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Posted August 18, 2010 By admin and has no comments yet.

Vanes Mini

Hydraulic machinery lubricant of development and trend – hydraulic oil, requirements, status quo – filtration and separation industry

With the continuous development of hydraulic technology and its obvious advantages, at present its application more widely, including air, car, ship building, oil and various construction machinery and so on. As an important part of the hydraulic system of hydraulic oil in the hydraulic transmission plays an important role, and ultimately affect productivity. Therefore, the correct choice for the hydraulic oil on all kinds of hydraulic machinery is a basic requirement.

1. Hydraulic mechanical requirements of the hydraulic oil

If the hydraulic system pump is the heart of the case, then the hydraulic oil is the blood of the entire hydraulic system. Even one of advanced design, manufacture high precision hydraulic equipment, if not properly select and use hydraulic oil, it can not give full play to the efficiency of the equipment, may even lead to serious accidents, equipment damage or shorten the device to use life. Can reliable hydraulic system, effective and economic work, to a certain extent, depend on the performance of hydraulic oil. Therefore, the hydraulic oil has the following requirements:

1. Have the right viscosity, viscosity-temperature performance and better

Hydraulic oil viscosity is a very important performance index, select the hydraulic oil, which is one of the factors to be considered first. Choice of viscosity depends on the type of pump, work pressure, use of environmental and environmental temperature, in addition to depending on the requirements of other hydraulic components. Viscosity will be too high or too low are detrimental to the efficiency of the machine reduces the total control performance degradation, the work is not flexible enough.

2. Have a good anti-rust metal, corrosion performance of hydraulic components are made from a variety of metal materials.

As water and oxygen (fuel and air contained in the oxygen contained) the role of hydraulic components corrosion occurs. Hydraulic oils and additives which oxidation, hydrolysis and other chemical reaction, will produce corrosive materials. Therefore, the port hydraulic machinery hydraulic performance requirements of high anti-rust oil.

3. Have a good antioxidant Hydraulic mechanical work, the hydraulic oil will inevitably be in contact with air oxidized. Especially when the temperature and pressure increases, the oxidation rate on the quicker. Acid produced by oxidation of the metal corrosion will be enhanced, while thick sludge deposits clog Filter And other components of the pore, prevent control of institutions, reduce efficiency, increase the wear and tear. Therefore, the better the oxidation resistance of hydraulic oil, hydraulic oil and the longer the life.

4. To have good emulsifying properties of anti-

Long hydraulic equipment to work in a damp environment will be drops of water mixed with hydraulic oil tank, the water into the tank by pump, motor oil and other hydraulic components of the violent agitation, the easy spread of hydraulic oil to form emulsion, speed up the deterioration of hydraulic oil to generate sediment, impeding heat transfer cooler, plug filters, pipes, valves and other hydraulic components of the pores, and reduces hydraulic oil lubrication. Thus, hydraulic oil hydraulic equipment requirements have good anti-emulsification properties, the hydraulic oil and water can quickly leave to make the water sink to the bottom of the tank, and then periodically discharged, to avoid the formation of a stable emulsion.

2. Development of hydraulic oil China started to develop from the 60′s hydraulic oil, so far, varieties of hydraulic oil in China is more complete, but with foreign oil companies still lags far behind, mainly in the domestic oil producers have little clean hydraulic oil and hydraulic oil to market green. The development of hydraulic oil in general can be divided into ordinary hydraulic oil, antiwear hydraulic oil, low temperature hydraulic oil, fire resistant hydraulic fluid, hydraulic oil clean, green hydraulic oil in several stages.

1. Ordinary hydraulic oil Ordinary hydraulic oil is refined lubricating oil fraction as the depth of base oil has antioxidant added preservatives, rust inhibitors, rust inhibitors and anti-foam agents, in addition to add a small amount of anti-wear agent, in some cases increase there are pour point depressant. Ordinary hydraulic oil is roughly equivalent to foreign rust oxidation type (R & 0 type) of hydraulic oil. For the high-pressure and high pressure hydraulic system, and its abrasion resistance is not good enough, therefore, high pressure and high pressure systems should be anti-wear hydraulic oil, the current ordinary hydraulic oil in the world have gradually been replaced by the trend of anti-wear hydraulic oil.

2. Antiwear hydraulic oil

Antiwear hydraulic oil can be divided into a gray-type (ZDDP type) and non-gray two kinds. A gray-type anti-wear hydraulic oil with good abrasion resistance, the use of vane pumps can meet the requirements. Ash-free anti-wear hydraulic oil in the hydrolytic stability, breaking resistance, the availability of oil filter and heat, oxidation stability is better than zinc antiwear hydraulic oil. Performance standards equivalent to DenisonHF-O.
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