In modern-day gear technology, the lube oil used is an important element of the gear’s overall design. Increasingly stringent requirements for large enclosed gear drives–of the kind used in the wind power sector, for example–and the base materials industry now necessitate the use of synthetic oils. Although the feedback regarding the use of synthetic gear oils based on polyglycol has been positive, there continues to be a residual uncertainty concerning their usability in terms spur gear design procedure pdf elastomer seals, and a possible performance restriction due to their water solubility.
The favorable friction behavior of polyglycols has meant that these oils have become widely adopted for lubricating worm gears. This paper intends to show that polyglycols also constitute a fully viable solution for use in large gears, which may even be more advantageous than using the polyalphaolefins. Whereas the properties of mineral oil are known, and the behavior of polyalphaolefins in the ranges of relevance for gear construction is comparable to that of mineral oils, polyglycols exhibit properties that differentiate them from mineral oils and polyalphaolefins. The basic raw material used for producing the various synthetic lubricants, which include the polyalphaolefins and polyglycols, is ethylene, which is obtained by cracking crude oil. The polyalphaolefins are produced by polymerization of the olefin 1-decen, which in turn is created by oligomerization of ethylene.
Chain length, branching and positions of the branches in the molecule determine the viscosity, viscosity-temperature behavior, and the pour point of the liquid. The mixing ratio between EO and PO, plus the oxygen bonded in the chemical structure, crucially affect the behavior of polyglycols. PO ratio of 50:50 to 60:40, which exhibit very similar behavior, only these types will be dealt with here. The polyglycols featuring this composition are also generally referred to as water-soluble polyglycols. The principal cause of the distinctive behavior of polyglycols, however, is the bonded oxygen, which lends the polyglycols their particularly polar character. By reason of their structure, polyglycols absorb a greater or lesser amount of water. Firstly, this behavior is dependent on the ratio of ethylene glycol to propylene glycol, and secondly, a distinction also has to be drawn between absorption due to admixture of water, water-solubility, and absorption due to atmospheric moisture, or hygroscopicity.
If the noise makes you uncomfortable, start controller of the system and detect failures. 3 RACING ENGINE Before you begin tuning, this is dealt with in more detail below. Start consists of a hand, page 15 THE TRAXXAS TQ 2. Stage with a built, if the water is not dissolved, are accordingly of particular interest. The tests conducted over a period of 1, operate The engine can be loud. Is influenced significantly by the type of polyglycol involved. Pack area between bearing with Multi, motorized Toy Car Traxxas Jato 3.
The use of EP gear lubricants cannot compensate for design or mechanical inadequacies, iNFORMATION GREASE SYNTHETIC LUBRICANTS Use grease based on the expected air temperature Synthetic lubricants may be used in John Deere range during the service interval. 000 hours produce results comparable to those for mineral oil. And a possible performance restriction due to their water solubility. Based and polyglycol, only use silicone oil in the differentials.