SU1307219A1 - Method of checking worm gear wear of reduction gear-box - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to mechanical engineering, in particular to methods and means of controlling gearing. The purpose of the invention is to improve the accuracy by taking into account the axial stroke of the screw when the worm wheel is locked. This is achieved by simultaneously determining the angular stroke of the screw and the axial stroke of the screw and, taking into account these data, determine the wear of the worm gear of the gearbox without disassembly. 4 il.

Description

11307219

The invention relates to the machine 5

the structure, in particular, the methods and means of controlling gearing.

The purpose of the invention is to improve the accuracy by taking into account the axial stroke of the screw when the worm wheel is locked.

Fig. 1 shows a structural diagram of a device for implementing, by means of screws 14, a mechanism 12 for orienting a radiation source 13 (laser). The installation is monitored visually, until such a laser position is reached, when the trail of the direct beam and reflected from the scale 15 of the reference point coincide. In case of a mismatch on the transparent vernier scale 9, the trace from the direct and reflected

of the control method of the worm O rays. At the same time, such a transfer is achieved; Fig 2 is the same, top view; Fig. 3 shows a metrological scheme for determining the angular course of the screw; Fig. 4 is a metrological diagram for determining the axial stroke of the screw.

A device for implementing a worm gear wear monitoring method includes a base 1, a bracket 2 mounted thereon, columns 3 fixed in a bracket 2 on which an outer surface is threaded, two sliding sleeves 4 and 5 located on a column 3, rack and pinion mechanism 6 with axis 7 connected with a sliding sleeve 4, mechanism 8 for orientation of a transparent vernier cabinet 9, located on a rack and pinion mechanism 6, assembly site 10 with axis 11 mounted on a sliding sleeve 5, mechanism 12 for orientation, radiation source 13 ( for example, laz ep kinematically associated with the orientation mechanism 8 by means of micrometric screws 14, a prismatic reference scale 5 mounted on a worm 16,

In addition, to clarify the operation of the device, the drawings show a locking mechanism 17, made in the form of two detachable half-rings 18, interconnected by bolts 19 and with the transmission housing 20 - bolts 21, Indicator 22, is installed in the holder of the magnetic rack 23, Ball tip 24 of the indicator 22 relates to the face of the screw 16,

The method is implemented as follows.

Include a source of 13 directional light (laser), Set the laser normally to one of the faces of the scale 15 of reference. This is achieved by changing the position of the clamping assembly on the base 1, moving the sliding sleeve 5 along column 3, changing the position of the mounting pad 10 on the axis P, adjusting the micrometer screws 14 of the mechanism 12 for orienting the radiation source 13 (laser). The installation is monitored visually, until such a laser position is reached, when the trail of the direct beam and reflected from the scale 15 of the reference point coincide. In case of a mismatch on the transparent vernier scale 9, the trace from the direct and reflected

five

0

five

0

when the beam intersects the longitudinal axis of the high-speed transmission shaft (Fig. 3), the laser remains in a normal position relative to the edge of the reference scale.

The plane of the vernier scale 9 is set to normal to the laser beam (13). The control of this setup is carried out visually. To do this, a plane-parallel mirror (not shown in FIG. 1) is placed on the plane of the Vernier scale 9, the adjusting screws of the orientation mechanism 8 and the rack mechanism 6 achieve the position of the Vernier scale at which a single beam trace is observed in the mirror. a strip of multiply reflected rays is observed.

The mirror is removed. The locking mechanism 17 fixes the low-speed shaft against rotation and axial movement, for which the half rings 18 are pulled with bolts 19 on the half-coupling of the low-speed shaft and press the half rings 18 to the gear housing 20 with bolts 21. The process of controlling the wear of the worm gears of the gearboxes is carried out according to the schemes shown in FIGS. 3 and 4,

The laser (13) is set normally to the edge 15 of reference, while the laser beam should cross the longitudinal axis of the screw 16, then normally to the axis set the plane of the Vernier scale 9, Fix the position of the low-speed transmission shaft from turning and axial movement by the stopper mechanism 17,

The holder of the magnetic rack 23 is fixed indicator 22 movements of the hour-type. The ballhead 24 of the indicator 22 touches the end surface of the screw 16,

0

five

The dead stroke of the transmission is determined, for which an alternating torque is applied to the screw 16, and for each extreme position

S13072:

Take readings on the reference scale, vernier scale and dial gauge.

The magnitude of the lateral gap h is defined as the difference of the samples for the j extreme positions of the screw from the expression

h (b. H-) - A,

where H is the angle of rotation of the shaft of the screw;

And - axial movement of a shaft of the worm;

b - coefficient of proportionality.

The coefficient b is determined by the formula

At m - Z 1- 1000 .b .--,

where m is the transmission module,

2 - NUMBER of worm hits; - the calculated step of the worm;

m

Zi

- screw parameter

During the operation of the transmission, the amount of side clearance in the engagement increases by the amount of wear of the active surfaces, db.

ah h, - h.

where h

, hj is the amount of lateral clearance before and after testing. The wear of the active surfaces of the worm gear is a fraction of mil

of the meter, therefore defining character

j

0

- ..

20

25

thirty

. 35

94

The instrument's performance is sensitivity in measuring such small linear displacements.

The sensitivity of the device is determined by the transmission module and the distance L (FIG. 3). A change in the distance L leads to different ratios of the deviation S on the instrument and the measured amount of wear. A longer distance L corresponds to a greater sensitivity of the device.

The transmission module is included in the right-hand side of the expression that defines the calculation step of the worm

p J m.

As the transmission module decreases, the size of the worm's calculated step decreases, which, with a single amount of wear, leads to an increase in the angle of rotation of the screw shaft i /.

Claims (1)

Invention Formula The method of controlling the wear of the worm gear of the gearbox, which consists in fixing the worm gear against rotation and axial movement, determines the speed of the worm and determines from it the wear of the worm gear that differs in that , simultaneously with the angular stroke of the screw, the axial stroke of the screw is determined, and taking into account these data, the wear of the worm gear is determined. f7 18 five sixteen / lazep Compiled by B.Athonsky Editor T.Parfenova Tehred A. Kravchuk Proofreader S.Shekmar 1618/37 Circulation 678 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab ,, d.4 / 5 Production and printing company, Uzhgorod, ul, Proektna, 4 fcj