
Polyethylene 5 ~ 40 parts;
Antifriction material 5 ~ 40 parts;
Nanometer inorganic filler 0.1 ~ 20 part.
Described wear ring, wherein, described ultrahigh molecular weight polyethylene(UHMWPE) is molecular-weight average is 1,500,000 ~ 8,000,000; Described lubricant is one or more in polyethylene wax, paraffin, stearic acid, calcium stearate, barium stearate, Zinic stearas; Described stopping composition is one or more in glass microballon, ceramic fine bead, aluminum oxide, silicon carbide, norbide; Described antifriction material is one or more in graphite, molybdenumdisulphide, cupric sulfide, bronze powder; Described polyethylene is one or more in high-pressure polyethylene, low pressure polyethylene; Described nanometer inorganic filler is one or more in nano silicon, nano aluminium oxide, nanomete talc powder, nano-calcium carbonate, nano imvite.
Described wear ring, wherein, described stopping composition is through coupling agent activation treatment;
The process of described coupling agent activation treatment is the coupling agent of the total mass 0.5-3.5% getting stopping composition, carries out dilution coupling agent with dehydrated alcohol according to the volume ratio of 8-12:1; Limit is stirred stopping composition limit and is added coupling agent/dehydrated alcohol mixing solutions, after solution is all poured into, continue stirred for several minute, then the baking oven putting into design temperature 90 ± 10 DEG C is dry, and porphyrize after taking out is for subsequent use;
Described coupling agent is one or more in silane coupling agent, titanate coupling agent, aluminate coupling agent.
Described wear ring, wherein, described coupling agent is silane coupling agent.
A preparation method for wear ring as above, wherein, comprises the following steps:
Be equipped with ultrahigh molecular weight polyethylene(UHMWPE) and lubricant in proportion, high-speed stirring to 40 ~ 60 DEG C or 8 ~ 15 minutes; Add polyethylene, antifriction material, nanometer inorganic filler and through the stopping composition of coupling agent activation treatment again, high-speed stirring 3 ~ 5 minutes, discharging;
Wear ring tubular blank or tape stock is extruded by forcing machine;
Wear ring tubular blank is made described wear ring through cutting, ground finish, or wear ring tape stock is made described wear ring through cutting, hot rolling lopping, grinding.
The preparation method of described wear ring, wherein, described extrusion adopts singe screw or twin screw extruder, and the temperature of forcing machine is followed successively by 125 ± 5 DEG C from transportation section to head die, 160 ± 5 DEG C, 250 ~ 290 DEG C, 230 ~ 265 DEG C, 180 ~ 220 DEG C, 190 ~ 235 DEG C, 195 ~ 240 DEG C, 200 ~ 250 DEG C, 190 ~ 235 DEG C.
The preparation method of described wear ring, wherein, the process of described coupling agent activation treatment is the coupling agent of the total mass 0.5-3.5% getting stopping composition, carries out dilution coupling agent with dehydrated alcohol according to the volume ratio of 8-12:1; Limit is stirred stopping composition limit and is added coupling agent/dehydrated alcohol mixing solutions, after solution is all poured into, continue stirred for several minute, then the baking oven putting into design temperature 90 ± 10 DEG C is dry, and porphyrize after taking out is for subsequent use;
Described coupling agent is one or more in silane coupling agent, titanate coupling agent, aluminate coupling agent.
The preparation method of described wear ring, wherein, described coupling agent is silane coupling agent.
An application for wear ring as above, wherein, is used as the wear ring of cylinder or hydraulic ram by described wear ring.
Beneficial effect: wear ring provided by the present invention adopts the ultrahigh molecular weight polyethylene(UHMWPE) of molecular weight more than 1,500,000 to be raw material, and add nano sized inorganic fillers, lubricant carries out modification, solve described ultrahigh molecular weight polyethylene(UHMWPE) melt viscosity high, a difficult problem for processing difficulties, can pass through extruder for shaping.Ultrahigh molecular weight polyethylene(UHMWPE) has the performance such as shock-resistant, wear-resistant, self lubricity, resistance to chemical attack of the unrivaled excellence of other plastics because molecular weight is high, wear resistance is 7 ~ 10 times of carbon steel, stainless 4 times, be the most wear-resisting in known plastic materials, but also the wearing and tearing to mill material can be prevented.Owing to adopting ultra-high molecular weight polyethylene composite material as the raw material of wear ring, wear ring of the present invention is made to have high physical strength and shock-resistance, excellent wearability and chemical resistance, its wearability is compared with the most wear-resisting existing polyurethane wear resistant ring, work-ing life improves nearly 2 times, significantly improve the work-ing life of wear ring, described wear ring can be used as the wear ring of cylinder or hydraulic ram.And the frictional coefficient on wear ring surface is low, smooth surface, can also prevent the abrasion of cylinder barrel.
Embodiment
The invention provides a kind of wear ring and its preparation method and application, for making object of the present invention, technical scheme and effect clearly, clearly, the present invention is described in more detail below.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
A kind of wear ring provided by the present invention, its raw material forms, and according to the mass fraction, comprises following component:
Ultrahigh molecular weight polyethylene(UHMWPE) 100 parts;
Lubricant 0.1 ~ 10 part;
Stopping composition 10 ~ 60 parts;
Polyethylene 5 ~ 40 parts;
Antifriction material 5 ~ 40 parts;
Nanometer inorganic filler 0.1 ~ 20 part.
Described ultrahigh molecular weight polyethylene(UHMWPE) to be molecular-weight average be 1,500,000 ~ 8,000,000 ultrahigh molecular weight polyethylene(UHMWPE).In the present invention by adding nano sized inorganic fillers, lubricant carries out modification to described ultrahigh molecular weight polyethylene(UHMWPE), solve described ultrahigh molecular weight polyethylene(UHMWPE) melt viscosity high, a difficult problem for processing difficulties, can extruder for shaping be passed through.
Described lubricant can choose in polyethylene wax, paraffin, stearic acid, calcium stearate, barium stearate, Zinic stearas one or more.Lubricant is fully adsorbed on ultrahigh molecular weight polyethylene powder surface, plays a part to reduce force of cohesion between polymer molecule, thus improve the internal friction heat-dissipating of ultrahigh molecular weight polyethylene(UHMWPE) melt and the mobility of melt at polymeric inner.
Described stopping composition can choose in glass microballon, ceramic fine bead, aluminum oxide, silicon carbide, norbide one or more.Stopping composition can improve the overall performance of cylinder wear ring, and surface hardness, rigidity, creep properties, flexural strength, heat-drawn wire can be made to be improved preferably; There is certain strengthening action, increase intensity and the wear resistance of cylinder wear ring.
Described stopping composition before being taken into use can through coupling agent activation treatment, due to the existence of coupling agent polar group, Van der Waals force between stopping composition and ultrahigh molecular weight polyethylene(UHMWPE) molecular chain changes look dispersion force into by simple look dispersion force and adds inductive capacity, add the entanglement effect of coupling agent molecule and ultrahigh molecular weight polyethylene(UHMWPE) chain, such stopping composition serves the effect of physical crosslinking point in ultrahigh molecular weight polyethylene(UHMWPE) matrix, and has incorporated the molecular entanglement network of ultrahigh molecular weight polyethylene(UHMWPE).
Described coupling agent can be one or more in silane coupling agent, titanate coupling agent, aluminate coupling agent, preferably selects silane coupling agent (KH550).The process of described coupling agent activation treatment, for getting stopping composition total mass 0.5-3.5% coupling agent, carries out dilution coupling agent with dehydrated alcohol 8-12:1 (volume ratio).The stopping composition weighed up is put into homogenizer stir, add coupling agent/dehydrated alcohol mixing solutions while stirring, stirring is continued 3 ~ 8 minutes after solution is all poured into, discharge stopping composition, put into the baking oven dry a few hours of design temperature 90 ± 10 DEG C again, after taking out, porphyrize is placed in encloses container for subsequent use.
Described antifriction material is one or more in graphite, molybdenumdisulphide, cupric sulfide, bronze powder.Solid lubricant and ultrahigh molecular weight polyethylene(UHMWPE) compound, make lubricant in friction process, progress into frictional interface lubricate, the object controlling ultrahigh molecular weight polyethylene(UHMWPE) friction and wear can be reached, and stopping composition can be improved add rear frictional coefficient and increase the loss causing sliding.
Described polyethylene is one or more in high-pressure polyethylene, low pressure polyethylene.High-pressure polyethylene and super-high molecular weight polythene blending is preferably added in the present invention, the defect such as solve the flexibility difference of ultrahigh molecular weight polyethylene(UHMWPE), fragility greatly easily fractures, improve elongation at break and the toughness of wear ring, make the wear ring made have good flexural property.
Described nanometer inorganic filler can choose in silicon-dioxide, nano aluminium oxide, nanomete talc powder, nano-calcium carbonate, nano imvite one or more.Due to its nanometer size effect of nanometer inorganic filler, large specific surface area and strong interfacial interaction, the interfacial tension between inorganic fillings and ultrahigh molecular weight polyethylene(UHMWPE) matrix can be eliminated, the bonding interface of realizing ideal, eliminate inorganic fillings and the unmatched problem of ultrahigh molecular weight polyethylene(UHMWPE) matrix two material thermal expansivity, therefore the excellent mechanical performance of inorganic fillings can be given full play to, can by the rigidity of inorganic fillings, dimensional stability and thermostability and ultrahigh molecular weight polyethylene(UHMWPE) shock-resistant, wear-resistant, self lubricity, the performance perfect adaptations such as resistance to chemical attack, give cylinder wear ring more high strength, modulus, wear-resisting, impact strength performance, and have toughening effect.
In technical solution of the present invention, the preparation method of described wear ring is also provided, comprises the following steps:
Be equipped with ultrahigh molecular weight polyethylene(UHMWPE) and lubricant in proportion, add in homogenizer high-speed stirring to 40 ~ 60 DEG C or 8 ~ 15 minutes; Add polyethylene, antifriction material, nanometer inorganic filler and through the stopping composition of coupling agent activation treatment again, high-speed stirring 3 ~ 5 minutes, discharging is for subsequent use;
Wear ring tubular blank or tape stock is extruded by forcing machine;
Wear ring tubular blank makes described wear ring through cutting, ground finish; If tape stock, then make described wear ring through cutting, hot rolling lopping, grinding.
Wherein, described extrusion adopts singe screw or twin screw extruder, and the temperature of forcing machine is followed successively by 125 ± 5 DEG C from transportation section to head die, 160 ± 5 DEG C, 250 ~ 290 DEG C, 230 ~ 265 DEG C, 180 ~ 220 DEG C, 190 ~ 235 DEG C, 195 ~ 240 DEG C, 200 ~ 250 DEG C, 190 ~ 235 DEG C.Extrude obtained wear ring tubular blank.
In technical solution of the present invention, also provide a kind of cylinder, described cylinder is identical with existing air cylinder structure, comprise cylinder barrel, cylinder cap, piston, piston rod and sealing member etc., in the present invention program, only the material of wear ring and cylinder barrel is improved, therefore, other structures are not repeated herein.The structure of described cylinder comprises cylinder barrel, piston and wear ring, and described wear ring is arranged on the outer wall of piston and the junction of cylinder barrel.Described wear ring adopts above-mentioned wear ring, provides the performances such as shock-resistant, wear-resistant, the self lubricity of cylinder, resistance to chemical attack.
Further, described cylinder barrel also adopts ultra-high molecular weight polyethylene composite material to be that raw material is made.When cylinder runs to mill element cylinder barrel and wear ring, make owing to all adopting ultra-high molecular weight polyethylene composite material, frictional coefficient is extremely low, between same material to mill under the lubrication of water or oil frictional coefficient close between ice and ice to mill, cylinder of the present invention is made to have excellent wearability and erosion resistance, fabulous sliding, significantly improves the work-ing life of cylinder.
Concrete, described cylinder barrel, its raw material forms, and according to the mass fraction, comprises following component:
1, ultrahigh molecular weight polyethylene(UHMWPE) 100 parts;
2, lubricant 0.1 ~ 10 part;
3, stopping composition 10 ~ 60 parts;
4, reinforcing fiber 5 ~ 40 parts;
5, antifriction material 5 ~ 40 parts;
6, nanometer inorganic filler 1 ~ 20 part.
Described ultrahigh molecular weight polyethylene(UHMWPE), lubricant, stopping composition, antifriction material, nanometer inorganic filler raw material range of choices are identical with cylinder barrel.Reinforcing fiber and stopping composition also through coupling agent activation treatment, are not repeated herein before use.
Described reinforcing fiber is one or more in superhigh molecular weight polyethylene fibers, polyster fibre, basalt fibre, carbon fiber, glass fibre.Reinforcing fiber permeates equably in ultrahigh molecular weight polyethylene(UHMWPE) matrix, they are wound around mutually, define a kind of fiber reinforcement, it can limit anisotropic shrinkage, remarkable reduction warpage, improve the dimensional stability of cylinder barrel, its reinforced effects improves bending elastic modulus, flexural strength, tensile strength, the shock strength of cylinder barrel.Described reinforcing fiber and stopping composition before being taken into use can also through coupling agent activation treatment.
The production method of described cylinder barrel, comprises the following steps:
Step 1: extrude cylinder barrel tubular blank by forcing machine.
A, be equipped with ultrahigh molecular weight polyethylene(UHMWPE) and lubricant in proportion, add in homogenizer high-speed stirring to 40 ~ 60 DEG C or 8 ~ 15 minutes; Add antifriction material, nanometer inorganic filler and through stopping composition, the reinforcing fiber of coupling agent activation treatment again, high-speed stirring 3 ~ 5 minutes, discharging is for subsequent use.
B, extrude cylinder barrel tubular blank by forcing machine: singe screw or twin screw extruder can be adopted, the temperature of forcing machine is followed successively by 125 ± 5 DEG C from transportation section to head die, 160 ± 5 DEG C, 250 ~ 290 DEG C, 230 ~ 265 DEG C, 180 ~ 220 DEG C, 190 ~ 235 DEG C, 195 ~ 240 DEG C, 200 ~ 250 DEG C, 190 ~ 235 DEG C.
Step 2: cylinder barrel tubular blank to be cut, inner bore honing processing, obtained cylinder barrel.
After cylinder and wear ring prepare, just by the cylinder of cylinder with wear ring assembly cost invention self-lubricating abrasion-resistant together with other parts.Owing to all adopting ultra-high molecular weight polyethylene composite material as raw material to mill element cylinder barrel and wear ring, when cylinder runs, frictional coefficient is extremely low, between same material to mill under the lubrication of water or oil frictional coefficient close between ice and ice to mill, there is excellent wearability and erosion resistance, fabulous sliding, significantly improves the work-ing life of cylinder.And, replace metallic substance with plastics, reduce production cost.Due to wear ring excellent performance of the present invention, in the present invention program, also provide the application of described wear ring, by described wear ring for the preparation of hydraulic ram or cylinder.
The present invention will be further described by the following examples.
Embodiment 1
Stopping composition and reinforcing fiber have all carried out coupling agent activation treatment:
Get the 1%KH550 of stopping composition or reinforcing fiber total mass, carry out dilution KH550 with dehydrated alcohol 10:1 (volume ratio).The stopping composition weighed up or reinforcing fiber are put into homogenizer stir, add KH550/ dehydrated alcohol mixing solutions while stirring, stirring is continued 5 minutes after solution is all poured into, discharge stopping composition or reinforcing fiber, put into dry 5 hours of the baking oven of design temperature 80 DEG C again, after taking out, porphyrize is placed in encloses container for subsequent use.
Prepare cylinder barrel:
Get 100 portions of ultrahigh molecular weight polyethylene(UHMWPE)s and lubricant stearic acid 1 part, calcium stearate 1.5 parts to drop into high speed mixer high speed and be stirred to 50 DEG C, allow lubricant fully be adsorbed on ultrahigh molecular weight polyethylene powder surface; Add by glass microballon 20 parts, the basalt fibre 10 parts of KH550 coupling agent activation treatment again, Graphite Powder 99 5 parts, nano silicon 6 parts, high-speed stirring after 3 minutes discharging for subsequent use.
The temperature of single screw extrusion machine is followed successively by 125 DEG C from transportation section to head die, 160 DEG C, 265 DEG C, 240 DEG C, 190 DEG C, 195 DEG C, 200 DEG C, 205 DEG C, 200 DEG C; Cylinder barrel tubular blank is extruded by forcing machine head mould.Cylinder barrel tubular blank is cut, inner bore honing processing, obtained cylinder barrel.
Prepare wear ring:
Get 100 portions of ultrahigh molecular weight polyethylene(UHMWPE)s and 2 parts, lubricant polyethylene wax, calcium stearate 5 parts to drop into high speed mixer high speed and be stirred to 60 DEG C, allow lubricant fully be adsorbed on ultrahigh molecular weight polyethylene powder surface; Add by the glass microballon 10 parts of KH550 coupling agent activation treatment again, high-pressure polyethylene 30 parts, Graphite Powder 99 6 parts, nano aluminium oxide 10 parts, high-speed stirring after 3 minutes discharging for subsequent use.
The temperature of single screw extrusion machine is followed successively by 125 DEG C from transportation section to head die, 160 DEG C, 260 DEG C, 235 DEG C, 190 DEG C, 190 DEG C, 195 DEG C, 200 DEG C, 195 DEG C; Obtained wear ring tubular blank is extruded by forcing machine.Wear ring tubular blank, through cutting, ground finish, obtains cylinder wear ring.
Assembling cylinder:
Wear ring is arranged on cylinder piston; Cylinder barrel and cylinder cap, piston, piston rod and sealing member are assembled and are made self-lubricating abrasion-resistant cylinder.
Through detecting, cylinder barrel surface hardness can reach Rockwell 40, has good dimensional stability, shock-resistance simultaneously, and wear resisting property is good, corrosion-resistant, smooth surface, rigidity high.Cylinder wear ring tensile strength 38.0Mpa, elongation at break reaches 290%, and wear resistance is 2 times of polyurethane wear resistant ring.Cylinder barrel and wear ring are self-lubricating 0.12 to the kinetic friction coefficient ground, water lubricating 0.06, and low to mill noise.
Embodiment 2
Stopping composition and reinforcing fiber have all carried out coupling agent activation treatment:
Get the 2%KH550 of stopping composition or reinforcing fiber total mass, carry out dilution KH550 with dehydrated alcohol 10:1 (volume ratio).The stopping composition weighed up or reinforcing fiber are put into homogenizer stir, add KH550/ dehydrated alcohol mixing solutions while stirring, stirring is continued 5 minutes after solution is all poured into, discharge stopping composition or reinforcing fiber, put into dry 5 hours of the baking oven of design temperature 80 DEG C again, after taking out, porphyrize is placed in encloses container for subsequent use.
Prepare cylinder barrel:
Get 100 portions of ultrahigh molecular weight polyethylene(UHMWPE)s and 3 parts, lubricant paraffin, Zinic stearas 3 parts to drop into high speed mixer high speed and be stirred to 60 DEG C, allow lubricant fully be adsorbed on ultrahigh molecular weight polyethylene powder surface; Add by 18 parts, silicon carbide, 10 parts, the carbon fiber of KH550 coupling agent activation treatment again, Graphite Powder 99 6 parts, nano silicon 6 parts, high-speed stirring after 5 minutes discharging for subsequent use.
The temperature of twin screw extruder is followed successively by 125 DEG C from transportation section to head die, 160 DEG C, 265 DEG C, 240 DEG C, 190 DEG C, 195 DEG C, 200 DEG C, 205 DEG C, 200 DEG C; Cylinder barrel tubular blank is extruded by forcing machine head mould.Cylinder barrel tubular blank is cut, inner bore honing processing, obtained cylinder barrel.
Prepare wear ring:
Get 100 portions of ultrahigh molecular weight polyethylene(UHMWPE)s and lubricant stearic acid 3 parts, barium stearate 4 parts to drop into high speed mixer high speed and be stirred to 60 DEG C, allow lubricant fully be adsorbed on ultrahigh molecular weight polyethylene powder surface; Add by the glass microballon 18 parts of KH550 coupling agent activation treatment again, low pressure polyethylene 30 parts, Graphite Powder 99 6 parts, nanomete talc powder 10 parts, high-speed stirring after 3 minutes discharging for subsequent use.
The temperature of twin screw extruder is followed successively by 125 DEG C from transportation section to head die, 160 DEG C, 260 DEG C, 235 DEG C, 190 DEG C, 190 DEG C, 195 DEG C, 200 DEG C, 195 DEG C; Obtained wear ring tape stock is extruded by forcing machine.Cylinder wear ring tape stock, through cutting, hot rolling lopping, ground finish, obtains wear ring.
Assembling cylinder:
Wear ring is arranged on cylinder piston; Cylinder barrel and cylinder cap, piston, piston rod and sealing member are assembled and are made self-lubricating abrasion-resistant cylinder.
Through detecting, cylinder barrel surface hardness can reach Rockwell 45, has good dimensional stability, shock-resistance simultaneously, and wear resisting property is good, corrosion-resistant, smooth surface, rigidity high.Cylinder wear ring tensile strength 37.0Mpa, elongation at break reaches 295%, and wear resistance is 2 times of polyurethane wear resistant ring.Cylinder barrel and wear ring are self-lubricating 0.11 to the kinetic friction coefficient ground, water lubricating 0.05, and low to mill noise.
Embodiment 3
Stopping composition and reinforcing fiber have all carried out coupling agent activation treatment:
Get 3% titanate coupling agent of stopping composition or reinforcing fiber total mass, carry out dilution titanate coupling agent with dehydrated alcohol 10:1 (volume ratio).The stopping composition weighed up or reinforcing fiber are put into homogenizer stir, add titanate coupling agent/dehydrated alcohol mixing solutions while stirring, stirring is continued 5 minutes after solution is all poured into, discharge stopping composition or reinforcing fiber, put into dry 5 hours of the baking oven of design temperature 90 DEG C again, after taking out, porphyrize is placed in encloses container for subsequent use.
Get 100 portions of ultrahigh molecular weight polyethylene(UHMWPE)s and 3 parts, lubricant polyethylene wax, Zinic stearas 3 parts to drop into high speed mixer high speed and be stirred to 60 DEG C, allow lubricant fully be adsorbed on ultrahigh molecular weight polyethylene powder surface; Add by 60 parts, silicon carbide, 30 parts, the carbon fiber of KH550 coupling agent activation treatment again, copper powder 20 parts, nanomete talc powder 10 parts, high-speed stirring after 5 minutes discharging for subsequent use.
The temperature of single screw extrusion machine is followed successively by 125 DEG C from transportation section to head die, 160 DEG C, 280 DEG C, 260 DEG C, 200 DEG C, 220 DEG C, 225 DEG C, 230 DEG C, 225 DEG C; Cylinder barrel tubular blank is extruded by forcing machine head mould.
Cylinder barrel tubular blank is cut, inner bore honing processing, obtained cylinder barrel.
Prepare wear ring:
Get 100 portions of ultrahigh molecular weight polyethylene(UHMWPE)s and lubricant stearic acid 3 parts, Zinic stearas 2.5 parts to drop into high speed mixer high speed and be stirred to 40 DEG C, allow lubricant fully be adsorbed on ultrahigh molecular weight polyethylene powder surface; Add by 30 parts, the aluminum oxide of coupling agent activation treatment again, high-pressure polyethylene 40 parts, molybdenumdisulphide 20 parts, nano-calcium carbonate 10 parts, high-speed stirring after 3 minutes discharging for subsequent use.
The temperature of twin screw extruder is followed successively by 125 DEG C from transportation section to head die, 160 DEG C, 260 DEG C, 235 DEG C, 190 DEG C, 190 DEG C, 195 DEG C, 200 DEG C, 195 DEG C; Obtained wear ring tape stock is extruded by forcing machine.Cylinder wear ring tape stock, through cutting, hot rolling lopping, ground finish, obtains wear ring.
Assembling cylinder:
Wear ring is arranged on cylinder piston; Cylinder barrel and cylinder cap, piston, piston rod and sealing member are assembled and are made self-lubricating abrasion-resistant cylinder.
Through detecting, cylinder barrel surface hardness can reach Rockwell 45, has good dimensional stability, shock-resistance simultaneously, and wear resisting property is good, corrosion-resistant, smooth surface, rigidity high.Cylinder wear ring tensile strength 37.0Mpa, elongation at break reaches 295%, and wear resistance is 2 times of polyurethane wear resistant ring.Cylinder barrel and wear ring are self-lubricating 0.11 to the kinetic friction coefficient ground, water lubricating 0.05, and low to mill noise.
In sum, wear ring provided by the present invention adopts the ultrahigh molecular weight polyethylene(UHMWPE) of molecular weight more than 1,500,000 to be raw material, by adding nano sized inorganic fillers, lubricant carries out modification, solve described ultrahigh molecular weight polyethylene(UHMWPE) melt viscosity high, add a difficult problem for type difficulty, can extruder for shaping be passed through.Wear ring of the present invention has high physical strength and shock-resistance, excellent wearability and chemical resistance, and its wearability is compared with the most wear-resisting existing polyurethane wear resistant ring, and work-ing life improves nearly 2 times, significantly improves the work-ing life of wear ring.
Should be understood that, application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to claims of the present invention.
Claims (9)
1. a wear ring, is characterized in that, the raw material composition of described wear ring, according to the mass fraction, comprises following component:
Ultrahigh molecular weight polyethylene(UHMWPE) 100 parts;
Lubricant 0.1 ~ 10 part;
Stopping composition 10 ~ 60 parts;
Polyethylene 5 ~ 40 parts;
Antifriction material 5 ~ 40 parts;
Nanometer inorganic filler 0.1 ~ 20 part.
2. wear ring according to claim 1, is characterized in that, described ultrahigh molecular weight polyethylene(UHMWPE) is molecular-weight average is 1,500,000 ~ 8,000,000; Described lubricant is one or more in polyethylene wax, paraffin, stearic acid, calcium stearate, barium stearate, Zinic stearas; Described stopping composition is one or more in glass microballon, ceramic fine bead, aluminum oxide, silicon carbide, norbide; Described antifriction material is one or more in graphite, molybdenumdisulphide, cupric sulfide, bronze powder; Described polyethylene is one or more in high-pressure polyethylene, low pressure polyethylene; Described nanometer inorganic filler is one or more in nano silicon, nano aluminium oxide, nanomete talc powder, nano-calcium carbonate, nano imvite.
3. wear ring according to claim 1, is characterized in that, described stopping composition is through coupling agent activation treatment;
The process of described coupling agent activation treatment is the coupling agent of the total mass 0.5-3.5% getting stopping composition, carries out dilution coupling agent with dehydrated alcohol according to the volume ratio of 8-12:1; Limit is stirred stopping composition limit and is added coupling agent/dehydrated alcohol mixing solutions, after solution is all poured into, continue stirred for several minute, then the baking oven putting into design temperature 90 ± 10 DEG C is dry, and porphyrize after taking out is for subsequent use;
Described coupling agent is one or more in silane coupling agent, titanate coupling agent, aluminate coupling agent.
4. wear ring according to claim 3, is characterized in that, described coupling agent is silane coupling agent.
5. a preparation method for the wear ring as described in as arbitrary in claim 1-2, is characterized in that, comprise the following steps:
Be equipped with ultrahigh molecular weight polyethylene(UHMWPE) and lubricant in proportion, high-speed stirring to 40 ~ 60 DEG C or 8 ~ 15 minutes; Add polyethylene, antifriction material, nanometer inorganic filler and through the stopping composition of coupling agent activation treatment again, high-speed stirring 3 ~ 5 minutes, discharging;
Wear ring tubular blank or tape stock is extruded by forcing machine;
Wear ring tubular blank is made described wear ring through cutting, ground finish, or wear ring tape stock is made described wear ring through cutting, hot rolling lopping, grinding.
6. the preparation method of wear ring according to claim 5, it is characterized in that, described extrusion adopts singe screw or twin screw extruder, and the temperature of forcing machine is followed successively by 125 ± 5 DEG C from transportation section to head die, 160 ± 5 DEG C, 250 ~ 290 DEG C, 230 ~ 265 DEG C, 180 ~ 220 DEG C, 190 ~ 235 DEG C, 195 ~ 240 DEG C, 200 ~ 250 DEG C, 190 ~ 235 DEG C.
7. the preparation method of wear ring according to claim 5, is characterized in that, the process of described coupling agent activation treatment is the coupling agent of the total mass 0.5-3.5% getting stopping composition, carries out dilution coupling agent with dehydrated alcohol according to the volume ratio of 8-12:1; Limit is stirred stopping composition limit and is added coupling agent/dehydrated alcohol mixing solutions, after solution is all poured into, continue stirred for several minute, then the baking oven putting into design temperature 90 ± 10 DEG C is dry, and porphyrize after taking out is for subsequent use;
Described coupling agent is one or more in silane coupling agent, titanate coupling agent, aluminate coupling agent.
8. the preparation method of wear ring according to claim 7, is characterized in that, described coupling agent is silane coupling agent.
9. an application for the wear ring as described in Claims 1 to 4, is characterized in that, described wear ring is used as the wear ring of cylinder or hydraulic ram.
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| CN105099348A (en) * | 2015-09-01 | 2015-11-25 | 南通友邦金塑制品有限公司 | Support device of photovoltaic panel support beam |
| CN106626501A (en) * | 2016-12-23 | 2017-05-10 | 重庆龙悦食品有限公司 | Dried bean curd extrusion device |
| CN107586407A (en) * | 2017-09-20 | 2018-01-16 | 镇江市胜得机械制造有限责任公司 | A kind of reinforcing agent for being used to produce rubber belt track |
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| CN105099348A (en) * | 2015-09-01 | 2015-11-25 | 南通友邦金塑制品有限公司 | Support device of photovoltaic panel support beam |
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| CN106626501A (en) * | 2016-12-23 | 2017-05-10 | 重庆龙悦食品有限公司 | Dried bean curd extrusion device |
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