RU2583413C1 - Gear box - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to machine parts, and can be used in tooth reduction gears. Gear reducer comprises gear lubed with liquid lubricating material, located in enclosed housing with oil bath. Inner surface of housing is coated with oil and petrol resistant coating with anti-adhesion properties in relation to lubricating material. Coating is applied on surfaces located above upper lubricant level bath.

EFFECT: reduced lubricant consumption due to applied onto surface coating.

1 cl, 1 dwg

Description

The invention relates to mechanical engineering, in particular to machine parts, and can be used in gears lubricated with liquid lubricants located in closed housings with oil baths.

Known gear reducer containing a gear, the gears of which are lubricated with liquid lubricant under pressure by means of jet nozzles, located in a closed housing with an oil bath - see, for example, Staroselsky Α.Α., Garkunov D.N. The durability of the rubbing parts of machines. M.: Engineering, 1967, p. 267, Fig. 162.

The disadvantage of this gear reducer is that the liquid lubricant in the process of applying it to the gears and during the rotation of the gears during the operation of the gear falls on the inner surfaces of the gear case, wetting them. Gear housings are usually made of metal - cast iron or sheet steel, which is well wetted by liquid lubricants, as a result of which the lubricant that has fallen on the inner surfaces of the gear case forms a layer of a certain thickness on them (the rest of the lubricant that has fallen on these surfaces, but not associated with them by the adhesion forces, flows from these surfaces into an oil bath). The layer of lubricant remaining on the inner surfaces of the gear housing has a sufficiently large surface, and on this surface this lubricant actively contacts the air surrounding it; at the same time, the lubricant is oxidized and its properties are deteriorated. In addition, a certain part of the lubricant used is consumed to wet the surfaces of the gear case, which requires an increase in the amount of lubricant used to lubricate the gear elements, which is irrational.

As a prototype, the design of a gear reducer containing a gear transmission is taken, the gear wheels of which are lubricated with liquid lubricant by immersing the lower gear wheels in an oil bath with lubricant located in a closed gear case. - see Dunaev P.F., Lelikov O.P. Machine parts. Course design: Textbook. allowance for machine building. specialist. technical schools. - M .: Higher. school, 1984. - 336 p., ill., p. 131, fig. 8.1.

The disadvantages of the prototype are the same as that of the analogue.

The invention solves the problem of preserving the properties of lubricants used for lubricating the elements of the gearboxes of the lubricants and reducing the required amount during lubrication.

To do this, the gear reducer contains a gear lubricated with liquid lubricant located in a closed housing with an oil bath, and on the inner surfaces of the housing an oil and petrol resistant coating with anti-adhesive properties in relation to the lubricant is applied, and the coating itself is applied on surfaces located above the upper level of the lubricant bath material.

The invention is illustrated in the drawing, which shows a gear reducer (in section).

The drawing shows: a gear consisting of a pair of gears 1 and 2, gear housing 3, oil bath 4, upper level 5 of the bath lubricant; depth h of the oil bath; A. coating

A gear reducer consists of a gear transmission, including a pair of mating gears 1 and 2, mounted in a closed housing 3 with an oil bath 4 of depth h and top level 5; the gears are lubricated by immersing one of the gears (1) in an oil bath 4. An oil-resistant coating A with anti-adhesive properties with respect to the lubricant is applied to the inner surfaces of the gear housing 3, the coating being applied to surfaces located above the top level 5 of the lubricant baths 4.

During operation of the gear transmission of the gearbox (wheels 1 and 2), lubricant is sprayed - when the wheel 1 is immersed in the oil bath 4 and the lubricant breaks off the surfaces of gears 1 and 2. This sprayable lubricant is deposited on the inner surfaces of the gear housing 3 . Part of this deposited lubricant flows into the oil bath 4, and part, wetting the inner surfaces of the gear housing 3, tends to stay on these surfaces due to the adhesion forces. The release coating A applied to these surfaces prevents the retention of the lubricant on them and facilitates its rapid runoff into the oil bath 4.

Compared with the prototype, the proposed gear reducer - due to the application of a coating on its internal surfaces with a release coating in relation to the lubricant - will help preserve the properties of the lubricant and reduce the required consumption of this lubricant.

Claims (1)

A gear reducer comprising a gear lubricated by a liquid lubricant located in a closed housing with an oil bath, characterized in that an oil-and-oil-resistant coating with a release property with respect to the lubricant is applied to the inner surfaces of the housing, the coating being applied to surfaces located above the upper level of the lubricant bath material.

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