RU2601479C1 - Method of gear wheel lubrication - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to machine building, particularly, to machine parts, and can be used in pressurized rotaprint lubrication of gear wheels. For gear wheel lubrication initialize gear teeth running-in, with pressing to them lubricating element in form of pinion with teeth, which are made out of pressed lubricating material. During running-in gear is subjected to axial oscillating movements relative to wheel, and pinion teeth width is set equal to sum of wheel teeth width and double amplitude of oscillation movements, which is set equal to value of wheel teeth width, but not less than one said width.

EFFECT: higher quality of gear wheel lubrication.

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Description

The invention relates to mechanical engineering, in particular to machine parts, and can be used for rotaprint lubrication of gears of mechanical gears.

A known method of lubricating a gear wheel is rotaprint, which consists in rolling in the working surfaces of the teeth of the gear ring with a special lubricating element in the form of a gear made of pressed lubricant; this gear is meshed with a lubricated gear wheel, with compression to it; under the action of the forces, the compressed lubricant is transferred from the gear teeth to the lateral (working) surfaces of the teeth of the lubricated wheel, lubricating them - see, for example, “Drozdov Yu.N. et al. Friction and wear under extreme conditions: Reference book / Yu.N. Drozdov, V.G. Pavlov, V.N. Puchkov. - Engineering, 1986. - 224 p.: Ill. - Fundamentals of machine design) ”, p. 191.

The disadvantage of this method is the insufficient efficiency of transfer of lubricant from the teeth of the lubricating gear to the lubricated teeth of the wheels, because the transfer is carried out due to the adhesive interaction of the contacting surfaces of the gear teeth and the teeth of the wheel, and this interaction is not sufficient for the effective transfer of lubricant to the lubricated surfaces of the gear teeth due to the fact that the contact of the surfaces of the gear teeth and paired surfaces of the gear teeth occurs in the mode of mutual rolling friction (with slight sliding friction between them in the region of the lateral (working) surfaces of their teeth, remote from the poles of their engagement).

As a prototype taken the method of lubrication of the gear according to the patent for the invention of the Russian Federation No. 2553673, class. F16H 57/04, publ. 06/20/2015, Bull. Number 17. This method includes rolling the teeth of the wheel, pressing them, a lubricating element in the form of a special gear with teeth made of extruded lubricant; moreover, in the process of rolling in the gear, axial vibrational displacements relative to the wheel are imparted, and the width of the gear teeth is set equal to the sum of the width of the gear teeth and the doubled amplitude of the vibrational displacement.

The disadvantage of the prototype is that giving the lubricating gear oscillatory movements relative to the lubricated wheel intensifies the processes of mass transfer of the lubricant from the teeth of the lubricating gear to the teeth of the lubricated wheel, which leads to increased wear of the gear teeth and, consequently, to their thinning; in this case, the kinematics of the interaction of the gear teeth and the wheel is violated, and there is also a risk of breakage of the gear teeth. This will require a more frequent replacement of worn lubricating gears with new ones - to ensure a normal lubrication of the teeth of the wheel. Also in the prototype is not specified the magnitude of the amplitude of the oscillations of the gear relative to the wheel. So, if the amplitude is less than the width of the gear, the parts of the gear, between the parts of the output of the gear from the gearing zone with the wheel, will constantly be in contact with the wheel, undergoing wear, and this wear will be twice as much as in the parts of the gear coming out during vibrations gears from the zone of contact with the wheel. This will lead to uneven wear of the gear teeth along their width and also require frequent replacement of the gear, despite the fact that part of the width of their teeth (along the edges of the teeth - in the areas where the gear teeth come out of engagement with the teeth of the wheel) will be less worn.

The invention solves the problem of improving the quality of lubrication of the gear.

To this end, a method for lubricating a gear wheel includes rolling in the teeth of the wheel, with compression thereto, a lubricating element in the form of a gear with teeth made of pressed lubricant; in the process of rolling in the gear, axial vibrational displacements relative to the wheel are imparted; the width of the gear teeth is set equal to the sum of the width of the teeth of the wheel and twice the amplitude of the oscillatory movements; moreover, the magnitude of the amplitude set a multiple of the width of the teeth of the wheel, but not less than one of this width.

The invention is illustrated by drawings, which depict a pair of "lubricating gear - lubricated gear" (side view). Symmetric (central) position of the gear relative to the wheel - FIG. 1, the extreme left position of the gear relative to the wheel - FIG. 2, the extreme right position of the gear relative to the wheel - FIG. 3.

The drawing shows a lubricated gear 1, a lubricating gear 2, an axis 3 of the gear; the direction of rotation ω gear (2), the moving direction V gear (2) relative to the wheel (3), the width B of _the wheel (1), the width B _w gear (2), the amplitude A vibrational displacement gear (2).

This method is implemented as follows. When the lubricated wheel 1 is driven in by a lubricating gear 2 (with the gear pressed against the wheel), the pressed lubricant, from which the gear teeth are made, is transferred from the surfaces of the gear teeth on the surface of the gear teeth. Giving the gear oscillatory movements relative to the wheel intensifies the processes of mass transfer of the lubricant from the gear to the wheel. And the implementation of the lubricating gear of increased width (at least twice as large as the width of the wheel, the drawing shows a variant of the tripled width of the gear teeth ( _{H w} ) with respect to the width of the wheel (H _k ) -H _w = 3V _k ) allows you to alternate sections of the gear teeth, involved in contact with the teeth of the wheel. This optimizes the mass transfer process of the lubricant and helps to ensure uniform wear of the gear teeth along their entire width. The width of the gear teeth, a multiple of the width of the gear teeth, it is desirable to set as large as possible, within the dimensions of the transmission.

Compared with the prototype, the proposed method for lubricating the gear wheel allows you to reduce the wear rate of the gear teeth (over their entire width) and make the wear of these teeth uniform across the entire width of the teeth. This increases the working life of the lubricating gear. In addition, the exit of the parts of the gear beyond the contact with the wheel allows these areas to move outside the contact zone of the wear products formed during the operation of the wheel (which will either be independently removed from the surfaces of the gear teeth or can be removed by means of additional devices, for example, by means of magnets). All this improves the quality of gear lubrication with a lubricating gear.

Claims (1)

A method for lubricating a gear wheel, mainly a rotaprint method, including rolling in the teeth of a wheel, with compression thereto, with a lubricating element in the form of a gear with teeth made of pressed lubricant; in the process of rolling in the gear, axial vibrational displacements relative to the wheel are imparted, and the width of the gear teeth is set equal to the sum of the width of the teeth of the wheel and the doubled amplitude of the vibrational movements, characterized in that the amplitude value is set to a multiple of the width of the teeth of the wheel, but not less than one of this width.

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