A kind of synthetic hydraulic fluid and preparation method thereof
(1) technical field
The present invention relates to artificial oil field, particularly to a kind of synthetic hydraulic fluid and preparation method thereof.
(2) background technology
Hydraulic oil is the working media of hydraulic system, modern hydraulic systems have component size little, lightweight,
The features such as compact conformation, hydraulic operation is affected by hydraulic oil character, but existing hydraulic oil thermal oxide is stabilized
Property, strainability, compatibility and wear resistence etc. are the most poor, can not meet the demand of modern hydraulic systems.
(3) summary of the invention
The present invention is in order to make up the deficiencies in the prior art, it is provided that a kind of component is reasonable, thermal oxidation stability good,
Synthetic hydraulic fluid that strainability is good, compatibility good, wear resistence is good and preparation method thereof.
The present invention is achieved through the following technical solutions:
A kind of synthetic hydraulic fluid, the component including following percentage by weight makes: compound additive bag 1.45~
6.0%, oil soluble polyalkylene glycol 60~90%, surplus is synthetic ester base oil.
Described compound additive bag includes antioxidant 0.8~3.0%, antirust agent 0.05~0.5% and extreme-pressure anti-wear
Agent 0.5~1.5%.
Described antioxidant is ashless aromatic amine antioxidant or Hinered phenols antioxidant, and oxidation resistance is strong, energy
Suppression oil ageing, reduces precipitation, paint film and the generation of greasy filth, thus suppresses the increasing of lubricating oil viscosity
Long;Described antirust agent is sulfonate (slaine is sodium, calcium, magnesium, zinc, barium etc.), organic amine or jeterocyclic chemistry
Compound, it forms physics in metal surface due to dipole and the metal surface generation electrostatic attraction of polar molecule
Absorption, or the chemisorbed that the molecule of absorption chemically reacts with metal, can be formed in metal surface closely
Molecular shield, prevents corrosion;Described extreme pressure anti-wear additives is organic sulfur compound extreme pressure anti-wear additives or organic phosphatization
Thing extreme pressure anti-wear additives, under conditions of the ability to bear load of metal surface, plays the metal surface of anti-sliding stop
Abrasion, the effect that even sinters of scratch.
Described compound additive bag also includes anti emulsifier 0.1~1.0%.
Described anti emulsifier is cithrol or ethylene oxide-propylene oxide block copolymer, absorption
At oil-water interface, change oil-water boundary tension force, or absorption destroy hydrophilic-lipophilic balance (HLB) on emulsifying agent,
Make emulsion oil-water separation during phase inversion.
Traditional polyethers base oil, is to be with oxirane, expoxy propane, epoxy butane and oxolane etc.
Raw material, under catalyst action, the linear polymer that open loop homopolymerization or copolymerization prepare.Oil of the present invention
Dissolubility ployalkylene glycol is not traditional oxirane (EO) and expoxy propane (PO) homopolymerization copolymerized polymer,
But the oil-soluble polymers prepared by block polymerization, random copolymerization, reverse block, have the advantage that
Viscosity grade is extensive, and Viscosity Index is high, and high temperature performance is excellent, and film strength is high, has outstanding deposition
Control and equipment cleaning, do not hydrolyze, use safety, and have at the aspect such as elastomer compatibility, hygroscopicity
Outstanding behaviours, particularly by alkoxylate chemical technology, improves conventional polyether base oil and other base oils
A difficult problem for intermiscibility difference.Dissolubility ployalkylene glycol also has high biological degradation rate, is the environment-friendly type of a kind of high-quality
Base oil.
Described synthetic ester base oil is polyol ester base oil, use compounding with oil soluble polyalkylene glycol.
The preparation method of this synthetic hydraulic fluid, is characterized in that: comprise the steps:
(1) oil soluble polyalkylene glycol and synthetic ester base oil are mixed, heated and stirred, constant temperature 50~60 DEG C
Lower mix homogeneously obtains miscella A;
(2) in the miscella A that step (1) prepares, compound additive bag, constant temperature 50~60 DEG C of bars are added
Continue stirring 1~2h under part, prepare miscella B;
(3) the miscella B that step (2) prepares is filtered, i.e. under 0.1MPa~0.2MPa pressure
Obtain limpid transparent synthetic hydraulic fluid.
Synthetic hydraulic fluid of the present invention and preparation method thereof provides the benefit that: component is reasonable, has suitable sticking
Degree and viscosity-temperature characteristic, can active balance mechanical efficiency and volumetric efficiency, thermal oxidation stability is good, can effectively press down
The acidic materials produced by oxidation during only using and greasy filth;Strainability is good, can meet precision high,
Gap is little, control the rigors of the complicated hydraulic system of element, moreover it is possible to meet hydraulic means in operating temperature
Time with during start-up temperature for the requirement of liquid viscosity, viscosity-temperature characteristic meets the various need that different purposes are proposed
Want;And hydraulic system metal and encapsulant are had good compatibility, demulsification resistance, air release property,
Wear resistences etc. are functional;Owing to using the oil soluble polyalkylene glycol base oil of high biological degradation rate, make this
Invention synthetic hydraulic fluid also has good environmental friendliness characteristic.
(4) detailed description of the invention
Below in conjunction with embodiment, the invention will be further described, but the invention is not limited in this, embodiment
In preparation method be customary preparation methods, no longer describe in detail.
Embodiment 1:(is in terms of double centner, as follows)
This compound additive bag, wherein sulfur-bearing 6.74%, phosphorus 3.38%, zinc 3.88%.
The preparation method of this synthetic hydraulic fluid, employing following steps:
(1) oil soluble polyalkylene glycol and the polyol ester base oil gear pump of above-mentioned weight are pumped into mediation
In, heated and stirred, at constant temperature 60 DEG C, mix homogeneously obtains miscella A;
(2) in the miscella A that step (1) prepares, add the compound additive bag of above-mentioned weight, constant temperature
Continue mechanical agitation 2h under the conditions of 60 DEG C, prepare miscella B;
(3) the miscella B that step (2) prepares is filtered, under 0.2MPa pressure, through having
The filter of Filter bag device filters, and obtains limpid transparent synthetic hydraulic fluid.
Embodiment 2:
This compound additive bag, wherein sulfur-bearing 6.5%, phosphorus 0.7%, nitrogen 3.2%.
The preparation method of this synthetic hydraulic fluid, employing following steps:
(1) oil soluble polyalkylene glycol and the synthetic ester base oil gear pump of above-mentioned weight are pumped into mediation
In, heated and stirred, at constant temperature 55 DEG C, mix homogeneously obtains miscella A;
(2) in the miscella A that step (1) prepares, add the compound additive bag of above-mentioned weight, constant temperature
Continue mechanical agitation 1.5h under the conditions of 55 DEG C, prepare miscella B;
(3) the miscella B that step (2) prepares is filtered, under 0.15MPa pressure, Jing Guoyou
The filter of filter bag device filters, and obtains limpid transparent synthetic hydraulic fluid.
Embodiment 3:
This compound additive bag, wherein sulfur-bearing 7.5%, phosphorus 3.7%, zinc 7.8%.
The preparation method of this synthetic hydraulic fluid, employing following steps:
(1) oil soluble polyalkylene glycol and the synthetic ester base oil gear pump of above-mentioned weight are pumped into mediation
In, heated and stirred, at constant temperature 50 DEG C, mix homogeneously obtains miscella A;
(2) in the miscella A that step (1) prepares, add the compound additive bag of above-mentioned weight, constant temperature
Continue mechanical agitation 1h under the conditions of 50 DEG C, prepare miscella B;
(3) the miscella B that step (2) prepares is filtered, under 0.1MPa pressure, through having
The filter of Filter bag device filters, and obtains limpid transparent synthetic hydraulic fluid.
Embodiment 4:
This compound additive bag, wherein sulfur-bearing 6.5%, phosphorus 3.0%, zinc 2.7%.
The preparation method of this synthetic hydraulic fluid, employing following steps:
(1) oil soluble polyalkylene glycol and the synthetic ester base oil gear pump of above-mentioned weight are pumped into mediation
In, heated and stirred, at constant temperature 55 DEG C, mix homogeneously obtains miscella A;
(2) in the miscella A that step (1) prepares, add the compound additive bag of above-mentioned weight, constant temperature
Continue mechanical agitation 2h under the conditions of 55 DEG C, prepare miscella B;
(3) the miscella B that step (2) prepares is filtered, under 0.15MPa pressure, Jing Guoyou
The filter of filter bag device filters, and obtains limpid transparent synthetic hydraulic fluid.
Embodiment 5:
This compound additive bag, wherein sulfur-bearing 9.2%, phosphorus 2.4%, zinc 5.2%.
The preparation method of this synthetic hydraulic fluid, employing following steps:
(1) oil soluble polyalkylene glycol and the synthetic ester base oil gear pump of above-mentioned weight are pumped into mediation
In, heated and stirred, at constant temperature 60 DEG C, mix homogeneously obtains miscella A;
(2) in the miscella A that step (1) prepares, add the compound additive bag of above-mentioned weight, constant temperature
Continue mechanical agitation 1.5h under the conditions of 60 DEG C, prepare miscella B;
(3) the miscella B that step (2) prepares is filtered, under 0.2MPa pressure, through having
The filter of Filter bag device filters, and obtains limpid transparent synthetic hydraulic fluid.
With conventional hydraulic oil phase ratio, synthetic hydraulic fluid of the present invention has the advantage that
A) pour point (experimental technique ASTM D97), the pour point of synthetic hydraulic fluid of the present invention is lower than conventional hydraulic oil
15~30 DEG C, more adapt to extreme low temperature applied environment;
B) Viscosity Index (experimental technique ASTM D2270), synthetic hydraulic fluid of the present invention improves 15~30, sticks
Warm nature can more preferably, and high-temperature viscosity rate of descent reduces by 15~30%, and high temperature oil-film retention property is more preferable;
C) abrasion-resistance, uses micro-pull strength analyzer to test, and synthetic hydraulic fluid abrasion-resistance of the present invention compares V
Class base oil improves 20%, improves 65~85% than IV class base oil, is more far superior to mineral oil;
D) depositional control and cleansing performance (experimental technique ASTM D2893B), synthetic hydraulic fluid of the present invention is few
Producing deposition, acid number change and viscosity change are little, have obvious cleansing performance;
E) hydrolysis stability (experimental technique ASTM D2619), synthetic hydraulic fluid of the present invention is retaining other IV
While class and V class synthetic hydraulic fluid performance, improve hydrolysis stability, especially with synthesizing ester hydraulic oil
Comparing, hydrolysis stability improves 30~70%;
F) air release property (experimental technique ASTM D3427), the air release value of synthetic hydraulic fluid of the present invention
Ratio conventional hydraulic oil low 70~80%, can be substantially reduced the oil product cavitation corrosion to gear apparatus, slow down oil product old
Change, extend the service life of oil product;
G) abrasion-resistance (experimental technique ASTM D6973), synthetic hydraulic fluid of the present invention rubs than conventional hydraulic oil
Loss rate reduces about 86%, has significant abrasion-resistance;
H) bearing capacity (experimental technique DIN51354), the inefficacy rank of synthetic hydraulic fluid of the present invention is than tradition
Hydraulic oil improves 2~5 grades, and bearing capacity is higher, can provide equipment preferably under high temperature high sliding speed
Oil film is protected;
I) biological degradability of synthetic hydraulic fluid of the present invention is up to more than 70%, belongs to environmentally friendly product;
J) oxidation stability (experimental technique ASTM D2272), synthetic hydraulic fluid of the present invention is than synthesis hydrocarbon, conjunction
The synthetic hydraulic fluid becoming ester improves 70~80%, effectively extends service life;
K) overlength uses the cycle, and the drain period of synthetic hydraulic fluid of the present invention is 1~5 times of conventional hydraulic oil.