SU1290125A1 - Stand for testing gearings - Google Patents

Abstract

The invention relates to mechanical engineering, in particular to testing equipment, and can be used in monitoring the wear of gears when testing them in stands of a closed loop, as well as in determining the anti-wear properties of transmission oils. The aim of the invention is to provide continuous monitoring of the wear of the tested gears by measuring the relative angular spread of the gears tested on one of the shafts of the test bench during the test without stopping the stand. When wear occurs, a relative angular rotation of the wheels 6 and 7 occurs, the value of which is determined by the number of pulses counted by the pulse counter 17 for the time from the moment when the control mark of the disc 11 of the reading device 13 passes through the moment of the passage of the control mark of the reading disk 14 of the reader 14. 2 hp f-ly, 1 ill. 5 SL to

Description

112

The invention relates to mechanical engineering, in particular to testing equipment, and can be used to control the wear of gears when testing them in the stands of a closed circuit, as well as in determining the anti-wear properties of gear oils.

The aim of the invention is to ensure continuous monitoring of the wear of the tested gears by measuring the relative angle of rotation of the test gears located on one of the shafts of the test bench during the test without stopping the stand

The diagram shows the schematic diagram of the proposed stand.

The stand includes a housing 1, shafts 2 and 3 placed in it with the possibility of rotation, the shaft 3 being torsionally made. Shafts 2 and 3 are used to install gears 4, 5 and 6, 7 of the tested gears, forming together with shafts 2 and 3 a closed loop, the load in which is created by a load carrier, made, for example, in the form of a cross-fold coupling 8. A drive motor 9 is connected to shaft 2, and a tachogenerator 10 and magnetic disks 11 and 12 are mounted on the torsion shaft 3, each of which has one control mark. Neither disks 2 interact with readout devices 13 and 14 connected to starting devices 15 and counting stops 16, which are part of a pulse counting unit, for example, an electronic counting frequency meter, which also includes a pulse counter 17. The latter is connected to an additional tag reader 18, which is part of a pulse generator, which also has a magnetic disk I9 attached to the torsion shaft 3 with evenly spaced marks around its circumference, with the angular distance d. between two adjacent labels selected from the condition: S

d,

where B is the minimum amount of total tooth wear to be measured, mm; R is the radius of the circle on which the wear is measured, mm. For example, when microns (0.004 mm),

R 100 mm oi 4-10 glad.

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In the case of application of a g-1 magnetic disk with a radius of R 200 mm, the marks must be located along its perimeter in increments of: t d R 4 810 mm, i.e. through 8 microns.

The stand works as follows.

Before starting up the stand in a closed circuit, load is generated by rotating the coupling half of the transversely coupled coupling 8 relative to each other, after which the mutual position of the coupling half is fixed by tightening bolts. The drive motor 9 is turned on, and the gears 6 and 7 and the torsion shaft 3 are driven the magnetic disks 11, 12 and 19 are rotated. When the control tag applied to the disk 11 passes the reader 13, a control impulse is fed to the counting device 15, the pulse counter 17 is started, which starts counting the number of labels disk 19 extending past the auxiliary device 18 reading. With the passage of a control mark deposited on the disk 12, past the reading device 14, the device 16 for stopping the count stops the pulse counter 17. When wear occurs, the teeth of the wheels 6 and 7 rotate relative to each other at an angle of 2j, as the relative position of the wheels 4 and 5 will remain unchanged (shaft 2 has a rigidity many times greater than the rigidity of the torsion shaft 3). Together with the wheels 6 and 7, the magnetic disks 11 and 12 will also rotate, therefore, the initial angle between the marks on these disks will change.

Due to this, the number of pulses counted by the pulse counter 17 during the time from the moment when the control mark of the disc 11 of the reader 13 passes the control until the control mark of the disc 12 of the reader 14 moves, the total wear of the 8 gears 6 and 7 during the test will be equals:

b AN-ct-R,

where AN is the difference between the number of pulses counted by a counter of 17 pulses at the beginning and at the end of the experiment; d is the angular distance between

tags on disk 19; R is the radius of the wheels 6 and 7, at which wear is measured, for example, the radius of the pitch circle,

Formula inventions

Claims (2)

1. Stand for testing gears in a closed circuit, comprising a housing placed in it rotatably and designed to install the wheels of the tested gears shafts, one of which is a torsion loader and a drive motor, characterized in that in order to ensure continuous monitoring of the wear of the subjects gears, it is equipped with discs mounted on the torsion shaft, the deck of which has one control tag, tag reading devices, an impulse counting unit connected to them and 01254 zanky with the latest frequency generator. 2. The stand according to claim 1, wherein the pulse counting unit is connected to the reading devices of the counting device of the counting start and stop device and connecting the last pulse counter connected to the generator pulses. I 3, Stand Popp. 1 and 2, characterized in that the pulse generator is made in the form of a magnetic disk fixed on the torsion shaft with evenly spaced marks around its circumference and in addition. A tel reader is connected to the 2Q pulse counter. to