SU974096A1 - Method of measuring cylindrical gearing rigidity - Google Patents

Description

The invention relates to mechanical engineering, in particular to methods for measuring the characteristics of gears.

A known method for measuring the stiffness of the gears of cylindrical gears, which consists in placing a gear in a dynamic test stand, rotates the gear until the mating pair of teeth enters the desired gearing phase, loads the counterpart gears with a working load, then records the engagement phase and tooth deformation. From the obtained displacement of the drive wheel relative to the driven by calculation, taking into account the phase, the engagement rigidity is determined. 1.

The disadvantage of this method is the large laboriousness of determining the stiffness of the gearing engagement even for one particular teeth engagement phase, as well as the low accuracy of setting the tooth engagement phases during measurements.

The closest to this invention is a method for measuring the stiffness of the engagement of cylindrical gears, consisting in

that a controlled gear is mounted on a dynamic test bench, in which one of the wheels is assembled, made of two rims with teeth removed through one, offset from one another, to ensure engagement with the matching wheel, rotate the gear

10, before the mating pair of teeth enters the required engagement phase, it is loaded with a shock load, then the engagement phase and the natural frequency of the oscillation are recorded in a forest. By the reduced mass of the wheels and the frequency of their own oscillations, taking into account the phase, the engagement rigidity 2 is determined.

However, in the known method of measuring 20, the accuracy of the principles is very low and the laboriousness of determining the stiffness of the gearing engagement is low, even for a specifically picked up tooth engagement phase.

25

The purpose of the invention is to improve the measurement accuracy.

The goal is achieved by the fact that, according to the method for measuring stiffness, a controlled

Claims (2)

A 30 gear drive to a stand for dnzmicheskih tests, in which one of the wheels is assembled, made of two crowns with teeth removed through one, offset from each other to ensure engagement with the mating wheel, rotate them until the matching pair of teeth enters into the required the engagement phase is loaded by the working load of the adjacent teeth of the wheels, then the engagement phase is recorded that determines the engagement stiffness, includes additional operations that determine the duration contact of each mated pair of teeth during operation and the steps of engagement, then determine the overlap ratio of the gear teeth and judge the stiffness. 2 - plots of the duration of the contact of teeth and the steps of engagement with dynamic tests. To implement the method for measuring the stiffness of gearing of gear wheels, for example, a dynamic test bench containing a base 1, on which a drive 2 is installed, is continuously adjustable and the driver and the spindles 3 and 4 are installed. On the spindle 4, a brake loader 5 is installed, from a measurer 6 braking torque and contactless transducer 7 angular displacements. Based on 1 ,. In addition, amplifying equipment 8 is installed to measure the engagement phase of the monitored wheels 9 and 10. The wheel 9 mounted on the driving spindle 3 is prefabricated and two rims with a tooth r-m removed through one offset from each other to ensure engagement with wheel 10 mounted on a known spindle 4 The crowns of the modular wheel 9 are electrically isolated from each other and together by the wheel 10, as conductive elements are connected to the input of the amplifying equipment 8, and when the wheels are rolled 9 and 10 form two direct current generators, which make it possible to measure the phase phase of these wheels. The method is carried out as follows. When measuring the stiffness of the engagement, the gears 9 and 10 are mounted on the spindle x 3 and 4 of the dynamic test stand and introduced into the engagement at a predetermined center distance. The crowns of the collecting wheel 9 and the wheels 10 are connected using flexible wires running inside spindles 3 and 4 through current collectors are not shown to the inputs of the amplifying equipment 8. Rotate the gear until the mating pair of teeth enters the desired engagement phase. After this, the power-recording equipment 8 is turned on, the dynamic mode of the gear drive is set at the operating speed, by means of an adjustable drive 2 and the working load of the wheels by means of the brake load 5. The phases of engagement of the teeth are recorded and the duration of contact L is determined (Fig. 2) each individual mating pair of teeth and the steps. (P, Pj). Then, the transmission teeth overlap coefficient () under the tested operation mode is determined according to the following relationship: s - L s.r-, After that, the gearing stiffness of the teeth of the transmission wheels is calculated depending on the measured overlap ratio, according to the following equation C. p 1-0,4 (1 - fj, where X is the phase of engagement of the teeth, expressed in fractions of the measured engagement step (corresponds to the input of a pair of teeth into engagement; x 6 -1 the beginning of a single pair engagement of this pair of teeth; x./2 - pole meshing; X - - leaving a pair of teeth out of gearing The described method makes it possible to double the measurement accuracy and reduce the cost of obtaining measurement results by 10%. Formula of the invention A method for measuring the stiffness of engagement of cylindrical gears, is to install a controlled gear on a stand for dynamic tests, one of the wheels is an assembly made of two crowns with teeth removed through one that are offset from each other to ensure engagement with the matching wheel and turn gear to the motion of the mating pair of teeth into the required engagement phase, load the associated teeth of the wheels with a working load, then record the engagement phase, according to which the engagement stiffness is distinguished, and so that, in order to improve the measurement accuracy, the duration contact of each mated pair of teeth in the process the work and the engagement steps, then the tooth overlap ratio of the transfer teeth is determined and judged by its stiffness. Sources of information taken into account during the examination 1. Increasing the load capacity of gears and reducing weight. M. , Mashgiz, 1956, kn.81, p. 172-176. 2. Kudr vtsev LA Experimental studies of the effect of the errors of the main pitch and the variable stiffness of the engaging teeth on the I movement of the spur gear. Dis. on the competition, the degree of Cand. tech. sciences. M., Mosstankin, 1963, p. 43-46 (prototype).