RU2011108C1 - Method of centrifugal application of greases on surfaces - Google Patents

Abstract

FIELD: mechanical engineering. SUBSTANCE: grease is applied to surfaces under action of centrifugal forces acting on particles of grease when they are rotated by rotor. Secured on rotor over helical lines through slit in housing are rods; rotor is rotating inside housing. EFFECT: enhanced efficiency. 3 dwg

Description

 The invention relates to the application of liquid, semi-liquid, pasty or powder materials on the surface.

 Currently, the following methods for applying greases are known: mechanical spreading, extrusion followed by spreading, dipping into a heated grease, pneumatic or mechanical spraying of a heated grease.

 Mechanical lubrication requires preliminary preparation of the lubricant to the required plasticity, special devices for supplying lubricant to the place of its application.

 Squeezing followed by smearing also requires preliminary preparation of the lubricant to the required plasticity. When extruding, the plasticity of the lubricant decreases.

 Dipping in heated grease requires special preparation of grease with a change in its state of aggregation - as a result, significant energy consumption. The method is not environmentally friendly, since when heating greases, light fractions are released that are harmful to the environment.

 Pneumatic or mechanical spraying of a heated grease also requires special preparation of a grease with a change in its state of aggregation. The method has a significant energy intensity and is not environmentally friendly. This method has a loss (up to 15%) of lubricant due to fogging.

 The closest technical solution is the method of applying liquid paints and varnishes to the inner surface by centrifugal spraying systems.

 With this method, the paint is supplied to the sprayed head (disk, cone), mounted in the center of the internal cavity of the product and rotating at a high peripheral speed. Due to the action of centrifugal forces, the paint is stretched into a film moving towards the edge of the disk and discarded from it. In this case, the film is torn into separate droplets flying along a path coinciding with the tangents to the edge. Dispersed paint forms a symmetrical circular torch, which increases in width with distance from the center of the head.

 However, the known method has the following disadvantages. This method can be used to apply a heated grease with all the disadvantages that result from this: significant electrical consumption, harmful effects on the environment, loss of lubricant (up to 12%) on fogging.

 This method cannot be applied without fundamental changes for the mechanical application of a grease without heating it, that is, without changing its state of aggregation.

 The aim of the proposed method is to increase the productivity of applying grease by mechanical, without changing the aggregate state of the grease, applying it to the surface with simultaneous mixing, improving ductility and moving to the place of application.

 This goal is achieved in that the lubricant is applied by a rotor with rods fixed to it along helical lines. The rotor rotates inside the housing, mixes and moves the grease from the loading window to the gap of the housing, through which the grease is ejected by centrifugal forces onto a surface area that will be against the gap.

 To apply grease to the entire surface, it is necessary to move the slot relative to the surface or the surface relative to the slot.

 The density of the lubricant on the surface depends on the centrifugal force acting on the particles of the lubricant (rotor speed and specific gravity of the lubricant).

 The thickness of the applied lubricant layer depends on the clearance between the lubricated surface and the housing.

 In FIG. 1 is a schematic of applying grease to the inner surface of rotation; in FIG. 2 is a diagram of applying grease to an outer surface; in FIG. 3 is a diagram of applying grease to a flat surface.

The centrifugal method of applying greases was tested at the South Pipe Plant in Nikopol to apply a sealing and preserving grease to the inner surface of the coupling d _y = 146 mm.

 In accordance with FIG. 1 through the loading window, grease is supplied inside the housing 3 to the rotating from el. the engine to the rotor 1. The rods 2, mounted on the rotor 1 along helical lines, mix the grease, make it more plastic and at the same time move it from the loading window to the slot Щ of the housing.

 Under the action of centrifugal force, the grease is ejected through the slot Щ of the housing 3 to a portion of the inner surface of the coupling.

 To apply grease to the entire inner surface, the coupling makes one revolution.

 Feasibility study.

Using the proposed method for applying grease to the surface provides the following advantages compared to existing methods:
1. Combining the processes of moving the lubricant to the place of application, mixing and applying it to the surface.

 2. Improving the technological properties of the lubricant when it is applied to the surface, since when applying the lubricant it is intensively mixed and, therefore, the lubricant becomes more plastic.

 3. Lower energy consumption, since there is no liquefaction of the lubricant by heating.

 4. The possibility of applying to the surface of sealing greases with fibrous fillers.

 5. The possibility of applying greases or coatings that do not allow their heating.

 6. No loss of grease. (56) Gots V.L. Technique for painting internal surfaces, M.: Mechanical Engineering, 1971, p. 37.

Claims (1)

 METHOD FOR CENTRIFUGAL APPLICATION OF GREASES ON THE SURFACE, in which the grease is applied to the surface under the action of centrifugal forces acting on the particles of the lubricant when the rotor rotates, characterized in that, in order to increase the productivity of the grease application process without changing its aggregate state, applying it the surface is carried out by a rotating rotor with rods fixed on it along helical lines through the slot of the housing in which the rotor rotates.

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