KR20140001700A - Composition of surface coating for compressor sliding part and compressor sliding part using thereof - Google Patents

Abstract

The present invention relates to a surface coating composition of a compressor sliding part and, more specifically, to a surface coating composition which includes organosilane compounds and inorganic metallic compounds. Also, the present invention relates to a compressor sliding part with a first coating layer formed by primary coating with a surface coating composition. The present invention relates to a surface coating composition of a compressor sliding part and a compressor sliding part, which improves lubrication of the sliding part, and adhesion, lubrication, durability of a sliding composition by forming a second coating layer by secondary coating the surface of the compressor sliding part with the sliding composition.

Description

TECHNICAL FIELD [0001] The present invention relates to a composition for surface coating of a compressor sliding part, and a compressor sliding part coated with the same. BACKGROUND ART < RTI ID = 0.0 >

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composition for surface coating of compressor sliding parts, and more particularly to a composition for surface coating comprising an organosilane compound and an inorganic metal compound. Also, the present invention relates to a compressor sliding part formed by coating a first coating layer with the composition for surface coating, wherein a sliding composition is secondarily coated on a surface of a compressor sliding part coated with the first coating layer to form a second coating layer To a composition for surface coating of a compressor sliding part which improves the lubrication characteristics of the sliding part and improves the adhesion, lubricity and durability of the sliding composition, and a compressor sliding part coated therewith.

Generally, an air conditioner for an automobile compresses refrigerant flowing on a flow path in a compressor, compresses the compressed refrigerant in a condenser, and then sends the condensed refrigerant to an expansion valve. The compressor used for compressing the refrigerant in the automotive air conditioner operates to suck the vaporized heat exchange medium in the evaporator, to compress the sucked heat exchange medium and to pump the compressed heat exchange medium, To be circulated. There are various types of compressors such as a swash plate type, a scroll type, a rotary type, and a wobble plate type according to a driving method.

In general, a swash plate type compressor, which is generally used as a compressor of an automotive air conditioner, has a swash plate fixed to an axis of rotation and a plurality of shovels inserted into the swash plate. The rotating shaft, which receives the power of the engine selectively by the intermittent action of the electromagnetic clutch, is rotated, and the disk-shaped swash plate installed on the rotating shaft rotates. By the rotation of the swash plate, the swash plate is sealed before and after the swash plate, So that the expansion or compression of the cooling medium becomes possible by changing the volume of the space inside the compressor. The cooling medium is drawn from the suction chamber, sucked and compressed in the bore, and the compressed cooling medium is discharged from the discharge chamber. Korean Patent Laid-Open No. 10-2004-0091935 (Patent Document 1) discloses an electric swash plate compressor in more detail.

In order to smoothly perform the reciprocating friction movement of the swash plate, it is necessary to lubricate the sliding parts such as the front and rear surfaces of the swash plate and the shoe surface in order to reduce the friction coefficient between the swash plate and the shoe. If the abrupt friction between the shoe and the swash plate occurs during the initial operation without supplying the lubricating oil, the sliding surface of the swash plate may be separated from the shoe. Accordingly, various suitable methods that meet the severe operating conditions of the compressor have been proposed.

A method of improving rust prevention, corrosion resistance and lubrication characteristics by using an alloy material such as copper, zinc, aluminum, iron, chromium or the like superior in lubrication property as a swash plate material as a swash plate has been disclosed in the past, And an increase in the process cost such as alloy processing and machining of these materials, resulting in economical problems. Also, the friction coefficient of the swash plate is high, so that noise is generated during high-speed rotation, the consumption power is increased, and the efficiency is decreased.

Japanese Patent Application Laid-Open No. 1996-199328 (Patent Document 2) discloses a method of improving lubrication properties by forming a film by spraying fine particles such as FeMo or FeCr onto the surface of a swash plate of a copper alloy containing zinc. However, There arises a problem that the coating film formed at the time of long-term operation is deteriorated due to aging.

In recent years, Japanese Laid-Open Patent Application No. 2009-62935 (Patent Document 3) discloses a method of improving the lubrication property by coating a polyimide resin or a polyamideimide resin with a solid lubricant on the surface of the swash plate, Patent Document No. 2009-191284 (Patent Document 4) discloses a metal surface treatment agent comprising an acrylic emulsion, a polyaldehyde, silica, a metal compound and a silane coupling agent on a zinc alloy steel sheet. However, since the polymeric resin serving as an adhesive for an inorganic material such as a solid lubricant or silica has a different thermal expansion coefficient from that of the metal surface or has poor affinity, the problem of severe friction or peeling of the sliding parts due to separation from the swab surface during long- . Therefore, in order to increase the adhesion between the swash plate and the metal surface treatment agent of the polymer material, the surface of the swash plate is subjected to a sand blast treatment to improve the adhesion to the polymer material by roughening the surface roughness or the surface pretreatment with chromate, metal phosphate, However, the effect is not maintained by simple physical methods such as surface roughness control. The chromate treatment is practically prohibited due to environmental problems, and the metal Phosphate treatment has little effect on improving the adhesion.

Therefore, it is an object of the present invention to provide an effective method for maximizing the physicochemical lubrication properties of the swash plate surface for the purpose of reducing the corrosion resistance of the swash plate surface material, the adhesion of the slip composition film, the impact resistance of the slip composition under high- It is absolutely necessary to present a chemical surface treatment and a coating method of a sliding composition.

Korean Patent Publication No. 10-2004-0091935 (November 3, 2004) Japanese Patent Laid-Open No. 1996-199328 (Aug. 1996) Japanese Patent Laid-Open No. 2009-62935 (Mar. 26, 2009) Japanese Patent Application Laid-Open No. 2009-191284 (2009.08.27)

SUMMARY OF THE INVENTION It is an object of the present invention to overcome the problems described above and to provide a lubricating and durability And to provide a composition for surface coating of a sliding component of a compressor.

Another object of the present invention is to provide a compressor sliding part in which a first coating layer is formed by first coating a composition for surface coating of a compressor sliding part on a base material for manufacturing the compressor sliding part.

Another object of the present invention is to provide a compressor sliding component in which a second coating layer is formed by coating a sliding composition on the surface of a compressor sliding component having the first coating layer formed thereon.

In order to accomplish the above object, the present invention provides a surface coating composition comprising an organosilane compound and an inorganic metal compound.

The organosilane compound may be one or more selected from compounds represented by the following general formula (1).

[Formula 1]

Wherein R ₁ is (C ₁ -C 10) alkyl and R ₂ , R ₃ and R ₄ are each independently selected from the group consisting of (C 1 -C 20) alkyl, (C 1 -C 20) alkoxy, glycidoxy C10) alkyl, amino (C1-C10) alkyl, (C3-C20) cycloalkyl, (C5-C20) are (C1-C20) is selected from alkyl, wherein R _2, R ₃ and R ₄ are at the same time, (C1- C20) < / RTI > alkoxy,

Alkyl, alkoxy, glycidoxyalkyl, aminoalkyl, cycloalkyl, aralkyl of R ₂ , R ₃ and R ₄ is (C 1 -C 5) alkyl, amino, cyano, (C 3 -C 10) cycloalkyl, -C20) aryl and glycidyl. ≪ / RTI >

Preferably, the organosilane compound is selected from the group consisting of 3-glycidoxypropyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, Ethyl trimethoxysilane, butyl trimethoxysilane, isobutyltriethoxysilane, isobutyl trimethoxysilane, hexadecyl trimethoxysilane, hexadecyl triethoxysilane, hexyltrimethoxysilane, hexyltriethoxysilane Aminopropyltrimethoxysilane, 3-aminopropyltrimethoxysilane, 2-aminoethyltrimethoxysilane, 3-aminopropyltrimethoxysilane, 3-aminopropyltrimethoxysilane, 2-aminoethyltrimethoxysilane, 2-methylpropyltrimethoxysilane, 4-aminobutyltrimethoxysilane, N-ethylaminoisobutyltrimethoxysilane and 4-amino-3-methylbutyltrimethoxysilane. have.

Wherein the composition for surface coating of the compressor sliding component comprises at least one protonic solvent selected from water, (C1-C7) lower alcohols or mixtures thereof, wherein the organosilane compound is present in the protonic solvent solvent and 0.1 to 5% by weight based on 100% by weight of the organosilane compound.

The inorganic metal compound may be selected from metal phosphate, metal nitrate or metal fluoride, and preferably the metal phosphate is selected from the group consisting of aluminum phosphate, zinc phosphate, magnesium phosphate, manganese phosphate, iron phosphate or zinc phosphate Wherein the metal nitrate is one or more selected from the group consisting of magnesium nitrate, manganese nitrate, lanthanum nitrate, neodymium nitrate, and cerium nitrate, and the metal fluoride is lithium hexafluorosilicate ( LiSiF _6), silicate (MgSiF _6), hydro-fluorene silicic acid (H ₂ SiF _6), fluorenyl zirconium conic acid (H ₂ ZrF _6), fluorenyl titanium acid (H ₂ TiF ₆ to a magnesium-hexafluoro), fluorenyl half acid ( H ₂ HfF ₆ ) may be selected.

The weight ratio of the organosilane compound to the inorganic metal compound may be 1:20 to 20: 1. The weight ratio of the organosilane compound to the inorganic metal compound may be in the range of 1:20 to 20: 1. have.

Further, the first coating layer 300 may be formed by first coating the surface coating composition on the surface of the base material A for manufacturing the compressor sliding part, and the first coating layer 300 of the compressor sliding part P may be formed. (300) The coating thickness may be between 1 and 200 nm.

The sliding composition may be coated on the surface of the compressor sliding part P where the first coating layer 300 is formed to form a second coating layer 400. The sliding composition may be a silicone polyester resin, a polyamide- Wherein the solid lubricant is at least one selected from the group consisting of polytetrafluoroethylene (PTFE), graphite, molybdenum disulfide, tungsten disulfide, and boron nitride among at least one resin selected from among polyimide resins and epoxy resins, solid lubricants and abrasion- And the wear resistant material may include at least one of alumina, titanium dioxide and zirconia.

The surface roughness of the compressor sliding part (P) And the Rz value is 5 to 15 占 퐉. The compressor sliding part (P) may be selected from one or more of swash plate, sliding bearing, shoe, and piston.

The first coating layer is formed on the surface of the compressor sliding part by coating the composition for surface coating of the compressor sliding part containing the organosilane compound and the inorganic metal compound of the present invention to form a first coating layer, Not only improves the adhesion, but also serves as a protective coating for the sliding parts of the compressor, thereby minimizing damage to parts even during long-term operation, thereby improving durability by improving physical properties such as corrosion resistance, heat resistance and fatigue hardness.

Further, by forming the second coating layer by coating the sliding composition on the surface of the compressor sliding component having the first coating layer formed thereon, the sliding composition can be peeled off even under severe operating conditions and corrosive environments of the compressor sliding component made of metal such as iron or aluminum alloy And an excellent lubricating property is exhibited.

1 is a cross-sectional view of a compressor sliding part according to a first aspect of the present invention;
2 is a sectional view of a compressor sliding part according to a second aspect of the present invention;
3 is a front sectional view of a variable displacement swash plate type compressor.

Hereinafter, the composition for surface coating of a compressor sliding part of the present invention and the compressor sliding part P having the first coating layer 300 coated therewith will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown.

The first aspect of the present invention provides a composition for surface coating of a compressor sliding part comprising an organosilane compound and an inorganic metal compound, wherein the composition for surface coating is applied to a base material A The first coating layer 300 is formed on the surface of the first coating layer 300.

The composition for surface coating of the compressor sliding part preferably includes at least one protonic solvent selected from water, (C1-C7) lower alcohol or a mixture thereof in addition to the organosilane compound and the inorganic metal compound. The organosilane compound and the inorganic metal compound are dispersed in the protonic solvent without precipitation or agglomeration, thereby forming a uniform coating layer on the surface of the swash plate.

The organosilane compound is added to the composition for surface coating together with the inorganic metal compound to improve the adhesion between the base material (A) for producing the compressor sliding part and the second coating layer (400) coated with the sliding composition And is preferably one or more selected from compounds represented by the following general formula (1).

[Formula 1]

Wherein R ₁ is (C ₁ -C 10) alkyl and R ₂ , R ₃ and R ₄ are each independently selected from the group consisting of (C 1 -C 20) alkyl, (C 1 -C 20) alkoxy, glycidoxy C10) alkyl, amino (C1-C10) alkyl, (C3-C20) cycloalkyl, (C5-C20) is selected from aralkyl, wherein R _2, R ₃ and R ₄ are at the same time, (C1-C20) not an alkoxy ,

Alkyl, alkoxy, glycidoxyalkyl, aminoalkyl, cycloalkyl, aralkyl of R ₂ , R ₃ and R ₄ is (C 1 -C 5) alkyl, amino, cyano, (C 3 -C 10) cycloalkyl, -C20) aryl or glycidyl. ≪ / RTI >

The term " alkyl ", as used herein, refers to straight or branched saturated hydrocarbon radicals including, but not limited to, methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl and the like.

The term " alkoxy " as used herein means a radical -OR as defined above. Examples of alkoxy radicals include methoxy, ethoxy, isopropoxy, butoxy, sec-butoxy, isobutoxy But is not limited thereto.

The "(C3-C20) cycloalkyl" described in the present invention includes both saturated monocyclic or saturated bicyclic ring structure forms having 3 to 20 carbon atoms.

&Quot; aryl " as used in the present invention means an organic radical derived from an aromatic hydrocarbon by one hydrogen elimination, in which each ring is optionally substituted with one to four, preferably five or six, Or fused ring systems. Specific examples include, but are not limited to, phenyl, naphthyl, biphenyl, tolyl, and the like.

&Quot; Arylalkyl ", as defined herein, refers to a -R'R'-radical, where R'is an aryl radical as defined herein and R'is an alkyl radical as defined herein. Examples of aralkyl radicals include, but are not limited to, benzyl, phenylethyl, 3-phenylpropyl, and the like.

More specifically, the organosilane compound of the present invention may include 3-glycidoxypropyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, 3-glycidoxypropyl Methyldimethoxysilane, ethyltrimethoxysilane, butyltrimethoxysilane, isobutyltriethoxysilane, isobutyltrimethoxysilane, hexadecyltrimethoxysilane, hexadecyltriethoxysilane, hexyltrimethoxysilane, hexyltrimethoxysilane, Hexyltriethoxysilane, octyltriethoxysilane, isooctyltriethoxysilane, isooctyltrimethoxysilane, 3-aminopropyltrimethoxysilane, 3-aminopropyldimethoxymethylsilane, 2-aminoethyltrimethoxysilane , 3-amino-2-methylpropyltrimethoxysilane, 4-aminobutyltrimethoxysilane, N-ethylaminoisobutyltrimethoxysilane or 4-amino-3-methylbutyltrimethoxysilane Or two or more Be selected is effective can be improved effectively the adhesion of the swash plate surface and the slip composition.

The organosilane compound is preferably contained in an amount of 0.1 to 5% by weight based on 100% by weight of the protonic solvent and the organosilane compound. If the organosilane compound is less than 0.1% by weight, the adhesion between the base material (A) and the second coating layer (400) may not be sufficiently improved. If the organosilane compound is more than 5% by weight, There is a problem that the coating layer can not be formed. Therefore, when it is included in the above-mentioned range, it can be uniformly coated without agglomeration to effectively improve adhesion between the base material (A) and the second coating layer (400).

In addition, the inorganic metal compound of the present invention may contain 0.01 to 1.0% by weight, based on 100% by weight of the protonic solvent and the inorganic metal compound, of at least one selected from the group consisting of metal phosphates, metal nitrates and metal fluorides. .

When the amount of the inorganic metal compound is less than 0.01%, the adhesion between the plate and the sliding composition can not be sufficiently improved, and the improvement of the corrosion resistance and wear resistance may be insufficient. When the content is more than 1.0% by weight, There is a problem in that a uniform coating layer can not be formed. Therefore, when it is included in the above-mentioned range, it is advantageous that the adhesion between the base material (A) and the second coating layer (400) can be effectively improved.

Wherein the metal phosphate is one or more selected from aluminum phosphate, zinc phosphate, magnesium phosphate, manganese phosphate, iron phosphate or zinc phosphate, and the metal nitrate is selected from the group consisting of magnesium nitrate, manganese nitrate, lanthanum nitrate, and one kind or two or more kinds selected from the group consisting of cerium, wherein the metal fluoride is a lithium hexafluoro silicate (LiSiF _6), silicate (MgSiF _6), hydro-fluorene silicic acid (H ₂ SiF ₆₎ in magnesium-hexafluoro, fluorenyl zirconium conic acid (H ₂ ZrF _6), fluorenyl titanium acid (H ₂ TiF _6), fluorenyl half acid (H ₂ HfF ₆₎ to component (P) with an organic silane compound alone or in combination of two or more is selected, is selected from and The adhesion of the second coating layer 400 can be effectively improved, and corrosion resistance and durability can be remarkably improved, which is effective.

The weight ratio of the organosilane compound to the inorganic metal compound is preferably 1:20 to 20: 1, more preferably 1:10 to 10: 1, in the composition for surface coating of compressor sliding parts of the present invention to be.

The total composition of the present invention may contain 0.05 to 5% by weight of the organosilane compound, 0.005 to 1% by weight of the inorganic metal compound, more preferably 0.5 to 3% by weight of the organosilane compound And 0.05 to 0.5% by weight of the inorganic metal compound is effective.

When the content ratio of the organosilane compound or the inorganic metal compound is out of the above range, it is difficult to obtain a uniformly dispersed surface composition of the sliding component of the compressor, and thus it is difficult to uniformly coat the surface of the component. It is difficult to maintain the adhesion between the base material (A) and the base material (A), thereby causing a problem that durability and corrosion resistance are reduced. Accordingly, by including the organosilane compound or the inorganic metal compound within the above range, the adhesion between the base material (A) and the second coating layer (400) can be effectively improved and the corrosion resistance, heat resistance and fatigue hardness of the compressor sliding parts There is an effect that can be.

In the second aspect of the present invention, the composition for surface coating of the compressor sliding part of the first aspect is first coated and then coated on the surface of the compressor sliding part (P) formed with the first coating layer (300) 2 coating layer 400 is formed.

The first coating layer 300 is preferably formed to a thickness of 1 to 200 nm, more preferably 5 to 100 nm, so that the adhesion between the base material A and the second coating layer 400 can be effectively improved If the thickness of the first coating layer 300 is less than 1 nm, the adhesion between the base material A and the second coating layer 400 is reduced to reduce the corrosion resistance and durability of the sliding part P of the compressor Lt; / RTI >

The second coating layer 400 coated with the sliding composition improves lubrication characteristics and protects parts under severe operating conditions of a compressor at high speed and high load, thereby improving corrosion resistance, heat resistance, and fatigue characteristics. , A polyamide-imide resin, a polyimide resin, and an epoxy resin, a solid lubricant, and a wear-resistant material.

The solid lubricant preferably contains at least one of polytetrafluoroethylene (PTFE), graphite, molybdenum disulfide, tungsten disulfide, and boron nitride. The abrasion resistant material preferably contains at least one of alumina, titanium dioxide, and zirconia, It is effective to dissolve and disperse it in an organic solvent such as methylpyrrolidone, benzene, xylene, toluene, and the like.

Accordingly, the surface roughness Rz of the surface of the compressor sliding part P on which the first coating layer 300 of the present invention is formed is 5 to 15 占 퐉.

The surface roughness Rz is a value calculated by measuring the degree of small irregularities on the surface of the compressor sliding part P by a ten-point average calculation method. 5 from the highest mountain, and 5 from the deepest to the lowest, and find the average value of the distance from the mean of each of the five points. The difference is expressed in microns (㎛).

If the surface roughness Rz is less than 5 mu m, there is a merit that the coating thickness becomes uniform at the time of coating, but the adhesion with the second coating layer 400 may be lowered. If the surface roughness Rz is more than 15 mu m The adhesion force with the second coating layer 400 is improved but the interface friction between the metals can occur earlier than the desired time due to the wear of the coating layer during a long time operation because the maximum surface roughness and the distance from the coating surface are short.

Therefore, by coating the sliding composition on the surface of the compressor sliding part (P) coated with the composition for surface coating of the compressor sliding part of the present invention, heat generation is suppressed during abrupt friction movement in a state where no lubricating oil is supplied during the initial operation of the compressor , A low friction effect is exhibited, and the lubrication characteristic can be effectively implemented. Further, there is an advantage that the wear and the peeling of the sliding composition caused by the long-term operation can be prevented, and the durability and the corrosion resistance can be remarkably improved.

FIG. 3 is a cross-sectional view illustrating the structure of a variable displacement swash plate type compressor in an embodiment in which the compressor sliding part of the present invention is applicable. The variable displacement swash plate compressor according to the present invention includes a cylinder block 110 having a plurality of cylinder bores 113 formed therein, a front housing 120 coupled to one end of the cylinder block 110, And a rear housing 130 coupled to the other end of the block 110. The cylinder block 110 and the front and rear housings 120 and 130 are combined to constitute an outer housing of the compressor as a whole.

In the cylinder block 110, a plurality of cylinder bores 113 are formed radially through the cylinder block 110. A piston 115 is movably installed inside the cylinder bore 113. The piston 115 is formed in a substantially cylindrical shape and is installed so as to reciprocate linearly along the cylinder bore 13. The piston 115 reciprocates linearly in the cylinder bore 113 to compress the refrigerant.

The front housing 120 installed at one end of the cylinder block 110 cooperates with the cylinder block 110 to form a crank chamber 121 therein. The crank chamber 121 is a space in which the swash plate 140 and the like to be described later are installed in a space where the hermeticity is maintained.

A suction chamber 131 selectively communicating with the cylinder bore 113 is formed in the rear housing 130 installed at the other end of the cylinder block 110. The suction chamber 131 is formed at a position adjacent to the edge of the rear housing 130 facing the cylinder block 110. The suction chamber 131 serves to transfer the refrigerant to be compressed into the cylinder bore 113.

A discharge chamber 133 is formed in the rear housing 130. The discharge chamber 133 also communicates with the cylinder bore 113 selectively. The discharge chamber 133 is formed in an area corresponding to the center of a surface of the rear housing 130 facing the cylinder block 110. The discharge chamber 133 is a place where the refrigerant compressed in the cylinder bore 113 is discharged and temporarily stays.

A rotating shaft 150 is provided to penetrate the front housing 120 and the cylinder block 110. A swash plate 140 having a predetermined inclination angle with respect to the rotating shaft 150 is provided at an intermediate portion of the rotating shaft 150. The swash plate 140 is rotated to receive the power from an external driving source (not shown), and the swash plate 140 rotates in accordance with the rotation of the rotating shaft 150.

A piston (115) is coupled to an edge of the swash plate (140). A hemispherical shoe 142 is provided between the swash plate 140 and the piston 115. The swash plate 140 is rotated by the shoe 142 coupled between the swash plate 140 and the piston 115 so that the piston 115 is linearly reciprocated to compress the refrigerant.

An electronic control valve 160 is provided at one side of the rear housing 130. The electromagnetic control valve 160 is used for adjusting the angle of the swash plate 140. That is, the electronic control valve 160 adjusts the angle of the swash plate 140 by controlling the refrigerant flow from the suction chamber 131 to the cylinder bore 113 and from the cylinder bore 113 to the discharge chamber. The angle of the swash plate is adjusted so that the amount of the refrigerant compressed in the cylinder bore 113 is varied.

This illustrates the structure of a typical compressor capable of forming the first coating layer 300 and the second coating layer 400 of the present invention. However, the present invention is not limited thereto, and is applicable to all components that rub in various compressor configurations.

Therefore, in the compressor of the present invention, at least one of swash plate, slide bearing, shoe, or piston may be selected from among compressors, and in the present invention, the 'sliding bearing' And various types of bearings.

Property measurement

1. Measurement of abrasion resistance, durability and impact resistance

Abrasion resistance, durability and impact resistance were measured using a seizure tester, and ML (Marginal Lubrication) and RL (Ramp Load) tests were conducted. The ML test is to measure the time at which the operation is stopped due to loss of lubrication of the swash plate by investigating the wear and durability of the swash plate when the swash plate is changed from the normal operating state (lubricating oil supply) to the abnormal state operation to be. First, for PRE-RUNNING, the rotational speed is set at 100 rpm and raised to 1000 rpm within 1 min. The load is initially raised to 138 kgf within 2 min with an initial load of 45 kgf and held constant for the duration of the test. At this time, the OIL is sprayed from the initial start, and after 10 minutes, the OIL is stopped to measure the time taken until the sorption. The RL test is a method of examining the impact resistance and load bearing that abnormal load is applied to the swash plate due to external impact or other factors in normal operating condition (lubricating oil supply). PRE-RUNNING also starts at 100 rpm and raises to 1000 rpm within 2 minutes , The OIL is injected from the initial start, and the load is maintained at 45 kgf for 10 minutes and then the OIL is stopped. Then, the load is gradually increased from 90 kgf to 1845 kgf per minute and the torque increases suddenly or the abnormal noise The results are shown in Table 1. The results are shown in Fig.

2. Surface roughness measurement

The surface roughness was measured using a surface roughness tester (KOSAKA MODE SE4000, Kosaka, Japan) using ten point average calculation method. The results are shown in Table 1.

Example 1

As shown in the following Table 1, 100 g of the organosilane solution was prepared by dissolving 3-glycidoxypropyltrimethoxysilane (organosilane A) in 3% by weight of ethanol, and the inorganic metal compound (H ₂ ZrF ₆ ) To 0.2 wt%, to prepare 100 g of an inorganic metal aqueous solution. The two solutions are mixed and stirred at room temperature to prepare a composition for surface coating of compressor sliding parts. This was washed and dried. (SM-PTFE-3900, cut-down AMT) was coated to a thickness of 20 탆, dried and heat-treated to prepare a compressor sliding component in which a composition for surface coating and a slip composition were sequentially coated.

EXAMPLES 2-8

The procedure of Example 1 was repeated, except that the organosilane compound, the type of the inorganic metal compound and the coating thickness of the sliding composition were changed as shown in Table 1 below.

Comparative Example 1

As shown in the following Table 1, the composition was prepared in the same manner as in Example 1, except that the composition for component surface coating was not used.

[Comparative Examples 2 ~ 3]

The procedure of Example 1 was repeated, except that the organosilane compound, the type of the inorganic metal compound and the coating thickness of the sliding composition were changed as shown in Table 1 below.

[Table 1]

As shown in Table 1, Comparative Example 1 shows that the durability and impact resistance are remarkably reduced as shown in the results of the ML test and the RL test as a result of the screed test by not coating the composition for surface coating of parts. In addition, when the organosilane compound or the inorganic metal compound alone is used as shown in Comparative Examples 2 and 3, the results are similar to those of Comparative Example 1, and it can be seen that there is almost no effect.

On the other hand, as shown in Examples 1 to 8, when the organosilane and the inorganic metal compound were used in combination, the results of the screed test showed about twice the results of Comparative Examples 1 to 3, thereby remarkably improving durability and impact resistance . Therefore, when the sliding component is coated on the sliding component, the composition for surface coating of the compressor component is first coated to form the first coating layer 300, and the sliding composition is coated thereon to form the second coating layer 400 It can be seen that it is effective.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. Accordingly, the above description should not be construed as limiting the scope of the present invention defined by the limits of the following claims.

110: cylinder block 120: front housing
130: rear housing 140: swash plate
150: rotation shaft 160: pressure regulating valve
210: front housing 230: middle housing
250: Rear housing
300: first coating layer
400: Second coating layer
A: Base material
P: Sliding parts

Claims (15)

Compressor sliding part surface coating composition comprising an organosilane compound and an inorganic metal compound.
The method of claim 1,
Wherein the organosilane compound is one or more selected from the group consisting of compounds represented by the following general formula (1).
[Chemical Formula 1]

Wherein R ₁ is (C ₁ -C 10) alkyl and R ₂ , R ₃ and R ₄ are each independently selected from the group consisting of (C 1 -C 20) alkyl, (C 1 -C 20) alkoxy, glycidoxy C10) alkyl, amino (C1-C10) alkyl, (C3-C20) cycloalkyl, (C5-C20) are (C1-C20) is selected from alkyl, wherein R _2, R ₃ and R ₄ are at the same time, (C1- C20) < / RTI > alkoxy,
Alkyl, alkoxy, glycidoxyalkyl, aminoalkyl, cycloalkyl, aralkyl of R ₂ , R ₃ and R ₄ is (C 1 -C 5) alkyl, amino, cyano, (C 3 -C 10) cycloalkyl, -C20) aryl or glycidyl. ≪ / RTI >
3. The method of claim 2,
The organosilane compound may be selected from the group consisting of 3-glycidoxypropyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, ethyl Trimethylsilane, trimethoxysilane, butyltrimethoxysilane, isobutyltriethoxysilane, isobutyltrimethoxysilane, hexadecyltrimethoxysilane, hexadecyltriethoxysilane, hexyltrimethoxysilane, hexyltriethoxysilane, Aminopropyltrimethoxysilane, 3-aminopropyltrimethoxysilane, 2-aminoethyltrimethoxysilane, 3-amino-2-oxo-2-methylpropyltrimethoxysilane, One or two or more selected from the group consisting of 4-aminopropyltrimethoxysilane, 4-aminobutyltrimethoxysilane, N-ethylaminoisobutyltrimethoxysilane and 4-amino-3-methylbutyltrimethoxysilane. Part surface Tingyong composition.
The method of claim 1,
The composition for surface coating of the compressor sliding part comprises at least one protonic solvent selected from water, (C1-C7) lower alcohol or a mixture thereof.
5. The method of claim 4,
Wherein the organosilane compound is contained in an amount of 0.1 to 5 wt% based on 100 wt% of the protonic solvent and the organosilane compound.
The method of claim 1,
Wherein the inorganic metal compound is one or more of metal phosphate, metal nitrate or metal fluoride.
The method according to claim 6,
The metal phosphate may be one or more selected from aluminum phosphate, zinc phosphate, magnesium phosphate, manganese phosphate, iron phosphate or zinc phosphate,
The metal nitrate is one or more selected from magnesium nitrate, manganese nitrate, lanthanum nitrate, neodymium nitrate, cerium nitrate,
The metal fluoride is selected from the group consisting of lithium hexafluorosilicate (LiSiF ₆ ), magnesium hexafluorosilicate (MgSiF ₆ ), hydrofluoric acid (H ₂ SiF ₆ ), fluzirconic acid (H ₂ ZrF ₆ ), flutitanic acid H ₂ TiF ₆ ), and fluffhenic acid (H ₂ HfF ₆ ).
5. The method of claim 4,
Wherein the inorganic metal compound is contained in an amount of 0.01 to 1.0 wt% based on 100 wt% of the protonic solvent and the inorganic metal compound.
The method of claim 1,
Wherein the weight ratio of the organosilane compound to the inorganic metal compound is 1:20 to 20: 1.
Compressor sliding part formed by first coating the composition of any one of claims 1 to 9 on the surface of the base material (A) for manufacturing the compressor sliding part to form a first coating layer (300).
The method of claim 10,
Wherein the coating thickness of the first coating layer (300) of the compressor sliding part (P) is 1 to 200 nm.
The method of claim 10,
Wherein a second coating layer (400) is formed on the surface of the compressor sliding part (P) by secondary coating with a sliding composition.
13. The method of claim 12,
Wherein the sliding composition comprises one or more resins selected from silicone polyester resin, polyamideimide resin, polyimide resin and epoxy resin, a solid lubricant and a wear resistant material,
Wherein the solid lubricant comprises at least one of polytetrafluoroethylene (PTFE), graphite, molybdenum disulfide, tungsten disulfide, and boron nitride,
Wherein the wear resistant material comprises at least one of alumina, titanium dioxide and zirconia.
The method of claim 10,
Wherein the surface roughness of the compressor sliding part (P) has an Rz value of 5 to 15 占 퐉.
13. The method of claim 12,
The compressor sliding part (P) is at least one of a swash plate, a sliding bearing, a shoe, and a piston.

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