阅读说明：本技术 一种新能源车载滑片式空气压缩机用压缩机油及其制备方法 (Compressor oil for new energy vehicle-mounted sliding vane type air compressor and preparation method thereof ) 是由 战红豆 王述申 于 2020-06-16 设计创作，主要内容包括：本申请提出了一种新能源车载滑片式空气压缩机用压缩机油及其制备方法,其中压缩机油包括天然气合成油、烷基萘基础油和其他添加剂。本发明所述一种新能源车载滑片式空气压缩机用压缩机油具有以下有效效益：选用天然气合成油和烷基萘基础油为基础油组合,以此为新能源车载滑片机用长寿命压缩机油,组分合理,添加剂感受性好,性能稳定,具有出色的水解安定性和高温抗氧化能力,有效抑制油泥、漆膜、胶质等有害沉积物产生,保持设备清洁性,极压抗磨能力好,防锈防腐蚀能力强,超强耐水特性,使用损耗低,换油周期长,经济性好,满足了新能源车载滑片机超长使用寿命和耐水特性的要求。(The application provides compressor oil for a new energy vehicle-mounted sliding vane type air compressor and a preparation method thereof, wherein the compressor oil comprises natural gas synthetic oil, alkyl naphthalene base oil and other additives. The compressor oil for the new energy vehicle-mounted sliding vane type air compressor has the following effective benefits: the long-life compressor oil for the new-energy vehicle-mounted sliding vane machine is prepared by combining natural gas synthetic oil and alkyl naphthalene base oil serving as base oil, is reasonable in component, good in additive sensitivity, stable in performance, excellent in hydrolytic stability and high-temperature oxidation resistance, effectively inhibits harmful sediments such as oil sludge, paint films and colloid, keeps equipment cleanliness, is good in extreme pressure abrasion resistance, strong in rust prevention and corrosion prevention capability, super-strong in water resistance, low in service loss, long in oil change period and good in economy, and meets the requirements of the super-long service life and the water resistance of the new-energy vehicle-mounted sliding vane machine.)

1. The compressor oil for the new-energy vehicle-mounted sliding-vane air compressor is characterized by comprising the following raw materials in parts by weight:

20-82 parts of natural gas synthetic oil, 10-65 parts of alkyl naphthalene base oil, 1-5 parts of a hydrophobing agent, 2-6 parts of a high-temperature antioxidant, 1-5 parts of an extreme pressure antiwear agent, 0.05-0.3 part of a corrosion inhibitor, 0.03-1 part of an antirust agent, 0.1-0.5 part of a free water catcher, 0.03-0.1 part of a demulsifier and 0.01-0.05 part of a defoaming agent.

2. A compressor oil according to claim 1, characterized in that: the hydrophobic agent is polyisobutylene with large molecular weight, the polyisobutylene is PB2400, and the molecular weight of PB2400 is 2450.

3. A compressor oil according to claim 1, characterized in that: the high-temperature antioxidant comprises one or more of macromolecular phenol, alkylated diphenylamine and naphthylamine, the molecular weight of the macromolecular phenol is 900-1100, and the alkyl C atom number of the alkylated diphenylamine is C₄-C₈The naphthylamine is N-phenyl- α -naphthylamine or N-phenyl- β -naphthylamine.

4. A compressor oil according to claim 1, characterized in that: the extreme pressure antiwear agent is a phosphate ester type agent, and the phosphate ester type agent comprises one or more of phenyl phosphite ester and phenyl thiophosphate ester.

5. A compressor oil according to claim 1, characterized in that: the corrosion inhibitor is benzotriazole and derivatives thereof.

6. A compressor oil according to claim 1, characterized in that: the antirust agent is organic amine or a nitrogen-containing heterocyclic compound.

7. A compressor oil according to claim 1, characterized in that: the free water catcher is a nonionic free water catcher with HLB value less than 10, and the nonionic free water catcher is polyoxyethylene ether free water catcher with molecular weight more than 500.

8. A compressor oil according to claim 1, characterized in that: the demulsifier is an oil-soluble nonionic free water catcher, and the oil-soluble nonionic free water catcher is a polymer of ethylene oxide and propylene oxide with the molecular weight of 1500-10000.

9. A compressor oil according to claim 1, characterized in that: the defoaming agent is a silicone defoaming agent, and the silicone defoaming agent is a macromolecular siloxane defoaming agent.

10. A method for preparing the compressor oil according to claim 1, comprising:

s1: adding 45-55 wt% of natural gas synthetic oil and 45-55 wt% of alkyl naphthalene base oil into a blending kettle for stirring, wherein the stirring temperature is 48-52 ℃, and the stirring speed is 90-110 r/min;

s2: sequentially adding a hydrophobic agent, a high-temperature antioxidant, an extreme pressure antiwear agent, a corrosion inhibitor, an antirust agent, a free water capture agent and the remaining natural gas synthetic oil and alkyl naphthalene base oil, and continuously stirring for 1-2 hours;

s3: and sequentially adding a demulsifier and a defoaming agent, stopping heating, continuously stirring and cooling to room temperature to obtain the new-energy compressor oil for the vehicle-mounted sliding vane air compressor.

Technical Field

The invention relates to the field of compressor lubrication and cooling, in particular to compressor oil for a new energy vehicle-mounted sliding vane type air compressor and a preparation method thereof.

Background

With the advancement of science and technology and the guidance of national policies, new energy vehicles are rapidly and rapidly developing in recent years. At present, most new energy automobiles are provided with pneumatic braking systems and pneumatic door control systems. The air compressor of the electric vehicle provides an air source for a whole vehicle air braking system and other auxiliary air systems, and is one of essential key parts of a new energy vehicle. In the field of vehicle air compressors, sliding vane compressors take all-round advantages by virtue of their ultra-long life, good reliability, excellent exhaust quality, higher efficiency and less maintenance.

The sliding vane type air compressor is a rotary air compressor adopting contact sealing, and is mainly formed from main components of motor, machine shell, rotor, stator and sliding vane, etc. the external surface of rotor and internal surface of cylinder are made into the form of circular form, the rotor is eccentrically mounted in the cylinder, on the rotor several sliding vane grooves are cut, in every groove a sliding vane capable of freely sliding is mounted, when the rotor is rotated, the sliding vane can be thrown out from the groove under the action of centrifugal force, its end portion is tightly attached to internal surface of cylinder, and when the rotor is rotated, the volume of compression chamber can be changed along with the sliding amount of sliding vane so as to attain the goal of compressing gas.

The sliding vane compressor oil plays an extremely important role in the working process of the sliding vane machine, lubricates the working system of the whole sliding vane machine, prevents abrasion between the sliding vane and the groove, reduces resistance and energy loss in the working process of the sliding vane, seals the cavity of the sliding vane machine, prevents gas backflow, and reduces the working temperature of a wall body by circulating flow, cooling and lowering the temperature.

Based on the structural characteristics of the sliding vane type air compressor for loading and the problem feedback of the whole vehicle factory, the most common use problem of the existing new energy vehicle-mounted sliding vane machine is the emulsification problem of compressor oil. The compressor oil that takes place the emulsification can't realize effects such as normal lubrication, cooling, antifriction, leads to lubricated badly between gleitbretter machine gleitbretter and the rotor, wearing and tearing aggravation, and faults such as gleitbretter machine compression pressure decline, displacement are not enough can lead to the gleitbretter to normally throw away even when serious, and the work of gleitbretter machine is effectual.

The common fixed air compressor and the common movable air compressor are both provided with automatic drainage or manual drainage devices so as to timely drain condensed water in the system and prevent the emulsification failure of compressor oil caused by the long-time mixing of water and the compressor oil. Because the sliding vane compressor that joins in marriage the dress on the new forms of energy vehicle is mostly compact integrated form structure, does not have the drainage device of comdenstion water. The slide vane machine is at the working process, and the high temperature high density compressed air who carries moisture contacts with cooling cycle's lubrication, and when the temperature is less than dew point temperature water, moisture in the high temperature high density compressed air will condense and become liquid water, enters into lubricating oil, and the comdenstion water that produces in the air compression process can't discharge at any time, and can deteriorate because of the emulsification of oil for a long time. Therefore, the problem of hydrolysis and emulsification of the new energy vehicle-mounted sliding vane type air compressor oil is a problem which is difficult to solve and troubles vehicle manufacturers and sliding vane machine accessories.

At present, manufacturers mostly adopt a mode of shortening an oil change period to relieve the emulsification problem of sliding vane machine oil. This approach not only increases the cost of maintenance, but also risks oil failure once the tracking is not timely.

Disclosure of Invention

In order to solve the problems, the application provides compressor oil for a new energy vehicle-mounted sliding vane type air compressor and a preparation method thereof, and on one hand, the compressor oil for the new energy vehicle-mounted sliding vane type air compressor comprises the following raw materials in parts by weight:

20-82 parts of natural gas synthetic oil, 10-65 parts of alkyl naphthalene base oil, 1-5 parts of a hydrophobing agent, 2-6 parts of a high-temperature antioxidant, 1-5 parts of an extreme pressure antiwear agent, 0.05-0.3 part of a corrosion inhibitor, 0.03-1 part of an antirust agent, 0.1-0.5 part of a free water catcher, 0.03-0.1 part of a demulsifier and 0.01-0.05 part of a defoaming agent.

The natural Gas synthetic oil, Gas to Liquid, is a base oil synthesized by using natural Gas as a raw material, and the process basis of the synthesis process is Fischer-Tropsch synthesis. The fischer-tropsch synthesis is a process developed in 1925 by the german chemists franz fisher and hans tolopro to synthesize liquid saturated hydrocarbons and hydrocarbons with synthesis gas (carbon monoxide and hydrogen) as raw material under the conditions of catalyst and proper reaction price adjustment, and the reaction process can be summarized as follows:

(2n+1)H₂+nCO→C_nH_(2n+2)+nH₂O

the natural gas synthetic oil is prepared by oxidizing natural gas molecules into carbon monoxide and hydrogen, and synthesizing liquid saturated long-chain alkane by a Fischer-Tropsch synthesis method. Natural gas is a gaseous low molecular hydrocarbon and non-hydrocarbon gas, the major component being methane, and also containing small amounts of ethane, propane, nitrogen and butane constituents. Compared with petroleum, natural gas has the advantages of pure composition, almost no sulfur, phosphorus and compounds thereof, more reserves, wide resources and the like, the main product of Fischer-Tropsch synthesis is hydrocarbon, the byproducts are carbon oxides and water, the reaction is relatively thorough, and the purification is easy. The natural gas synthetic oil synthesized by the process has the advantages of no sulfur, phosphorus and aromatic hydrocarbon, high saturation degree, high viscosity index, good viscosity-temperature characteristic, excellent oxidation stability and low-temperature performance, low volatility, good emulsification resistance and anti-foaming performance and the like.

The alkyl naphthalene base oil has excellent antioxidant performance, hydrolysis stability, additive solubility and dispersing performance. Research shows that naphthalene rings rich in electrons in alkyl naphthalene base oil can absorb oxygen, thereby interrupting the transmission of an oxidation chain, preventing the continuous oxidation of hydrocarbon and preventing the occurrence of oxidation. A comparison of the antioxidant properties of the different base oils is given in Table 1. As can be seen from the data in the table, the alkyl naphthalene base oil has an extremely outstanding antioxidant performance compared with other base oils. The naphthalene ring structure rich in electrons has strong polarity, good solubility and dispersibility for polar additives, and table 2 shows that the aniline points of different types of base oil are high, the polarity is weak, and the aniline point is low and the polarity is strong. Meanwhile, as shown in table 3, unlike the ester base oil, the molecular structure of the alkyl naphthalene has no easily hydrolyzable group, and the hydrolytic stability is good.

TABLE 1 comparison of antioxidant Properties of different types of base oils

Item	Low viscosity alkylnaphthalenes	High viscosity alkylnaphthalenes	PAOs	Adipic acid ester	Polyol esters
						Kinematic viscosity at 100 ℃ in mm2/s	4.7	12.4	5.8	5.3	4.3
Rotating oxygen bomb test (150 ℃,621kPa, water, copper)/min	195	180	17	70	-
						Differential scanning thermal analysis (180 ℃,3.45MPa)/min	60+	60+	2.5	5.0	60+
Total acid value (in terms of potassium hydroxide)/(mg g) after oxidative corrosion test-1)	0.092	0.089	-	7.1	1.3

TABLE 2 comparison of aniline points for different base oils

Item	Low viscosity alkylnaphthalenes	High viscosity alkylnaphthalenes	PAOs	Synthesis of esters	Alkyl benzene	Group I base oils
							Kinematic viscosity at 100 ℃ in mm2/s	4.7	12.4	5.5	5.2	4.2	4.0
Aniline point, deg.C	32	90	119	20	77.8	100

TABLE 3 comparison of hydrolytic stability of different base oils

Item	Low viscosity alkylnaphthalenes	High viscosity alkylnaphthalenes	Adipic acid ester	Polyol esters
					Kinematic viscosity at 100 ℃ in mm2/s	4.7	12.4	5.3	4.3
The total acid value after hydrolysis is increased by mg/g (calculated by potassium hydroxide)	0.02	0.02	0.16	0.20

The naphthalene ring structure rich in electrons of the alkyl naphthalene base oil and the saturated alkane structure of the natural gas synthetic oil form association, and the naphthalene ring structure and the saturated alkane structure are cooperated with each other to form the following structure, so that the oxidation resistance characteristic of high saturation of the natural gas synthetic oil can be exerted, and the strong polarity and the water resistance of alkyl naphthalene can be achieved.

Wherein n is 10 to 25.

The natural gas synthetic oil and the alkyl naphthalene base oil are used as the base oil combination, so that the anti-oxidation and anti-hydrolysis performance is excellent, and the super-strong water resistance and the super-long service life can be provided for a new energy vehicle-mounted slide vane machine; the cleaning performance and the anti-wear and anti-rust performance are excellent, and the sliding sheet and the rotor can be protected comprehensively; excellent additive sensitivity and improved system stability.

Preferably, the hydrophobic agent is a high molecular weight polyisobutylene, the polyisobutylene is PB2400, and the PB2400 has a molecular weight of 2450. The PB2400 has excellent hydrophobic property, and remarkably improves the anti-demulsification capability and hydrolysis resistance of oil products.

Preferably, the high-temperature antioxidant comprises one or more of macromolecular phenol, alkylated diphenylamine and naphthylamine, wherein the molecular weight of the macromolecular phenol is 900-1100, and the alkyl C atom number of the alkylated diphenylamine is C₄-C₈The naphthylamine is N-phenyl- α (β) -naphthylamine, and has the functions of improving the oxidation resistance of oil products, reducing harmful deposits of oil sludge, paint films and the like, inhibiting viscosity increase and prolonging service life.

Preferably, the extreme pressure antiwear agent is a phosphate type agent, and the phosphate type agent comprises one or more of phenyl phosphite and phenyl thiophosphate. The lubricating oil has the effects of reducing equipment abrasion, improving the extreme pressure resistance and the wear resistance of oil products under low oil film coverage and reducing equipment friction damage.

Preferably, the corrosion inhibitor is benzotriazole and derivatives thereof. It is used to protect nonferrous metals, including copper, aluminum and their alloys, in equipment and to reduce chemical or electrochemical metal corrosion.

Preferably, the antirust agent is organic amine or a nitrogen-containing heterocyclic compound. The function of the protective film is to form a compact protective film on the surface of metal to prevent the equipment from rusting.

Preferably, the free water scavenger is a nonionic free water scavenger having an HLB value of less than 10, and the nonionic free water scavenger is a polyoxyethylene ether free water scavenger having a molecular weight of more than 500.

Preferably, the demulsifier is an oil-soluble nonionic free water catcher, and the oil-soluble nonionic free water catcher is a polymer of ethylene oxide and propylene oxide with the molecular weight of 1500-10000.

Preferably, the defoaming agent is a silicone defoaming agent, and the silicone defoaming agent is a macromolecular siloxane defoaming agent.

On the other hand, the application also discloses a preparation method of the compressor oil, which comprises the following steps:

s1: adding 45-55 wt% of natural gas synthetic oil and 45-55 wt% of alkyl naphthalene base oil into a blending kettle for stirring, wherein the stirring temperature is 48-52 ℃, and the stirring speed is 90-110 r/min;

s2: sequentially adding a hydrophobic agent, a high-temperature antioxidant, an extreme pressure antiwear agent, a corrosion inhibitor, an antirust agent, a free water capture agent and the remaining natural gas synthetic oil and alkyl naphthalene base oil, and continuously stirring for 1-2 hours;

s3: and sequentially adding a demulsifier and a defoaming agent, stopping heating, continuously stirring and cooling to room temperature to obtain the new-energy compressor oil for the vehicle-mounted sliding vane air compressor.

This application can bring following beneficial effect:

the compressor oil for the new energy vehicle-mounted sliding vane type air compressor has the following effective benefits: the long-life compressor oil for the new-energy vehicle-mounted sliding vane machine is prepared by combining natural gas synthetic oil and alkyl naphthalene base oil serving as base oil, is reasonable in component, good in additive sensitivity, stable in performance, excellent in hydrolytic stability and high-temperature oxidation resistance, effectively inhibits harmful sediments such as oil sludge, paint films and colloid, keeps equipment cleanliness, is good in extreme pressure abrasion resistance, strong in rust prevention and corrosion prevention capability, super-strong in water resistance, low in service loss, long in oil change period and good in economy, and meets the requirements of the super-long service life and the water resistance of the new-energy vehicle-mounted sliding vane machine.

Detailed Description