RU2601482C1 - 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 transmissions gear wheels. For rotaprint gear wheel lubrication initializing gear teeth running-in, with pressing to them by lubricating element in form of pinion with teeth. Pinions with teeth 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 pinion oscillation movements. Pinion is made composite and consists of separate sections, gear rims teeth of which are aligned in plan view. Number of sections is set equal to number of wheel operating modes, and gear rim material of pinion each separate section and amplitude of its oscillation movements relative to wheel is set based on wheel lubrication optimum quality at wheel each separate operating mode, to which corresponds given pinion separate section.

EFFECT: enabling higher quality of gear wheel lubrication.

1 cl, 2 dwg

Description

The invention relates to mechanical engineering, in particular to machine parts, and can be used for rotary lubrication of gears with different modes of operation in gears.

A known method of lubricating a gear wheel (rotaprint), which consists in rolling in the working surfaces of the teeth of the gear rim of the wheel with a special lubricating element in the form of a gear made of pressed lubricant; this gear is meshed with a lubricated gear with compression to it; under the action of preload forces, the lubricant is transferred from the gear teeth to the side (working) surfaces of the teeth of the lubricated wheel, lubricating them - see, for example, Yu.N. Drozdov 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 the pair of 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 the material of the gear ring (lubricating element) of the gear and the magnitude of the amplitude of the axial vibrations of the gear relative to its lubricated wheel corresponds to one specific mode of operation of the wheel in gear, while these modes can be different (different values of the load of the gear teeth and t .P.). And with different operating conditions of the wheel, various modes of its lubrication are required, because, for example, with light operating conditions of the wheel (small loads of its teeth), relatively little lubrication of its teeth is required, and with heavy operating conditions of the wheel, the amount of feed to the teeth needs to be increased lubricant wheels insufficient lubrication of the teeth of the wheel will lead to increased wear, fraught with the failure of the wheel. And to proceed when selecting a lubricant (material of gear teeth) and the amplitude of the oscillations of the gear relative to the wheel based on the most difficult operation of the wheel is irrational, because this will lead to an increase in the cost of manufacturing a lubricating gear: for heavier operating conditions of the wheel, as a rule, more expensive lubricant and a large amplitude of vibrational movements of the gear relative to the wheel are required (the dimensions of the gear increase).

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, 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 of the gear; moreover, the gear is made integral, consisting of separate sections, the teeth of the gear rims of which coincide in plan; the number of sections is set equal to the number of wheel operating modes; the gear material of each individual section of the gear and the amplitude of its vibrational movements relative to the wheel is set on the basis of the conditions for optimal lubrication of the wheel for each individual mode of operation of the wheel, which corresponds to this particular section of the gear.

The invention is illustrated by the drawing, which shows a pair of "gear wheel - lubricating gear" (side view) in different phases of their pairing - Fig. 1 and 2.

The drawing shows: a gear wheel 1, a lubricating gear 2, an axis 3 of the gear; Width B _{to the} teeth of the wheel; Width _{W of the} gear ring gear; the width of the gear rims of the individual sections of the gear - B ₁ and B ₂ ; the magnitudes of the vibrational displacements of the gear sections — C ₁ and C ₂ ; directions of rotation of the lubricating gear - ω; the direction V of the oscillations of the lubricating gear relative to the lubricated wheel.

This method is implemented as follows. A lubricated gear wheel 1 with the width of its gear ring B _to during its operation is run in with a lubricating element - gear 2, the teeth of which are made of pressed lubricant; total width of the gear ring gear - In _w . In the process of rolling in the gear, vibrational displacements (V) are imposed relative to the wheel 1 lubricated by it. The gear is made of separate sections, the number of which is equal to the number of operating modes of the wheel (with two modes of operation of the wheel, the gear wheel with a total width of _{H w is} made of two sections, with the width of their gear rims In ₁ and B. _{2. The} teeth of the gears of the sections coincide in plan.The material of the gears of each individual section of the gear and the amplitude of its oscillatory movement (C ₁ for one section and C ₂ for the other section) refers The wheels themselves are set based on the condition of the relative lubrication of the wheel for each individual wheel operation mode, which corresponds to each individual gear section. Thus, for example, the material for the gear ring of a section operating with a relatively light wheel loading mode (jamming load equal to 510 N) can graphite, and with a heavier loading mode (seizing load equal to 1627 N) polytetrafluoroethylene (PTFE) can be.

Compared with the prototype, the proposed method allows optimal lubrication of the gear with each individual mode of operation, while the cost of manufacturing the gear is also optimal.

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 imposed, 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 gear oscillatory movements, characterized in that the gear is made integral, consisting of separate sections, the gear teeth of which are aligned in plan; the number of sections is set equal to the number of wheel operating modes; the gear material of each individual section of the gear and the amplitude of its vibrational movements relative to the wheel is set on the basis of the conditions for optimal lubrication of the wheel for each individual mode of operation of the wheel, which corresponds to this particular section of the gear.

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