Smooth gearing of open gears and the need for smoothener function

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Smooth gearing of open gears and the need for smoothener function

Source: Bearing network time: 2017-11-14
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In the open gear transmission, it is easy to fall into the external medium such as dust and chips to form smooth oil pollution; the gear is prone to abrasive wear. When the split gear is covered, under the same working conditions; the smooth demand and closing of the open gear The same gear.
Open gear transmission usually uses high viscosity oil, asphaltene smoothing agent or smooth grease; and can work at a relatively low speed. There are three levels of classification; usually open gear oil (CKH), extreme pressure open type Gear oil (CKJ) and solvent-diluted open gear oil (CKM).
When deciding on open gear transmission smooth oil; the following elements should be considered:
1) the degree of closure,
2) the peripheral speed,
3) Gear diameter scale,
4) the environment,
5) The application of smooth oil,
6) Accessibility of the gear.
Except in some cases, the smooth oil can be circulated and recirculated; the oil pool should be provided at this moment. The smooth method of the open gear transmission is usually full loss type; and any full loss type smooth system; the end of the gear surface is covered by a thin layer Membrane; they are often in a smooth condition of the gap; because when new oil or fat is added to the tooth surface; because the tooth surface pressure is applied, it is extruded; plus the effect of centrifugal force such as gear reversal; only in the tooth surface A thin oil film is left on the surface; together with the effect of gear wear and running; therefore, it is necessary for the smooth oil to have high viscosity or high consistency and strong adhesion; to ensure that a layer of successive oil film remains on the outer surface of the gear.
Open gears are exposed to changing environmental conditions; for example, open gears for northern canal sluices operate below 0°C in winter; open gear systems for paper machine dryer drums operate at high humidity and above 60°C At ambient temperature, cement kiln drum ring gears operate under hot, rain and dust conditions; in automated production plants; large open gears in large mechanical presses; their environment is not a critical factor; If the smoothing agent on the gear is thrown away, then the risk of damage to the gear still exists.
The most common type of open gear-driven smooth oil is a black, gummy, extremely heavy petroleum residue like tar pitch; this material has a protective effect on the gears; they are used; it is necessary to heat soften. After the oil supplier adds a solvent; makes them a liquid; this solvent is an evaporative non-toxic hydrocarbon; applied or sprayed directly when applied; when the solvent evaporates; Similar rubber membranes are masked on the tooth surface; to reach the hazard of obstructing wear, dust and water; the end of the arrival of the gears. Some types of open gear smoothing agents are required to participate in extreme pressure antiwear additives; when they touch the atmosphere After; can be thicker and firmly attached to the gear surface; to hinder the accumulation of dust and water corrosion.
When thinking about the smooth method; it should be known that circulating oil is more useful and convenient for smoothing gears than periodic refueling. For small open gears and gear trains, soft smooth grease can be used.
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