What are the performance and evaluation methods of hydraulic oil in Lanzhou (1)？- Lanzhou Liulian Kunrun Petrochemical Co., LTD-皇冠真人线上下载手机版

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What are the performance and evaluation methods of hydraulic oil in Lanzhou (1)？

Category: Company News Release time: 2021-04-10 Author: Lanzhou Liulian Kunrun Petrochemical Co., LTD

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The performance of hydraulic oil and the methods of evaluating it are as followsLanzhou hydraulic oil manufacturersLet me give you a detailed introduction:

1.Excellent liquid condition

The fluidity of hydraulic oil immediately harms the actual effect of transporting kinetic energy, which is related to the viscosity, pour point and viscous temperature of hydraulic oil。The pour point and ultra-low temperature viscosity of the hydraulic oil should be able to integrate into the estimated minimum actual operating temperature of the gasoline pump。The hydraulic oil of a hydraulic transmission system with a wide range of temperature transition should have excellent viscosive-temperature properties。Otherwise, when the temperature decreases, the viscosity increases greatly, the friction damage increases, and the underwater concrete speed is affected;When the temperature rises, the viscosity becomes smaller and smaller, endangering the application performance。The viscosive-temperature properties of hydraulic oil can be improved by adding viscosity coefficient modifier to hydraulic oil。

2.Excellent incompressibility and resistance to foam plastics

Lanzhou hydraulic oil

        The volume of liquid is not easy to change under external force, but after the liquid penetrates into the air, its expansion will be harmed。To maintain the incompressibility of hydraulic oil, it is particularly important to reliably transfer kinetic energy for hydraulic oil as a working substance and ensure the dexterous posture of control tissue。The hydraulic oil used at this stage is mostly crude oil, and the air can melt into the oil, and the key to its solubility lies in the working pressure and temperature of the air。When the air in the hydraulic oil to maintain the melting condition,There are no problems with the hydraulic transmission system,But when the hydraulic oil is based on the hydraulic cylinder, gate valve or other hydraulic system,Work stress can sometimes suddenly decrease,Plus the hazard of temperature transition,The air is easily released from the hydraulic oil and a lot of bubbles are produced,This will endanger the incompressibility of the hydraulic oil。In addition, the components of the hydraulic transmission system are in operation, and the hydraulic oil and air are easily created under the stirring of the mechanical equipment. If the foam can not be quickly faded, it will also reduce the performance of the hydraulic oil in the work。Therefore, in order to make the hydraulic oil has excellent incompressibility and anti-foam property。On the one hand, effective measures should be taken to avoid air infiltration into the hydraulic transmission system;On the other hand, anti-foam agent should be added to the hydraulic oil to improve the anti-foam performance of the hydraulic oil。The incompressibility of the hydraulic oil is evaluated by the value released from the air。The air release value of the hydraulic oil is required to be: at 50 '-C, the time required when the air in the finished oil is reduced to the required total number (min).。
        The air release value was measured by SH/T0308-92 "Determination Method of Air Release Value of Lubricating Oil"。Lanzhou hydraulic oil的抗Foaming property is also called foaming property, which refers to the trend of conversion of refined oil into foam and the smooth performance of conversion into foam。It is generally used to indicate the foam trend/foam reliability (mL/mL) under a given standard。The foaming property of hydraulic oil was measured by GB/ T12579-90 "Method for determination of foam Characteristics of lubricating oil"。
        3.Excellent shear stability
        In order to improve the viscosity temperature of hydraulic oil, viscosity coefficient modifier is often added。Viscosity coefficient change - good agent is a high polymer material, it in the shearing stress effect, if the molecular structure chain is broken, will make the viscous temperature of hydraulic oil decrease。Therefore, the hydraulic oil with viscosity coefficient modification agent should also have excellent shear stability。
        It is indicated by measuring the percentage reduction of its viscosity under a certain temperature standard based on the required shear experiment。The common hydraulic oil shear stability test methods are: ultrasonic shear test, select SH/ T0505-92 "determination method of shear stability containing polymer oil (ultrasonic shear method, diesel nozzle shear test; Vickers pump shear test;FZG transmission gear machine shear test。

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What are the performance and evaluation methods of hydraulic oil in Lanzhou (1)？