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Thin film lubrication
| Oil glossary |
A condition of lubrication in which the film thickness of the lubricant is such that the friction between the surfaces is determined by the properties of the surfaces as well as by the viscosity of the lubricant.
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Lubrication, английский
- The control of friction and wear by the introduction of a friction-reducing film between moving surfaces in contact. the lubricant used can be a fluid, solid, or plastic substance.
- Смазка
- On no account should oil be used to lubricate pin-tumbler cylinders. graphite is the conventional lubricant for this mechanism.
- Смазка (действие)
- The act of injecting a fluid, normally bentonite and/or polymers, to reduce the skin friction and jacking forces on the jacking pipe during installation. the fluid fills the annular space.
- Means of reducing friction either around a pipe being jacked or a shaft being sunk into the ground.
- The control of friction and wear between two moving, touching surfaces by placing a friction-reducing substance between them.
- Control of friction and wear by the introduction of a friction reducing film between moving surfaces in contact. the film may be fluid, solid or plastic.
- Reduction of friction or wear between two load-bearing surfaces by the application of a lubricant; includes boundary lubrication (thin or interrupted fluid film, especially bearings where wear occurs); mixed film, where some liquid pools support the load; elastohydrodynamic (high-pressure loads increase the lubricant’s viscosity and load-carrying capacity, especially in gears); hydrodynamic (a thick fluid film lubrication, especially in journal bearings) and hydrostatic (external pump pressure used to form a thick fluid film, as in start-up of journal bearings).
Determined, английский
- A предопределённый
- Определенный
Properties, английский
- A dockable window that displays the properties that are set on the selected object. in most cases, the property values can be edited in the window.
- A ui element that users can click to display information about a selected object.
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Thixotropy, английский
- That property of a lubricating grease which is manifested by a softening in consistency as a result of shearing followed by a hardening in consistency starting immediately after the shearing is stopped.
- A characteristic of a fluid whereby the fluid’s viscosity decreases as a function of time at a fixed shear rate. viscosity tends to re-build with time as the shear stress is reduced. (example
- The property of a material like lubricating grease that is manifested by a softening in consistency as the result of shearing, followed by a hardening in consistency that begins immediately after the shearing stops. with thixotropic cleansers, shearing may occur with shaking, mixing, vibrating, pumping or stirring.
Thermography, английский
- The use of infrared thermography whereby temperatures of a wide variety of targets can be measured remotely and without contact. this is accomplished by measuring the infrared energy radiating from the surface of the target and converting this measurement to an equivalent surface temperature.
- A technique, used especially in screening for breast cancer, where part of the body is photographed using infrared rays which record the heat given off by the skin and show variations in the blood circulating beneath the skin
- Imaging or viewing of an object or process through sensing of heat emitted by it. the temperature patterns on the material surface produce corresponding radiation patterns. thus, heat flow by both conduction and radiation may be observed and used to locate material discontinuities. most often, thermography is based on sensing of infrared radiation. see also infrared thermography.
- In infrared and thermal testing, technique that uses infrared radiation to seek discontinuities in materials, components, and structures. thermography may be active (pulsed thermography or thermosonics) or passive (thermal wave imaging or infrared thermography).
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