SU805097A1 - Method of gear-train diagnostics - Google Patents

Description

I

The invention relates to mechanical engineering, in particular to the technical diagnostics of gears, and can be used in testing devices containing gears with a medium and large module.

A known method for diagnosing gears, comprising loading the diagnosed transmission with a torque before and after the tests, measuring one of the transmission parameters and examining the state of the transmission 1.

The disadvantage of this method is that it does not allow to determine mating defects with the required accuracy, since the shaft twist angle, which is the controllable transmission parameter, depends not only on the wear of the working surfaces of the teeth of the diagnosed gear, but also on the landing elements, shaft deformations and the teeth themselves,

The purpose of the invention is to improve the accuracy of determining mating defects of teeth.

This target is achieved by the fact that they are mounted on the end of a tooth — one gyr wheel of the diagnosed gear.

a contactless inductive transducer and an additional tooth made of a ferromagnetic material attached to the end face of the tooth of the mating wheel, imitating the profile of the tooth of the mating wheel prior to testing, and the state of transmission is judged by the gap between the inductive transducer and the additional

About tooth.

FIG. 1 shows a device that implements the proposed method; in fig. 2 is a view A of FIG. one.

At the ends of the gear teeth 1 fixed with brackets 2

5 of non-magnetic metal, at least one non-contact inductive transducer 3, at the end of the tooth, v. matched with wheel 1 wheel 4, an extra tooth 5 of

0 ferromagnetic material, imitating the tooth profile of the mating wheel 4 before the test, and forming the base surface, which can be formed and non-contacting

5 by the surface of the teeth of the gear 4 itself, if the gear 4 is made larger than the wheel 1, in this case the base surfaces of the teeth should separate

0

from working surfaces by groove 6 to eliminate the effect of base surfaces on transmission efficiency. Inductive transducers 3 are connected via a current collector 7 and an amplifier 8 with a recording device 9.

Before the start of the test, the gap 5 is measured between the contactless induction BHFcjM transform T1 3 and the base surface of the wheel 4.

During the gear test process, due to the wear of the working surfaces of the teeth of the diagnosed wheels 1 and 4, a corresponding decrease in the gap 5 occurs. The change in the size of the gap S is recorded by the device 9. The gap increments determine the amount of wear on the working surfaces of the gear teeth. Installing inductive converters 3 at different heights of the tooth of the wheel 1, you can measure the distribution of wear along the height of the teeth of the gear

transfer.

The proposed method also makes it possible to measure the change in the thickness of the oil layer in the contact zone depending on the type of lubricant, comparing the gap values. under different conditions in the same test conditions.

When installing inductive transducers 3 at both ends of the teeth of the gear wheel 1, by the difference in the readings of the inductive sensors you can determine the amount of skew of the teeth of the gear.

When diagnosing gears according to the proposed method, differential measurement and determination of mating defects of teeth of gears with an average and large module is provided under operating conditions without disassembling the transmissions, and thereby increasing the accuracy of determining mating defects of teeth.

Claims (1)

Invention Formula A method for diagnosing gears, comprising: loading a steep and (with its momentum diagnosed transmission before and after testing), one of the transmission parameters is measured and judged on the state of transmission that is different from of teeth mating defects, a non-contact inductive transducer is mounted on the end face of the tooth of one of the wheels of the diagnosed gear and an additional tooth made of ferromagnetic material is attached to the end face of the tooth of the mating wheel rofil tooth mating wheel before the test, and on the transmission state is judged through the gap between the inductive. 0 transducer and additional tooth. Sources of information taken into account in the examination 1. USSR author's certificate 5 609073, cl. G 01 M 13/02, 1976 (prototype).