RU2541560C1 - Method of torsion oscillations creation - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: method of torsion oscillations creation in the structure in which the driven shaft combines the uniform rotation of the drive shaft and oscillations of the torsion oscillation exciter. The drive shaft is installed in parallel with the driven shaft set to the oscillations by interaction of one kinematic pair crated by surfaces of teeth of the idler and pinion.

EFFECT: possibility of use in the reducing gears with parallel shafts; reducing of probability of unforeseen impact load; improved working efficiency and performance.

1 dwg

Description

The invention relates to pulse drives of machines with a rotating working body (pulse rotators) for destruction, transportation, mixing, etc. processed materials.

There are dynamic and kinematic methods for creating torsional vibrations by a mechanical exciter of torsional vibrations.

A known method of creating torsional vibrations based on the synthesis of the planetary mechanism and the dynamic causative agent of torsional vibrations (AS USSR No. 1810914 A1, publ. 04/23/93, bull. No. 15, class. H01C 17/24), where the excitation of torsional vibrations occurs for account of rotation of eccentrically located masses on the planetary gear satellites; the kinematic method for creating torsional vibrations is known (RF patent No.86188, publ. 30.08.94, bull. No. 16, class. E21B 3/02); A method of creating torsional vibrations is known (RF patent No. 2335676, publ. 10.10.2008, bull. No. 28, CL F16H 25/16, E21B 3/02, B06B 1/16).

The closest technical solution is a method of creating torsional vibrations (RF patent No. 2335676, published 10.10.2008. Bulletin No. 28, class F16H 25/16, E21B 3/02, B06B 1/16), where the cam rotates on the drive shaft and slides along the surface of the housing with fixed cams and on the surface of the driven shaft. The frequency response is determined by the number and shape of the cams.

The disadvantage of this method of creating torsional vibrations are: restrictions on the use of coaxial arrangement of gearbox shafts; reduced efficiency; the complexity of the design by the need for the introduction of additional kinematic pairs; increase in drive dimensions due to the separation of the driven shaft into two parts; increased wear in additional kinematic pairs; an increase in the probability of shock loads with increasing amplitude or frequency of oscillations due to the curvature of the cam surface and the inertial properties of the drive.

The technical result of the claimed method is: the possibility of application in gearboxes with parallel shafts; reduction in the likelihood of an unexpected shock load; increased efficiency and efficiency by eliminating the additional kinematic chain and kinematic pairs.

The specified technical result is achieved by eliminating additional devices of the causative agent of torsional vibrations, using parallel shafts with the replacement of involute gearing of the teeth with a special contact profile of the driving and driven gears. A method for creating torsional vibrations is proposed, in which the driven shaft summarizes the uniform rotation of the drive shaft and the vibrational movements of the torsional vibration exciter, while according to the invention, the drive shaft is parallel to the driven shaft, which is driven by the interaction of one kinematic pair formed by the tooth surfaces of the driven and drive gears .

This is possible provided that in the causative agent of torsional vibrations of one kinematic pair of the contact surface of the teeth, while the surface of the teeth provides a certain characteristic of torsional vibrations without additional links and kinematic pairs.

Based on this, it is possible to carry out the specified amplitude-frequency parameters of torsional vibrations. The contact surface of the tooth of the driving gear is cylindrical, and the driven one is flat. The contact point of the tooth of the driving and driven gears has a variable radius.

A method for creating torsional vibrations is proposed, in which the driven shaft summarizes the uniform rotation of the drive shaft and the vibrational movements of the torsional vibration exciter, while according to the invention, the drive shaft is parallel to the driven shaft, which is driven by the interaction of one kinematic pair formed by the tooth surfaces of the driven and drive gears .

Torsional vibrations occur due to changes:

1. The contact radius on the driven and drive gears;

2. The inclination of the tooth surface of the driven gear.

The number of teeth determines the frequency of oscillation, the value of the slope of the surface and the radii of the wheels determine the amplitude of the oscillations. The change in the pattern of the pulse with a flat tooth surface of the driven gear depends on the angle between the velocity vectors of the contact points of the driven and driving gears and the magnitude of the change in the radius of the contact points ΔR = Rmax-Rmin at the beginning and at a minimum distance from the center of rotation of the driven gear.

The proposed method of creating torsional vibrations allows you to adjust the dynamic characteristics of the working process by changing the slope of the surface and the height of the tooth.

The claimed technical solution differs from the prototype in that the combination of the rotational movement of the driven gear and the relative translational motion of the tooth of the pinion gear on the surface of the driven gear due to one kinematic pair, while the second provides a kinematic closure of the cam and a given amplitude-frequency characteristic of the torsional vibrations of the driven shaft parallel to the drive, excludes the appearance of additional losses in the kinematic pairs and in the drive, as well as the shock load.

Signs that distinguish the claimed solution from the prototype are explained using the device shown in the drawing. The device comprises a drive shaft 1, gear 2, tooth 3 of this gear, a kinematic pair 4, driven gear 5, tooth 6 of this gear and shaft 7.

In the process of rotation of the shaft 1 and gear 2, its tooth 3 engages and forms a kinematic pair 4 with tooth 6 of gear 5 and shaft 7, gives gear 5 a torque impulse due to a change in the radius of rotation and the linear speed of the point of the highest class kinematic pair. On the shaft 7 of the gear 5 summarizes the uniform rotational movement of the gear 2 and the dynamic component of the kinematic pair 4. The gear 5 and the shaft 7 rotate with superposition of torsional vibrations.

Using the claimed method of creating torsional vibrations allows to reduce unforeseen dynamic and shock loads in the drive, to eliminate additional kinematic pairs and friction losses in the vibrodrive, to increase the durability of the exciter due to the distribution of the pulse generation force to all successively changing interactions of the pair of teeth of the driven and drive gears.

Claims (1)

A method of creating torsional vibrations, in which the driven shaft summarizes the uniform rotation of the drive shaft and the vibrational movements of the torsional vibration pathogen, characterized in that the drive shaft is parallel to the driven shaft, which is driven by the interaction of one kinematic pair formed by the tooth surfaces of the driven and drive gears.